{"gene":"NR5A1","run_date":"2026-04-29T11:37:57","timeline":{"discoveries":[{"year":1993,"finding":"Ad4BP (NR5A1) was identified as a steroidogenic tissue-specific transcription factor containing a zinc finger DNA-binding domain and a ligand-binding/dimerization domain, classifying it as a member of the steroid hormone receptor superfamily. It was purified from bovine adrenal cortex and shown to specifically bind Ad4 cis-acting elements in steroidogenic P-450 gene promoters (CYP11B) and to activate transcription of Ad4-containing reporter genes when transfected into CV-1 cells.","method":"Protein purification, cDNA cloning, sequence analysis, transfection/reporter assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 — original cloning with direct functional validation in transfection assay, highly cited foundational paper","pmids":["8463279"],"is_preprint":false},{"year":1994,"finding":"NR5A1 (Ad4BP/SF-1) regulates the Müllerian inhibiting substance (MIS) gene by binding to a conserved upstream regulatory element in primary Sertoli cells. In heterologous HeLa cells, MIS activation by SF-1 requires removal of the SF-1 ligand-binding domain, implicating a Sertoli cell-specific ligand or cofactor in regulating SF-1 transcriptional activity.","method":"Reporter gene assays in primary Sertoli cells and heterologous cells, deletion mutagenesis","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1-2 — functional dissection with domain deletion mutagenesis in relevant primary cells, highly cited","pmids":["8205615"],"is_preprint":false},{"year":1994,"finding":"NR5A1 (Ad4BP) activates transcription through distal promoter elements of human CYP11A and bovine CYP11B genes containing Ad4 binding sites, in a steroidogenic cell-specific and cAMP-stimulated manner; the two distal promoters showed different requirements for basal promoter interactions.","method":"Transfection with CAT reporter constructs, promoter deletion analysis, cAMP stimulation","journal":"Journal of biochemistry","confidence":"Medium","confidence_rationale":"Tier 2 — cell-based reporter assays with promoter mapping in steroidogenic cells","pmids":["7798178"],"is_preprint":false},{"year":1994,"finding":"Ad4BP/SF-1 exhibits sexually dimorphic expression in fetal rat gonads: high levels in fetal and prepubertal testes (somatic cells including Sertoli and Leydig cells) and low levels in fetal ovaries, with expression increasing in ovaries postnatally. Expression in gonads correlates temporally with MIS and steroidogenic P450 gene expression, suggesting a direct regulatory role in sex-specific gene activation during gonadal differentiation.","method":"Immunohistochemistry, RT-PCR, developmental staging across prenatal and postnatal rat tissues","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 — systematic developmental expression with multiple orthogonal methods across multiple stages, highly cited","pmids":["7607070"],"is_preprint":false},{"year":1995,"finding":"Mouse ELP gene (encoding Ad4BP/SF-1) produces four isoforms (ELP1, ELP2, ELP3, Ad4BP/SF-1) through alternative promoter usage and differential splicing. ELP1 (lacking the ligand-binding domain region III) functions as a transcriptional repressor, while isoforms retaining both DNA-binding and ligand-binding domains (ELP2, ELP3, Ad4BP/SF-1) function as transactivators.","method":"cDNA library screening, genomic structure analysis, RT-PCR, reporter gene assays","journal":"Journal of biochemistry","confidence":"Medium","confidence_rationale":"Tier 2 — functional characterization of isoforms with reporter assays, domain structure linked to function","pmids":["8543574"],"is_preprint":false},{"year":1995,"finding":"NR5A1 (SF-1) knockout mice completely lack adrenal glands and gonads (agenesis), have persistent Müllerian structures in genetic males, and die shortly after birth with diminished corticosterone. P450scc expression in the placenta is unaffected by SF-1 absence, indicating tissue-context-dependent roles. ELP transcripts could not be detected in any mouse tissue, confirming the phenotype reflects absent SF-1.","method":"Gene targeting/knockout mice, serum hormone measurements, RT-PCR, phenotypic analysis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1-2 — genetic loss-of-function with defined organ agenesis phenotype, highly cited foundational study","pmids":["7479914"],"is_preprint":false},{"year":1996,"finding":"Ad4BP/SF-1 gene is controlled by an autoregulatory mechanism in which Ad4BP/SF-1 itself functions as the dominant transcription factor driving its own expression (autoregulation of the mammalian Ftz-F1 gene). SF-1 is also expressed in pituitary gonadotrophs and ventromedial hypothalamic nucleus in addition to steroidogenic endocrine tissues.","method":"Promoter analysis, transfection assays, in situ hybridization, immunohistochemistry","journal":"FASEB journal","confidence":"Medium","confidence_rationale":"Tier 2 — autoregulation demonstrated by reporter assays with SF-1 expression vectors","pmids":["9002548"],"is_preprint":false},{"year":1997,"finding":"NR5A1 (SF-1) is an essential transcriptional regulator of steroidogenic enzyme genes (CYP11A1, CYP11B1, CYP17A1, CYP21A2, CYP19A1) and other endocrine genes through direct binding to Ad4/SF-1 response elements; SF-1 functions at all levels of the hypothalamic-pituitary-adrenal and gonadal axes.","method":"Review integrating reporter assays, knockout mouse phenotypes, promoter binding studies from multiple laboratories","journal":"Endocrine reviews","confidence":"High","confidence_rationale":"Tier 1-2 — synthesis of multiple independent functional studies, highly cited","pmids":["9183568"],"is_preprint":false},{"year":1998,"finding":"SF-1 (NR5A1) directly interacts with SOX9 via its C-terminal region; SOX9 binds the AMH promoter through a canonical SOX site and cooperates synergistically with SF-1 to activate AMH gene transcription in Sertoli cells, with the interaction demonstrated by in vitro and in vivo protein-binding assays.","method":"Co-immunoprecipitation, GST pulldown, co-transfection reporter assays, EMSA","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 — reciprocal protein interaction assays combined with functional synergy assays, highly cited","pmids":["9774680"],"is_preprint":false},{"year":1998,"finding":"WT1 (-KTS isoforms) associates directly with SF-1 and synergizes with it to activate MIS transcription; DAX-1 (NR0B1) antagonizes this WT1/SF-1 synergy through a direct interaction with SF-1. WT1 missense mutations associated with Denys-Drash syndrome (male pseudohermaphroditism) fail to synergize with SF-1.","method":"Co-immunoprecipitation, GST pulldown, co-transfection reporter assays, dominant-negative experiments","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1-2 — direct physical interaction demonstrated by multiple methods with functional epistasis, highly cited","pmids":["9590178"],"is_preprint":false},{"year":1999,"finding":"Ptx1 (Pitx1) directly interacts with the N-terminal half of SF-1 through its C-terminus, enhancing SF-1 transcriptional activity to levels equivalent to a constitutively active SF-1 mutant. This interaction occurs on SF-1 target gene promoters (LHβ and MIS) and may mimic the functional effect of a ligand binding to SF-1's ligand-binding domain, providing a developmental mechanism to bypass SF-1 ligand dependence.","method":"Co-immunoprecipitation, GST pulldown, co-transfection reporter assays, domain mapping","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1-2 — direct physical interaction mapped to specific domains with functional consequence, moderate evidence","pmids":["10369682"],"is_preprint":false},{"year":1999,"finding":"A heterozygous loss-of-function mutation in NR5A1 (G35E in the P-box of the DNA-binding domain) causes XY sex reversal and adrenal failure in humans, establishing that haploinsufficiency of SF-1 is sufficient to cause severe endocrine phenotypes in humans.","method":"Sequencing, in vitro functional assay of mutant protein DNA binding and transactivation","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 2 — human loss-of-function with functional characterization of mutant, highly cited","pmids":["10369247"],"is_preprint":false},{"year":1999,"finding":"GATA-4 directly interacts with SF-1 (NR5A1) through its zinc finger region to synergistically activate MIS promoter transcription. This synergy does not require GATA-4 DNA binding and is also observed with other GATA family members on multiple SF-1 target genes, revealing a protein-protein interaction mechanism for SF-1 co-regulation.","method":"GST pulldown, co-immunoprecipitation, co-transfection reporter assays, domain mutagenesis","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 1-2 — direct protein interaction with domain mapping and functional synergy validated across multiple promoters","pmids":["10446911"],"is_preprint":false},{"year":1999,"finding":"SF-1 transcriptional activity depends on phosphorylation of serine-203 (Ser-203) in the AF-1 activation domain by the MAPK signaling pathway. This phosphorylation is required for maximal SF-1-mediated transcription and for interaction with general nuclear receptor cofactors, coupling extracellular signals to steroid hormone synthesis.","method":"Phospho-specific antibodies, mutagenesis, kinase assays, co-immunoprecipitation with cofactors, reporter gene assays","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 1-2 — phosphorylation site identified by mutagenesis, kinase pathway linked, cofactor recruitment assayed, highly cited","pmids":["10230405"],"is_preprint":false},{"year":2000,"finding":"Loss of SF-1 in knockout mice profoundly disrupts the cellular architecture of the ventromedial hypothalamic nucleus (VMH) from early stages, preventing normal exclusion of GABA/GAD67-immunoreactive cells and causing aberrant distribution of NPY, ERα, and galanin-expressing cells, demonstrating that SF-1 plays a direct role in determining the distribution and phenotypes of hypothalamic neurons.","method":"SF-1 knockout mouse analysis, immunohistochemistry for multiple neuronal markers at multiple developmental stages","journal":"The Journal of comparative neurology","confidence":"High","confidence_rationale":"Tier 2 — genetic loss-of-function with multiple defined cellular phenotypes in the CNS","pmids":["10880989"],"is_preprint":false},{"year":2000,"finding":"ACTH resistance in Y1 adrenocortical mutant cells results from impaired SF-1 (NR5A1) transcriptional activation function rather than altered DNA binding or altered cofactor (WT1, CBP/p300, SRC-1) levels; adding a VP16 activation domain to SF-1 restores transcriptional activity, and multiple SF-1 target genes (MC2R, CYP11B1, StAR) show differential SF-1 dependence.","method":"Reporter gene assays, EMSA, Western blot, 5'-deletion analysis, VP16 fusion rescue","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"Medium","confidence_rationale":"Tier 2 — functional dissection in adrenocortical mutant cell model with multiple orthogonal approaches","pmids":["10770490"],"is_preprint":false},{"year":2000,"finding":"A homozygous NR5A1 mutation (R92Q) in the A-box secondary DNA-binding domain causes adrenal failure and 46,XY sex reversal only in homozygous state; heterozygous carriers are phenotypically normal. This contrasts with the P-box G35E mutation causing haploinsufficiency, demonstrating dose-dependent sensitivity of SF-1-dependent developmental pathways to gene dosage and A-box vs. P-box functional importance.","method":"Sequencing, functional assays of mutant proteins (DNA binding, transactivation)","journal":"The Journal of clinical endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 2 — human genetics with functional characterization revealing domain-specific effects","pmids":["11932325"],"is_preprint":false},{"year":2000,"finding":"A heterozygous R255L mutation in the SF-1 ligand-binding domain causes adrenal insufficiency in a 46,XX female without apparent ovarian defects. The R255L mutant protein cannot bind canonical DNA sequences and is transcriptionally inactive without dominant-negative activity, establishing that NR5A1 DNA binding is essential for adrenal but not ovarian development.","method":"Sequencing, EMSA (DNA binding), reporter gene transactivation assay, dominant-negative testing","journal":"American journal of human genetics","confidence":"High","confidence_rationale":"Tier 2 — human mutation with full functional characterization","pmids":["11038323"],"is_preprint":false},{"year":2003,"finding":"SF-1 is required for terminal differentiation of VMN neurons: SF-1 null mice retain VMN precursors but show misexpression of NKX2-1, absence of BDNF neurotrophin expression, and complete loss of axonal projections to the bed nucleus of stria terminalis and amygdala, demonstrating a role distinct from apoptosis-driven organ agenesis in peripheral endocrine tissues.","method":"SF-1 knockout mouse, immunohistochemistry, tract-tracing, marker expression analysis","journal":"Molecular and cellular neurosciences","confidence":"High","confidence_rationale":"Tier 2 — genetic loss-of-function with multiple defined circuit and differentiation phenotypes","pmids":["12727442"],"is_preprint":false},{"year":2003,"finding":"The G146A variation in the hinge region of human Ad4BP/SF-1 shows slightly diminished transactivation on CYP11A and CYP19 promoters but does not affect protein expression, stability, dominant-negative activity, co-regulator interaction pattern, or subnuclear distribution, classifying it as a nonsynonymous SNP with possible clinical relevance in adrenal disease populations.","method":"Reporter gene assays, Western blot, subnuclear localization, co-regulator interaction assays","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2-3 — functional characterization with multiple assays, single laboratory","pmids":["14623279"],"is_preprint":false},{"year":2005,"finding":"Phosphatidylinositol lipids (phosphatidylinositol 4,5-bisphosphate and related species) occupy the ligand-binding pocket of SF-1 and LRH-1 as identified by crystal structures; ligand binding is required for maximal receptor activity. Evolutionary analysis shows ligand binding is the ancestral state of NR5A receptors.","method":"X-ray crystallography, biochemical binding assays, functional reporter assays","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1 — crystal structure plus biochemical and functional validation, highly cited","pmids":["15707893"],"is_preprint":false},{"year":2005,"finding":"Mouse Polycomb group protein M33 directly binds the Ad4BP/SF-1 (Nr5a1) gene locus (demonstrated by chromatin immunoprecipitation) and is required for normal Ad4BP/SF-1 expression. M33 knockout mice show significantly reduced Ad4BP/SF-1 protein levels and display adrenal and splenic defects phenotypically similar to Ad4BP/SF-1 knockout mice, establishing M33 as a direct upstream epigenetic regulator of Nr5a1.","method":"Chromatin immunoprecipitation, Western blot, immunohistochemistry, RT-PCR, knockout mouse phenotypic analysis","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 — ChIP demonstrating direct binding plus genetic epistasis via knockout phenotype comparison","pmids":["15899914"],"is_preprint":false},{"year":2007,"finding":"Cited2 cooperates with Wt1 as a co-factor to stimulate SF-1 (Nr5a1) expression in the adrenogonadal primordium above the threshold required for adrenal cortex specification. Genetic and molecular evidence shows that Cited2 interacts with Wt1 to directly regulate Nr5a1 levels; adrenal defects in Sf-1/Cited2 double heterozygous embryos confirm pathway co-linearity.","method":"Genetic epistasis (double heterozygous mice), molecular interaction assays, promoter analysis, developmental staging","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 — genetic epistasis combined with molecular evidence across multiple mutant backgrounds","pmids":["17537799"],"is_preprint":false},{"year":2007,"finding":"Increased SF-1 (NR5A1) dosage by itself drives adrenocortical cell proliferation through concerted effects on the cell cycle and apoptosis in a transcriptional activity-dependent manner. In mice, increased Sf-1 dosage produces adrenocortical hyperplasia and gonadal marker-expressing tumors from the subcapsular region. SF-1 increases its own binding to the FATE1 promoter and modulates cofactor recruitment in a dosage-dependent manner.","method":"Sf-1 transgenic mice, cell proliferation assays, gene expression profiling, ChIP, reporter assays","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 2 — transgenic overexpression with mechanistic follow-up by ChIP and cofactor recruitment, highly cited","pmids":["17761949"],"is_preprint":false},{"year":2007,"finding":"HDAC inhibitors (trichostatin A, valproic acid) suppress steroidogenesis by promoting SCF (Skp1/Cul1/F-box) E3 ubiquitin ligase-mediated ubiquitination and proteasomal degradation of SF-1, mediated through increased expression of SKP1A (SCF subunit). SKP1A knockdown by siRNA prevents SF-1 degradation, and SF-1 overexpression rescues steroidogenesis despite HDAC inhibition.","method":"siRNA knockdown, overexpression rescue, ubiquitination assays, Western blot, steroid measurement","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 — mechanism defined by siRNA epistasis and rescue experiments with multiple orthogonal methods","pmids":["17709382"],"is_preprint":false},{"year":2007,"finding":"SF-1 promoter activity is regulated by DNA methylation status of a CpG island flanking the SF-1 promoter and exon I region. In endometriotic stromal cells, hypomethylation of this CpG island drives aberrant SF-1 expression; methyl-CpG-binding domain protein 2 (MBD2) binds the methylated SF-1 promoter in normal endometrial cells. Demethylation by 5-aza-2'-deoxycytidine induces SF-1 expression up to 55-fold in endometrial cells.","method":"Bisulfite sequencing, 5-aza-2'-deoxycytidine treatment, luciferase reporter assays, ChIP for MBD2","journal":"The Journal of clinical endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 1-2 — methylation mechanism validated by multiple orthogonal methods including ChIP and pharmacological demethylation","pmids":["17519303"],"is_preprint":false},{"year":2008,"finding":"Crystal structure of the SF-1 ligand-binding domain (LBD) bound to exchanged phosphatidylcholine shows the phospholipid in the hormone pocket, with two surface loops (L2-3 and L11-12) surrounding the pocket entrance varying between structures depending on bound ligand. Mutations in loop L11-12 impair phospholipid exchange and diminish transcriptional activity; the disease-associated L2-3 mutation R255L similarly impairs lipid binding and SF-1 activity.","method":"X-ray crystallography, phospholipid exchange assay, reporter gene transactivation assay, site-directed mutagenesis","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 1 — crystal structure plus mutagenesis and biochemical functional validation","pmids":["18988706"],"is_preprint":false},{"year":2008,"finding":"SUMOylation of SF-1 at Lys119 (in the DNA-binding domain) markedly and selectively reduces SF-1 binding to noncanonical 'SUMO-sensitive' target gene promoters (e.g., inhibin-α), while leaving canonical target binding less affected. DNA binding and Lys119 SUMOylation appear to be mutually exclusive. SUMOylation at Lys194 (in the LBD) modestly reduces Ser203 phosphorylation and has more limited effects on SF-1 conformation and coregulator recruitment.","method":"In vitro SUMOylation, EMSA, ChIP, mutagenesis (K119R, K194R), reporter gene assays, NMR","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 — site-specific mutagenesis combined with ChIP and structural analysis","pmids":["18838537"],"is_preprint":false},{"year":2008,"finding":"SF-1 SUMOylation at K194 inhibits SF-1 transcriptional activity by reducing CDK7-mediated phosphorylation at Ser203. CDK7 preferentially binds the SUMOylation-deficient (K194R) form of SF-1; CDK7 inhibition reduces Ser203 phosphorylation. Loss of SUMOylation increases oscillatory StAR promoter occupancy and upregulates multiple steroidogenic enzyme genes.","method":"Co-immunoprecipitation (CDK7-SF-1), CDK7 inhibitor experiments, ChIP, mutagenesis, reporter gene assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 — mechanistic link between two PTMs established by co-IP, kinase inhibition, and mutagenesis","pmids":["19015234"],"is_preprint":false},{"year":2008,"finding":"PGE2 promotes coordinate binding of SF-1 to the promoters of StAR and aromatase genes in endometriotic cells, stimulating the full steroidogenic pathway from cholesterol to estradiol. COUP-TFII and WT1 suppress this pathway in normal endometrium by binding the same promoters and opposing SF-1 activity.","method":"ChIP for SF-1, COUP-TFII and WT1 at endogenous gene promoters; reporter assays; steroid measurements","journal":"The Journal of clinical endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 2 — ChIP at endogenous promoters combined with functional reporter and steroid production assays","pmids":["19001523"],"is_preprint":false},{"year":2009,"finding":"Heterozygous missense mutations in NR5A1 found in men with severe spermatogenic failure impair NR5A1 transactivational activity as shown by functional studies, establishing NR5A1 mutations as a cause of male infertility (~4% of unexplained severe spermatogenic failure).","method":"Sequencing, luciferase reporter transactivation assays of mutant proteins","journal":"American journal of human genetics","confidence":"Medium","confidence_rationale":"Tier 2-3 — human genetics with functional characterization of mutants","pmids":["20887963"],"is_preprint":false},{"year":2011,"finding":"SF-1 (NR5A1) localizes to centrosomes in addition to the nucleus. SF-1 depletion by shRNA causes centrosome over-duplication, aberrant mitosis, and genomic instability, reducing cell numbers. A centrosome localization signal was identified in SF-1; both wild-type SF-1 and transcription-defective SF-1-G35E rescue centrosome amplification, indicating a non-genomic/non-transcriptional centrosomal function of SF-1.","method":"Immunofluorescence/co-localization, shRNA knockdown, centrosome counting, cell cycle analysis, mutagenesis","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 — localization confirmed by imaging, functional rescue with transcription-dead mutant establishes non-transcriptional mechanism","pmids":["21566663"],"is_preprint":false},{"year":2011,"finding":"Ubc9 (SUMO E2 conjugase) and PIAS1 (SUMO E3 ligase) both physically interact with SF-1 and paradoxically function as coactivators—independent of their sumoylation enzymatic activity—for SF-1-mediated transcription of CYP17, CYP11A1, and CYP11B1 but not CYP11B2 in adrenocortical cells. SF-1, Ubc9, and PIAS1 are co-recruited to the endogenous CYP17 promoter.","method":"Co-immunoprecipitation, siRNA knockdown, ChIP, reporter gene assays, sumoylation-inactive mutants","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods including ChIP at endogenous locus and siRNA epistasis","pmids":["21467194"],"is_preprint":false},{"year":2014,"finding":"Crystal structures of human NR5A1 (SF-1) LBD bound to PIP2 and PIP3 reveal that phosphoinositide hydrophobic tails are sequestered in the hormone pocket while the head groups are fully solvent-exposed and organize the receptor architecture at the pocket entrance. PIP3 (highest-affinity ligand) stabilizes the coactivator binding groove and increases coactivator peptide recruitment. The PIP3-stabilized surface on SF-1 coincides with the predicted DAX-1 corepressor binding site and harbors disease-associated missense mutations.","method":"X-ray crystallography, surface plasmon resonance/binding affinity assays, coactivator peptide recruitment assays","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1 — crystal structure with functional validation including binding affinity and coactivator recruitment","pmids":["25288771"],"is_preprint":false},{"year":2014,"finding":"NR5A1 (SF-1) is required for human spleen development via transactivation of TLX1, a transcription factor essential for murine spleen organogenesis. A recessive SF-1 mutation (R103Q) reduces SF-1 transactivation of the TLX1 promoter and impairs steroidogenic gene activation, but does not affect SF-1/SRY co-activation of the SOX9 testis-development enhancer (TESCO), revealing functional separation of SF-1 activities.","method":"Human genetics, reporter gene assays for TLX1, steroidogenic gene, and TESCO promoters; functional mutation analysis","journal":"The Journal of clinical investigation","confidence":"High","confidence_rationale":"Tier 2 — human loss-of-function mutation with mechanistic promoter dissection across multiple targets","pmids":["24905461"],"is_preprint":false},{"year":2014,"finding":"Prenatal nicotine exposure suppresses SF-1 expression and its transcriptional activity in fetal adrenal glands by decreasing histone H3K9 and H3K14 acetylation at the SF-1 promoter region via enhanced HDAC2 expression, reducing SF-1 binding to target gene promoters (e.g., StAR). TSA treatment reverses nicotine-mediated SF-1 suppression.","method":"ChIP for histone acetylation marks, bisulfite sequencing, co-IP for SF-1/StAR interaction, HDAC inhibitor rescue","journal":"Toxicology and applied pharmacology","confidence":"Medium","confidence_rationale":"Tier 2 — multiple epigenetic assays with pharmacological rescue, but primarily in a toxicological model","pmids":["24709674"],"is_preprint":false},{"year":2014,"finding":"NR5A1 prevents centriole splitting by inhibiting centrosomal DNA-PK activation. SF-1 depletion leads to aberrant GSK3β phosphorylation during G1 phase and β-catenin accumulation specifically at the centrosome (not the nucleus). DNA-PK inhibitor vanillin reverses these phenotypes. SF-1 interacts with cyclin A in the centrosome but not in the nucleus, and both full-length and DNA-binding-domain-deleted SF-1 rescue centriole splitting.","method":"Immunofluorescence, co-immunoprecipitation, shRNA depletion, DNA-PK inhibitor treatment, centriole counting","journal":"Cell communication and signaling","confidence":"High","confidence_rationale":"Tier 2 — mechanistic centrosomal pathway defined by co-IP, pharmacological inhibition, and domain-deletion rescue","pmids":["25421435"],"is_preprint":false},{"year":2016,"finding":"SF-1 deficiency in Leydig cells causes lipid accumulation through transcriptional suppression of STAR and CYP11A1, both required for mitochondrial cholesterol processing. Knockdown of either StAR or CYP11A1 individually induces lipid accumulation, and combined knockdown has an additive effect, establishing that SF-1-driven StAR/CYP11A1 expression is required to prevent cholesterol buildup.","method":"Heterozygous SF-1 knockout mice, Leydig cell line siRNA knockdown, lipid staining, steroid measurements, immunoblotting","journal":"Endocrine","confidence":"High","confidence_rationale":"Tier 2 — genetic model plus mechanistic RNAi epistasis with defined cellular readout","pmids":["27455990"],"is_preprint":false},{"year":2016,"finding":"In Nile tilapia, CRISPR/Cas9-mediated sf-1 (nr5a1) knockout results in gonadal dysgenesis, reduced steroidogenic cells, and haploinsufficiency (sf-1+/-) causes female-to-male sex reversal in XX fish. SF-1 deficiency decreased estradiol and CYP19A1/FOXL2 expression in XX fish, while 17α-methyltestosterone treatment rescued the XY gonadal phenotype, establishing SF-1's conserved role in teleost gonadal sex determination and steroidogenesis.","method":"CRISPR/Cas9 knockout, hormone rescue, immunohistochemistry, gene expression analysis","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 2 — genetic loss-of-function with pharmacological rescue and defined molecular pathway","pmids":["27046435"],"is_preprint":false},{"year":2018,"finding":"Ad4BP/SF-1 directly regulates cholesterogenic genes in steroidogenic cells (identified by ChIP-seq) and controls Hummr, a candidate mediator of cholesterol transport from endoplasmic reticulum to mitochondria, thereby coordinating cholesterol synthesis with steroidogenesis. This extends SF-1's role from steroidogenic enzyme gene regulation to the broader metabolic supply of the steroid substrate.","method":"ChIP-seq, gene expression profiling, functional validation of target genes","journal":"Communications biology","confidence":"Medium","confidence_rationale":"Tier 2 — genome-wide ChIP-seq for target identification with functional follow-up","pmids":["30271905"],"is_preprint":false},{"year":2018,"finding":"Insulin regulates adrenal steroidogenesis by increasing SF-1 protein and mRNA expression through inhibition of FoxO1; overexpression of FoxO1 suppresses SF-1 and its steroidogenic target genes, and hyperactivation of insulin signaling in mice increases adrenal SF-1 expression along with elevated aldosterone and corticosterone levels.","method":"In vitro insulin treatment, streptozotocin mouse model, FoxO1 overexpression, Western blot, hormone measurement","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2-3 — in vitro and in vivo evidence for insulin/FoxO1 pathway, mechanism partially defined","pmids":["29567944"],"is_preprint":false},{"year":2019,"finding":"NR5A1 together with GATA4 is sufficient to reprogram human fibroblasts into induced Sertoli-like cells (hiSCs). These hiSCs exhibit transcriptome profiles and functional properties (support of spermatogonia viability, suppression of T-lymphocyte proliferation, xenograft immune protection) similar to primary human Sertoli cells, demonstrating that NR5A1 is a master reprogramming factor for Sertoli cell identity.","method":"Transcription factor-mediated cellular reprogramming, transcriptome profiling, functional co-culture assays, immune protection assays","journal":"eLife","confidence":"High","confidence_rationale":"Tier 2 — direct reprogramming with functional validation across multiple Sertoli cell properties","pmids":["31710289"],"is_preprint":false},{"year":2019,"finding":"Sertoli cell-specific deletion of Nr5a1 at E14.5 (post-sex determination) leads to Sertoli cell apoptosis beginning at E15, associated with reduced MDM2 protein levels and elevated TP53, suggesting NR5A1 directly regulates MDM2 expression to suppress the TP53 apoptotic pathway. Loss of Sertoli and germ cells disrupts seminiferous cords by E18.5.","method":"Amh-Cre conditional knockout, TUNEL apoptosis assay, Western blot for MDM2/TP53, histological analysis","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 — conditional KO with defined cellular phenotype and pathway marker analysis, MDM2 regulation inferred","pmids":["30872705"],"is_preprint":false},{"year":2021,"finding":"In zebrafish, nr5a1a and nr5a1b co-orthologs partition ancestral NR5A1 functions: nr5a1a is required for interrenal (adrenal) development and Leydig cell formation, while nr5a1b is required for gonad maintenance. Single-cell RNA-seq identified nr5a1a-expressing steroidogenic precursor cells co-expressing Cxcl12a at 1 dpf, mirroring the mammalian adrenal-gonadal primordium.","method":"CRISPR/Cas9 knockout of both ohnologs, single-cell RNA-seq, RNA-seq, immunohistochemistry, hormone measurements","journal":"Genetics","confidence":"High","confidence_rationale":"Tier 2 — genetic dissection of subfunctionalization using multiple orthogonal methods including scRNA-seq","pmids":["33724412"],"is_preprint":false},{"year":2022,"finding":"In the dragon lizard Pogona vitticeps, sex-specific alternative splicing of nr5a1 alleles on W and Z sex chromosomes determines sex: ZZ males produce two functional NR5A1 isoforms, while ZW females produce 16 isoforms mostly containing premature stop codons from the W-borne allele that likely generate truncated proteins with intact DNA-binding domains acting as competitive inhibitors of full-length NR5A1, thereby suppressing testis determination.","method":"Long-read RNA sequencing, isoform characterization, sex chromosome allele-specific expression analysis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 3 — molecular characterization of isoforms without direct functional protein assays, mechanistic model is hypothetical","pmids":["35074916"],"is_preprint":false},{"year":2003,"finding":"Tpit (T-box transcription factor) trans-represses SF-1-mediated gonadotroph differentiation; inactivation of Tpit in the pituitary intermediate lobe results in loss of POMC-expressing cells replaced by gonadotrophs, and gain-of-function Tpit transgenes suppress gonadotroph development, establishing antagonism between Tpit and SF-1 in pituitary lineage determination.","method":"Tpit knockout mice, Tpit transgenic mice, immunohistochemistry, reporter gene assays","journal":"Genes & development","confidence":"Medium","confidence_rationale":"Tier 2 — genetic epistasis with both loss- and gain-of-function models","pmids":["12651892"],"is_preprint":false}],"current_model":"NR5A1 (SF-1/Ad4BP) is a zinc-finger orphan nuclear receptor that directly binds phosphatidylinositol lipids (particularly PIP2/PIP3) in its ligand-binding pocket to stabilize the coactivator-binding surface; its transcriptional activity is modulated by MAPK-dependent phosphorylation of Ser-203 (enhancing cofactor recruitment), SUMOylation at Lys119 (selectively reducing DNA binding at noncanonical targets) and Lys194 (inhibiting CDK7-mediated Ser-203 phosphorylation), and SCF-mediated ubiquitination/degradation; it directly interacts with co-regulators including SOX9, WT1, GATA-4, DAX-1, Ptx1, Ubc9, and PIAS1 to drive tissue-specific transcription of steroidogenic enzyme genes (CYP11A1, CYP11B1, CYP17A1, CYP19A1), cholesterol transport genes (StAR, Hummr), and developmental regulators (MIS/AMH, TLX1, SOX9 via TESCO); in addition to its nuclear transcriptional role, SF-1 localizes to centrosomes where it non-transcriptionally suppresses DNA-PK-driven centriole splitting and β-catenin accumulation to maintain genomic stability; epigenetic control of the NR5A1 gene itself involves Polycomb (M33), Wt1/Cited2-mediated dosage control, and CpG island methylation; collectively, NR5A1 functions as a master coordinator of adrenal/gonadal organogenesis, steroidogenesis, hypothalamic neuronal differentiation, spleen development, and Sertoli cell identity."},"narrative":{"teleology":[{"year":1993,"claim":"Identification of Ad4BP/SF-1 as a steroidogenic tissue-specific transcription factor containing a zinc-finger DNA-binding domain and a ligand-binding domain established that a single nuclear receptor directly activated steroidogenic P-450 gene promoters through Ad4 cis-elements.","evidence":"Protein purification from bovine adrenal cortex, cDNA cloning, reporter assays in CV-1 cells","pmids":["8463279"],"confidence":"High","gaps":["No ligand identified","Upstream regulators unknown","In vivo requirement not yet demonstrated"]},{"year":1994,"claim":"Demonstration that SF-1 directly regulated the MIS/AMH gene and showed sexually dimorphic expression in fetal gonads established it as a key regulator of sex-specific gene activation during gonadal differentiation, beyond steroidogenic enzymes alone.","evidence":"Reporter assays in primary Sertoli cells with domain deletions; immunohistochemistry and RT-PCR across developmental stages in rat","pmids":["8205615","7607070"],"confidence":"High","gaps":["Identity of the Sertoli cell-specific cofactor or ligand required for LBD-dependent activation unknown","Mechanism of sex-dimorphic expression regulation unknown"]},{"year":1995,"claim":"SF-1 knockout mice lacking adrenal glands and gonads proved that SF-1 is indispensable for organogenesis of the primary steroidogenic organs, resolving whether it was merely a modulator or an essential developmental factor.","evidence":"Gene targeting/knockout mice with complete adrenal and gonadal agenesis, neonatal lethality","pmids":["7479914"],"confidence":"High","gaps":["Whether haploinsufficiency causes disease in humans unknown","Mechanism of organ agenesis (apoptosis vs. specification failure) not resolved"]},{"year":1998,"claim":"Identification of direct physical interactions between SF-1 and tissue-specific transcription factors SOX9, WT1, and DAX-1 revealed how SF-1 achieves target gene selectivity through combinatorial cofactor recruitment, with DAX-1 functioning as a dedicated antagonist.","evidence":"Co-immunoprecipitation, GST pulldown, and synergy/antagonism in reporter assays on AMH and MIS promoters","pmids":["9774680","9590178"],"confidence":"High","gaps":["Structural basis of cofactor selectivity unknown","Whether these interactions are regulated by post-translational modifications unknown"]},{"year":1999,"claim":"Discovery that MAPK-dependent phosphorylation of Ser-203 is required for maximal SF-1 transcriptional activity and cofactor recruitment established a direct signaling mechanism coupling extracellular stimuli to steroidogenic gene output.","evidence":"Phospho-specific antibodies, S203A mutagenesis, kinase assays, cofactor co-IP, reporter assays","pmids":["10230405"],"confidence":"High","gaps":["Whether other kinases target Ser-203 in vivo unknown","Crosstalk with SUMOylation not yet explored"]},{"year":1999,"claim":"Human heterozygous NR5A1 mutations (G35E) causing XY sex reversal and adrenal failure proved that SF-1 haploinsufficiency is pathogenic, establishing NR5A1 as a disease gene for disorders of sex development and adrenal insufficiency.","evidence":"Patient sequencing with functional characterization of mutant DNA binding and transactivation","pmids":["10369247"],"confidence":"High","gaps":["Genotype-phenotype correlation across different domains incomplete","Mechanism of variable penetrance unknown"]},{"year":2000,"claim":"Demonstration that SF-1 null mice lose VMH neuronal architecture and marker expression established a CNS developmental role for SF-1 distinct from its peripheral steroidogenic function, expanding its scope to hypothalamic neuron specification.","evidence":"SF-1 knockout mouse analysis with immunohistochemistry for multiple neuronal markers","pmids":["10880989"],"confidence":"High","gaps":["Direct transcriptional targets in VMH neurons unknown","Whether SF-1 acts cell-autonomously in neurons not definitively established"]},{"year":2005,"claim":"Crystal structures revealing phosphatidylinositol lipids occupying the SF-1 ligand-binding pocket resolved the long-standing question of whether this 'orphan' receptor had a ligand and identified phospholipids as endogenous regulators of its activity.","evidence":"X-ray crystallography of SF-1 LBD with biochemical binding and reporter assays","pmids":["15707893"],"confidence":"High","gaps":["Whether PIP occupancy is dynamically regulated in vivo unknown","Relative contribution of different PIP species to SF-1 activity in specific tissues unresolved"]},{"year":2007,"claim":"Convergent discoveries of upstream regulatory mechanisms—Cited2/Wt1 dosage control of Nr5a1 expression, CpG island methylation of the SF-1 promoter, and SCF-mediated proteasomal degradation—revealed that SF-1 protein levels are tightly controlled at transcriptional, epigenetic, and post-translational levels, explaining dosage sensitivity in disease.","evidence":"Double-heterozygous epistasis in mice (Cited2/Sf-1); bisulfite sequencing and MBD2 ChIP in endometrial cells; siRNA knockdown of SKP1A preventing SF-1 degradation","pmids":["17537799","17519303","17709382"],"confidence":"High","gaps":["How these three regulatory layers are integrated in vivo unknown","Whether SCF targeting is tissue-specific not determined"]},{"year":2008,"claim":"Site-specific SUMOylation at Lys119 and Lys194 was shown to selectively modulate SF-1 DNA-binding specificity and CDK7-dependent Ser-203 phosphorylation respectively, establishing a post-translational modification crosstalk network that tunes target gene selectivity.","evidence":"In vitro SUMOylation, EMSA, ChIP, NMR, CDK7 co-IP, mutagenesis (K119R, K194R)","pmids":["18838537","19015234"],"confidence":"High","gaps":["In vivo dynamics of SUMOylation/deSUMOylation cycles not characterized","Identity of the SUMO protease(s) acting on SF-1 unknown"]},{"year":2011,"claim":"Discovery of SF-1 localization to centrosomes and a non-transcriptional function in suppressing centriole over-duplication—rescued by the transcription-dead G35E mutant—revealed an unexpected moonlighting role in mitotic fidelity.","evidence":"Immunofluorescence co-localization, shRNA knockdown causing centrosome amplification, rescue with DNA-binding-defective mutant","pmids":["21566663"],"confidence":"High","gaps":["Centrosome-targeting mechanism not fully defined","Whether centrosomal function contributes to disease phenotypes unknown"]},{"year":2014,"claim":"High-resolution structures of SF-1 LBD bound to PIP2/PIP3 revealed that PIP3 is the highest-affinity ligand stabilizing the coactivator groove, and that disease-associated mutations map to this surface, mechanistically linking lipid sensing to cofactor recruitment and pathogenesis.","evidence":"X-ray crystallography, surface plasmon resonance, coactivator peptide recruitment assays","pmids":["25288771"],"confidence":"High","gaps":["Whether PIP3 binding is regulated by PI3K signaling in steroidogenic cells not shown","No structure of full-length SF-1 with cofactors available"]},{"year":2014,"claim":"Mechanistic dissection of the centrosomal pathway showed SF-1 suppresses DNA-PK activation at centrosomes, preventing GSK3β phosphorylation and β-catenin accumulation that drive centriole splitting, defining a specific non-transcriptional signaling cascade.","evidence":"Co-IP, DNA-PK inhibitor rescue, shRNA, domain-deletion constructs","pmids":["25421435"],"confidence":"High","gaps":["Direct molecular target of SF-1 at the centrosome (how it inhibits DNA-PK) not identified","Relevance to adrenocortical tumorigenesis not tested"]},{"year":2019,"claim":"NR5A1 with GATA4 was shown to be sufficient to reprogram human fibroblasts into functional Sertoli-like cells, establishing NR5A1 as a master identity factor for the Sertoli lineage and demonstrating its potential in regenerative medicine.","evidence":"Transcription factor-mediated reprogramming, transcriptome profiling, spermatogonia co-culture, immune protection assays","pmids":["31710289"],"confidence":"High","gaps":["Whether reprogrammed cells maintain long-term stability unknown","Chromatin remodeling mechanisms during reprogramming not defined"]},{"year":null,"claim":"Key unresolved questions include how PIP3 occupancy is dynamically regulated in vivo to modulate SF-1 activity, the structural basis of full-length SF-1 interaction with its diverse cofactors, and the physiological significance of centrosomal SF-1 in adrenocortical tumorigenesis and genomic stability in vivo.","evidence":"","pmids":[],"confidence":"Low","gaps":["No in vivo evidence linking PI3K signaling to SF-1 PIP3 occupancy","No full-length SF-1 structure with cofactor complex","Centrosomal function not tested in animal disease models"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,2,7,8,9,12,13,23,32,34,41]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,1,2,27,39]},{"term_id":"GO:0008289","term_label":"lipid binding","supporting_discovery_ids":[20,26,33]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,1,8,27,31,32]},{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[31,36]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,1,2,7,8,9,12,13,27,32,34,39]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[3,5,14,18,22,38,41,43]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[13,28,40]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[7,29,37,39]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[24,27,28]}],"complexes":[],"partners":["SOX9","WT1","GATA4","NR0B1","PITX1","UBE2I","PIAS1","CDK7"],"other_free_text":[]},"mechanistic_narrative":"NR5A1 (SF-1/Ad4BP) is an orphan nuclear receptor that functions as a master transcriptional regulator of adrenal and gonadal organogenesis, steroidogenesis, hypothalamic neuronal differentiation, spleen development, and Sertoli cell identity [PMID:7479914, PMID:9183568, PMID:31710289, PMID:24905461]. It binds phosphatidylinositol lipids (PIP2/PIP3) in its ligand-binding pocket to stabilize the coactivator-binding surface and recruits tissue-specific cofactors including SOX9, WT1, GATA-4, Ptx1, Ubc9, and PIAS1 to activate steroidogenic enzyme genes (CYP11A1, CYP11B1, CYP17A1, CYP19A1), cholesterol transport genes (StAR, Hummr), and developmental regulators (AMH, TLX1) [PMID:25288771, PMID:9774680, PMID:9590178, PMID:10446911, PMID:30271905]. Its transcriptional output is tuned by MAPK-dependent phosphorylation at Ser-203, SUMOylation at Lys119 (selectively reducing noncanonical DNA binding) and Lys194 (inhibiting CDK7-mediated Ser-203 phosphorylation), and SCF-mediated ubiquitin-proteasomal degradation [PMID:10230405, PMID:18838537, PMID:19015234, PMID:17709382]. Heterozygous or homozygous loss-of-function NR5A1 mutations cause 46,XY sex reversal, adrenal insufficiency, and male infertility in humans, and SF-1 additionally localizes to centrosomes where it non-transcriptionally suppresses DNA-PK-driven centriole splitting to maintain genomic stability [PMID:10369247, PMID:11932325, PMID:20887963, PMID:21566663, PMID:25421435]."},"prefetch_data":{"uniprot":{"accession":"Q13285","full_name":"Steroidogenic factor 1","aliases":["Adrenal 4-binding protein","Fushi tarazu factor homolog 1","Nuclear receptor subfamily 5 group A member 1","Steroid hormone receptor Ad4BP"],"length_aa":461,"mass_kda":51.6,"function":"Transcriptional activator. Essential for sexual differentiation and formation of the primary steroidogenic tissues (PubMed:27378692). Binds to the Ad4 site found in the promoter region of steroidogenic P450 genes such as CYP11A, CYP11B and CYP21B. Also regulates the AMH/Muellerian inhibiting substance gene as well as the AHCH and STAR genes. 5'-YCAAGGYC-3' and 5'-RRAGGTCA-3' are the consensus sequences for the recognition by NR5A1 (PubMed:27378692). The SFPQ-NONO-NR5A1 complex binds to the CYP17 promoter and regulates basal and cAMP-dependent transcriptional activity. Binds phosphatidylcholine (By similarity). Binds phospholipids with a phosphatidylinositol (PI) headgroup, in particular PI(3,4)P2 and PI(3,4,5)P3. Activated by the phosphorylation of NR5A1 by HIPK3 leading to increased steroidogenic gene expression upon cAMP signaling pathway stimulation","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q13285/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/NR5A1","classification":"Not Classified","n_dependent_lines":7,"n_total_lines":1208,"dependency_fraction":0.005794701986754967},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"CAPZB","stoichiometry":0.2},{"gene":"SSB","stoichiometry":0.2},{"gene":"U2AF2","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/NR5A1","total_profiled":1310},"omim":[{"mim_id":"620472","title":"TRAFFICKING PROTEIN PARTICLE COMPLEX, SUBUNIT 2B; TRAPPC2B","url":"https://www.omim.org/entry/620472"},{"mim_id":"620006","title":"RAD54-LIKE 2; RAD54L2","url":"https://www.omim.org/entry/620006"},{"mim_id":"617480","title":"46,XX SEX REVERSAL 4; SRXX4","url":"https://www.omim.org/entry/617480"},{"mim_id":"617362","title":"DEAH-BOX HELICASE 37; DHX37","url":"https://www.omim.org/entry/617362"},{"mim_id":"615549","title":"ARMADILLO REPEAT-CONTAINING PROTEIN 5; ARMC5","url":"https://www.omim.org/entry/615549"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Group enriched","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"adrenal gland","ntpm":182.1},{"tissue":"lymphoid tissue","ntpm":136.6}],"url":"https://www.proteinatlas.org/search/NR5A1"},"hgnc":{"alias_symbol":["FTZ1","SF-1","ELP","AD4BP","hSF-1","SF1"],"prev_symbol":["FTZF1"]},"alphafold":{"accession":"Q13285","domains":[{"cath_id":"3.30.50.10","chopping":"21-113","consensus_level":"high","plddt":89.3052,"start":21,"end":113},{"cath_id":"1.10.565.10","chopping":"224-248_257-458","consensus_level":"high","plddt":91.9197,"start":224,"end":458}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q13285","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q13285-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q13285-F1-predicted_aligned_error_v6.png","plddt_mean":77.81},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=NR5A1","jax_strain_url":"https://www.jax.org/strain/search?query=NR5A1"},"sequence":{"accession":"Q13285","fasta_url":"https://rest.uniprot.org/uniprotkb/Q13285.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q13285/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q13285"}},"corpus_meta":[{"pmid":"8463279","id":"PMC_8463279","title":"Ad4BP regulating steroidogenic P-450 gene is a member of steroid hormone receptor superfamily.","date":"1993","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/8463279","citation_count":321,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"19246354","id":"PMC_19246354","title":"Mutations in NR5A1 associated with ovarian insufficiency.","date":"2009","source":"The New England journal of medicine","url":"https://pubmed.ncbi.nlm.nih.gov/19246354","citation_count":270,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"7607070","id":"PMC_7607070","title":"Sex-dependent expression of a transcription factor, Ad4BP, regulating steroidogenic P-450 genes in the gonads during prenatal and postnatal rat development.","date":"1994","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/7607070","citation_count":227,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"14594453","id":"PMC_14594453","title":"SF-1 a key player in the development and differentiation of steroidogenic tissues.","date":"2003","source":"Nuclear receptor","url":"https://pubmed.ncbi.nlm.nih.gov/14594453","citation_count":189,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"33041740","id":"PMC_33041740","title":"Covalently adaptable elastin-like protein - hyaluronic acid (ELP - HA) hybrid hydrogels with secondary thermoresponsive crosslinking for injectable stem cell delivery.","date":"2017","source":"Advanced functional materials","url":"https://pubmed.ncbi.nlm.nih.gov/33041740","citation_count":189,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"9002548","id":"PMC_9002548","title":"Ad4BP/SF-1, a transcription factor essential for the transcription of steroidogenic cytochrome P450 genes and for the establishment of the reproductive function.","date":"1996","source":"FASEB journal : official publication of the Federation of American Societies for Experimental Biology","url":"https://pubmed.ncbi.nlm.nih.gov/9002548","citation_count":186,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"16916933","id":"PMC_16916933","title":"Heat-shock transcription factor (HSF)-1 pathway required for Caenorhabditis elegans immunity.","date":"2006","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/16916933","citation_count":181,"is_preprint":false,"source_track":"pubmed_title"},{"pmid":"26303087","id":"PMC_26303087","title":"DAX-1 (NR0B1) and steroidogenic factor-1 (SF-1, NR5A1) in human disease.","date":"2015","source":"Best practice & research. 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expression.","date":"1998","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/9590178","citation_count":461,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"25910212","id":"PMC_25910212","title":"Widespread macromolecular interaction perturbations in human genetic disorders.","date":"2015","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/25910212","citation_count":454,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"15489334","id":"PMC_15489334","title":"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).","date":"2004","source":"Genome research","url":"https://pubmed.ncbi.nlm.nih.gov/15489334","citation_count":438,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"28319085","id":"PMC_28319085","title":"Synergistic drug combinations for cancer identified in a CRISPR screen for pairwise genetic interactions.","date":"2017","source":"Nature biotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/28319085","citation_count":378,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"17190602","id":"PMC_17190602","title":"Human mRNA export machinery recruited to the 5' end of mRNA.","date":"2006","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/17190602","citation_count":374,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"7479914","id":"PMC_7479914","title":"Mice deficient in the orphan receptor steroidogenic factor 1 lack adrenal glands and gonads but express P450 side-chain-cleavage enzyme in the placenta and have normal embryonic serum levels of corticosteroids.","date":"1995","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/7479914","citation_count":373,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"15707893","id":"PMC_15707893","title":"Structural analyses reveal phosphatidyl inositols as ligands for the NR5 orphan receptors SF-1 and LRH-1.","date":"2005","source":"Cell","url":"https://pubmed.ncbi.nlm.nih.gov/15707893","citation_count":344,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"10230405","id":"PMC_10230405","title":"Phosphorylation of the nuclear receptor SF-1 modulates cofactor recruitment: integration of hormone signaling in reproduction and stress.","date":"1999","source":"Molecular cell","url":"https://pubmed.ncbi.nlm.nih.gov/10230405","citation_count":323,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"11932325","id":"PMC_11932325","title":"Gonadal determination and adrenal development are regulated by the orphan nuclear receptor steroidogenic factor-1, in a dose-dependent manner.","date":"2002","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/11932325","citation_count":214,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"10446911","id":"PMC_10446911","title":"Transcription factor GATA-4 enhances Müllerian inhibiting substance gene transcription through a direct interaction with the nuclear receptor SF-1.","date":"1999","source":"Molecular endocrinology (Baltimore, Md.)","url":"https://pubmed.ncbi.nlm.nih.gov/10446911","citation_count":201,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"20660055","id":"PMC_20660055","title":"High diagnostic and prognostic value of steroidogenic factor-1 expression in adrenal tumors.","date":"2010","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/20660055","citation_count":192,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"20887963","id":"PMC_20887963","title":"Human male infertility associated with mutations in NR5A1 encoding steroidogenic factor 1.","date":"2010","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/20887963","citation_count":191,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"17761949","id":"PMC_17761949","title":"Increased steroidogenic factor-1 dosage triggers adrenocortical cell proliferation and cancer.","date":"2007","source":"Molecular endocrinology (Baltimore, Md.)","url":"https://pubmed.ncbi.nlm.nih.gov/17761949","citation_count":180,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"11038323","id":"PMC_11038323","title":"Apparently normal ovarian differentiation in a prepubertal girl with transcriptionally inactive steroidogenic factor 1 (NR5A1/SF-1) and adrenocortical insufficiency.","date":"2000","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/11038323","citation_count":170,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"17519303","id":"PMC_17519303","title":"Transcriptional activation of steroidogenic factor-1 by hypomethylation of the 5' CpG island in endometriosis.","date":"2007","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/17519303","citation_count":164,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"19001523","id":"PMC_19001523","title":"Prostaglandin E2 via steroidogenic factor-1 coordinately regulates transcription of steroidogenic genes necessary for estrogen synthesis in endometriosis.","date":"2008","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/19001523","citation_count":161,"is_preprint":false,"source_track":"gene2pubmed"},{"pmid":"12651892","id":"PMC_12651892","title":"Tpit determines alternate fates during pituitary cell differentiation.","date":"2003","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/12651892","citation_count":160,"is_preprint":false,"source_track":"gene2pubmed"}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":47062,"output_tokens":5610,"usd":0.112668},"stage2":{"model":"claude-opus-4-6","input_tokens":9187,"output_tokens":3889,"usd":0.21474},"total_usd":0.76076,"stage1_batch_id":"msgbatch_012ZiiCUBfB62NCTQd4Bk1Jo","stage2_batch_id":"msgbatch_01Xuqq9aUHoQouS7UVGZNStZ","note":"batch pricing = 50% of standard","round2_stage1":{"model":"claude-sonnet-4-6","input_tokens":59171,"output_tokens":11713,"usd":0.176604},"round2_rules_fired":"R2","round2_stage2":{"model":"claude-opus-4-6","input_tokens":15488,"output_tokens":3749,"usd":0.256748}},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1993,\n      \"finding\": \"NR5A1 (Ad4BP/SF-1) was identified as a transcription factor belonging to the steroid hormone receptor superfamily, containing a zinc finger DNA-binding domain and a ligand-binding/dimerization domain; it specifically binds the Ad4 site in promoters of steroidogenic P-450 genes and activates their transcription in transfected CV-1 cells.\",\n      \"method\": \"cDNA cloning, protein purification, domain analysis, transient transfection/CAT reporter assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — original biochemical characterization with purification, sequencing, and functional reporter assay\",\n      \"pmids\": [\"8463279\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"Ad4BP/SF-1 is expressed in a sexually dimorphic manner in fetal gonads (high in testes, low in ovaries) and regulates steroidogenic P-450 gene expression in adrenal, testis, and ovary; its expression correlates with Müllerian inhibitory substance gene regulation, which contains a conserved Ad4-binding site.\",\n      \"method\": \"Immunohistochemistry, RT-PCR, developmental expression analysis in rats\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct localization and expression studies with functional correlation across developmental stages\",\n      \"pmids\": [\"7607070\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"Ad4BP/SF-1 activates transcription through distal promoter Ad4 sites in both CYP11A and CYP11B genes, with cAMP-stimulated activity exclusive to steroidogenic cells; two Ad4 sites in each distal promoter are required for basal and cAMP-stimulated transcriptional activation.\",\n      \"method\": \"Transient transfection, CAT reporter assays, deletion analysis of upstream promoter regions\",\n      \"journal\": \"Journal of biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — functional dissection of promoter elements with cell-type specificity demonstrated\",\n      \"pmids\": [\"7798178\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1996,\n      \"finding\": \"SF-1 null mice exhibit complete agenesis of adrenal glands and gonads, absence of gonadotroph function, and structural defects in the ventromedial hypothalamus, establishing SF-1 as essential at all levels of the hypothalamic-pituitary-steroidogenic axis; SF-1 autoregulates its own gene expression.\",\n      \"method\": \"Gene knockout (Nr5a1 null mice), histology, gene expression analysis\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function with multiple tissue-level phenotypic readouts, widely replicated\",\n      \"pmids\": [\"9002548\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"Ptx1 (Pitx1) physically interacts with the N-terminal half of SF-1 through its C-terminus, and this interaction enhances SF-1 transcriptional activity on LH-beta and MIS promoters to a level equivalent to a constitutively active SF-1 mutant, mimicking the effect of an SF-1 ligand; synergism requires SF-1 DNA binding.\",\n      \"method\": \"Co-immunoprecipitation, transient transfection/luciferase reporter assay, deletion mapping\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct physical interaction mapped plus functional epistasis with multiple SF-1 target promoters\",\n      \"pmids\": [\"10369682\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"SF-1 is essential for normal VMH development; SF-1 knockout mice show loss of VMH-specific exclusion of GABA/GAD67 cells and aberrant distribution of NPY, ERα, and galanin cells, demonstrating that SF-1 directly or indirectly controls cellular architecture of the mediobasal hypothalamus.\",\n      \"method\": \"Immunohistochemistry, SF-1 knockout mice\",\n      \"journal\": \"The Journal of comparative neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function with specific cellular phenotypic readout in a defined brain region\",\n      \"pmids\": [\"10880989\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"SF-1 is required for terminal differentiation of VMN neurons: SF-1 null mice retain VMN precursors but show misexpression of NKX2-1, absence of BDNF, and complete loss of projections to the bed nucleus of stria terminalis and amygdala.\",\n      \"method\": \"SF-1 null mouse analysis, immunohistochemistry, axonal tracing\",\n      \"journal\": \"Molecular and cellular neurosciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function with defined molecular and circuit-level phenotypes\",\n      \"pmids\": [\"12727442\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"The Polycomb group protein M33 directly binds the Ad4BP/SF-1 (Nr5a1) gene locus and is required for its expression; M33 knockout mice show significantly reduced Ad4BP/SF-1 expression and adrenal/splenic defects phenotypically similar to Ad4BP/SF-1 knockouts.\",\n      \"method\": \"Western blot, immunohistochemistry, RT-PCR, chromatin immunoprecipitation (ChIP), M33 knockout mice\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP demonstrates direct binding at Nr5a1 locus plus genetic and biochemical evidence of regulation\",\n      \"pmids\": [\"15899914\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"The transcription co-factor Cited2 interacts with Wt1 to stimulate Nr5a1 (Sf-1) expression in the adrenogonadal primordium; double heterozygous Sf-1/Cited2 mice show adrenal development defects, placing Cited2 and Wt1 upstream of Sf-1 in adrenocortical specification.\",\n      \"method\": \"Genetic epistasis (compound heterozygous mice), gene expression analysis, molecular interaction studies\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis with multiple mutant backgrounds and quantitative dosage-sensitive phenotype\",\n      \"pmids\": [\"17537799\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"HDAC inhibitors (trichostatin A, valproic acid) suppress steroidogenesis by promoting SCF E3 ubiquitin ligase (via upregulation of SKP1A)-mediated ubiquitination and proteasomal degradation of SF-1; knockdown of SKP1A rescues SF-1 levels and restores steroidogenesis.\",\n      \"method\": \"siRNA knockdown, ubiquitination assay, immunoprecipitation, Western blot, steroid measurement\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — reconstitution of degradation pathway with rescue experiments using SKP1A siRNA and SF-1 overexpression\",\n      \"pmids\": [\"17709382\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Heterozygous missense mutations in NR5A1 (V15M, M78I, G91S, L437Q) impair transcriptional activation through abnormal DNA binding (V15M, M78I, G91S) or disruption of the putative ligand-binding pocket (L437Q), and mutations V15M and M78I also alter subnuclear localization of SF-1.\",\n      \"method\": \"Transient transfection/luciferase reporter assay, subnuclear localization studies, mutational analysis\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple mutants characterized by parallel functional and localization assays\",\n      \"pmids\": [\"17200175\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"The SF-1 ligand-binding domain (LBD) can bind exogenously added phosphatidylcholine; loops L2-3 and L11-12 surrounding the entrance to the ligand-binding pocket control phospholipid exchange, and mutations in these loops impair phospholipid binding and reduce transcriptional activity, establishing phospholipids as regulatory ligands for SF-1.\",\n      \"method\": \"Crystal structure of SF-1 LBD with exchanged phosphatidylcholine, site-directed mutagenesis, phospholipid exchange assay, transactivation assay\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — crystal structure combined with mutagenesis and functional assays\",\n      \"pmids\": [\"18988706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"SUMOylation of SF-1 at Lys119 (in the DNA-binding domain) markedly and selectively reduces DNA binding to noncanonical SF-1 target genes (e.g., inhibin-alpha); sumoylation at Lys119 and DNA binding are mutually exclusive. Sumoylation at Lys194 (in the LBD) modestly reduces Ser203 phosphorylation but does not change coregulator recruitment or conformation.\",\n      \"method\": \"Biochemical sumoylation assay, EMSA, chromatin immunoprecipitation, transient transfection, structural analysis of sumoylated LBD\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal biochemical methods with endogenous promoter ChIP and structural characterization\",\n      \"pmids\": [\"18838537\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"SF-1 is selectively SUMOylated at K194 in adrenocortical cells; SUMOylation inhibits SF-1 target gene transcription by reducing CDK7-mediated phosphorylation at Ser203. CDK7 binds preferentially to the SUMOylation-deficient SF-1, and blocking SUMOylation increases occupancy at the StAR promoter and increases steroidogenic enzyme mRNA/protein levels.\",\n      \"method\": \"In vivo SUMOylation assay, co-immunoprecipitation (CDK7-SF-1), ChIP, siRNA, steroidogenic gene qRT-PCR/Western blot\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — mechanistic link between two PTMs established by direct interaction, ChIP, and multiple functional readouts\",\n      \"pmids\": [\"19015234\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"SF-1 (NR5A1) localizes to centrosomes in addition to the nucleus; SF-1 depletion causes centrosome over-duplication, aberrant mitosis, and genomic instability. A centrosome localization signal was identified in SF-1, and centrosome defects were rescued by transcription-defective SF-1-G35E, indicating a non-genomic centrosomal function.\",\n      \"method\": \"Immunofluorescence, shRNA knockdown, rescue with wild-type and mutant SF-1, centrosome counting, karyotyping\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct localization experiment with functional consequence, and rescue with transcription-dead mutant separating centrosomal from transcriptional function\",\n      \"pmids\": [\"21566663\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Ubc9 and PIAS1 physically interact with SF-1 and coactivate SF-1-mediated transcription of CYP17, CYP11A1, and CYP11B1 promoters independently of their sumoylation enzymatic activities; both are co-recruited with SF-1 to the endogenous CYP17 promoter in chromatin.\",\n      \"method\": \"Co-immunoprecipitation, transient transfection/luciferase reporter, siRNA knockdown, chromatin immunoprecipitation\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — reciprocal co-IP, ChIP, and siRNA with endogenous gene readout\",\n      \"pmids\": [\"21467194\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SF-1 at the centrosome prevents centriole splitting by inhibiting centrosomal DNA-PK activation; SF-1 depletion leads to aberrant DNA-PK activation, GSK3β phosphorylation, and β-catenin accumulation at the centrosome (not nucleus), causing centriole splitting. SF-1 interacts with cyclin A at the centrosome.\",\n      \"method\": \"Immunofluorescence, shRNA knockdown, pharmacological DNA-PK inhibition (vanillin), co-immunoprecipitation, rescue with truncated SF-1\",\n      \"journal\": \"Cell communication and signaling\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — mechanistic pathway dissected with pharmacological inhibitor rescue, domain mapping, and protein interaction\",\n      \"pmids\": [\"25421435\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Crystal structures of human NR5A1 LBD bound to PIP2 and PIP3 show that phosphoinositide lipid tails occupy the hormone pocket while the phosphorylated head groups are solvent-exposed, organizing the receptor at the pocket entrance. PIP3 (highest affinity ligand) stabilizes the coactivator binding groove and increases coactivator peptide recruitment; the PIP3-bound surface coincides with the predicted DAX-1 corepressor binding site and harbors human disease-associated missense mutations.\",\n      \"method\": \"X-ray crystallography, fluorescence polarization (ligand binding affinity), coactivator peptide recruitment assay\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — high-resolution crystal structures with functional validation of coactivator recruitment\",\n      \"pmids\": [\"25288771\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"An NR5A1 R103Q mutation found in a 46,XY-DSD patient with asplenia decreased SF-1 transactivation of TLX1 (essential for spleen development) without affecting SF-1/SRY coactivation of SOX9, establishing SF-1 as required for human spleen development via TLX1 transactivation.\",\n      \"method\": \"Patient mutation identification, luciferase transactivation assay with TLX1 and steroidogenic promoters, SF-1/SRY coactivation assay\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — promoter-specific functional dissection with a naturally occurring mutation linking SF-1 to a new target organ\",\n      \"pmids\": [\"24905461\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"SF-1 deficiency in Leydig cells suppresses expression of STAR and CYP11A1, leading to accumulation of unmetabolized cholesterol (lipid droplets); knockdown of either STAR or CYP11A1 alone induces lipid accumulation with an additive effect when both are knocked down, placing these two SF-1 direct targets as the key mediators of cholesterol utilization in Leydig cells.\",\n      \"method\": \"Heterozygous Nr5a1 knockout mice, Leydig cell line SF-1 siRNA knockdown, siRNA of STAR and CYP11A1, lipid staining, steroid measurements\",\n      \"journal\": \"Endocrine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic and siRNA loss-of-function with specific downstream target knockdown rescue experiment\",\n      \"pmids\": [\"27455990\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Ad4BP/SF-1 directly regulates cholesterogenic genes and Hummr (a candidate mediator of cholesterol transport from ER to mitochondria), in addition to steroidogenic and glycolytic genes, thereby coordinating multiple metabolic pathways required for steroid hormone synthesis.\",\n      \"method\": \"Genome-wide ChIP-seq/transcriptomics, gene expression analysis, functional pathway analysis in steroidogenic cells\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genomic identification of direct targets with functional pathway validation\",\n      \"pmids\": [\"30271905\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Mutant NR5A1 proteins found in 46,XY DSD patients show defective activation of the SOX9 TESCO enhancer; 15 of 20 SF-1 patient mutants had reduced TESCO activation, and 11 showed atypical subcellular localization, linking aberrant SF-1-mediated SOX9 regulation to DSD phenotype severity.\",\n      \"method\": \"Luciferase reporter assay (TESCO enhancer), subcellular localization studies, in silico structural analysis\",\n      \"journal\": \"Human mutation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — systematic functional characterization of multiple patient mutations on a defined enhancer\",\n      \"pmids\": [\"30067310\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Fibroblasts can be reprogrammed to human induced Sertoli-like cells (hiSCs) by forced expression of NR5A1 and GATA4 alone; hiSCs resemble primary Sertoli cells transcriptomically, support spermatogonia viability, and suppress T lymphocyte proliferation.\",\n      \"method\": \"Transcription factor-mediated reprogramming, transcriptome profiling, functional assays (spermatogonia support, T-cell suppression)\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct reprogramming with two factors, validated by transcriptomics and multiple functional assays\",\n      \"pmids\": [\"31710289\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Sertoli cell-specific deletion of Nr5a1 at E14.5 causes apoptosis of Sertoli cells by E15 via reduced MDM2 levels and consequent elevation of TP53, leading to loss of Sertoli and germ cells and disruption of seminiferous cords, while Leydig cell androgen production remains intact.\",\n      \"method\": \"Conditional Sertoli cell-specific Nr5a1 knockout (Amh-Cre), apoptosis assays (TUNEL), Western blot for MDM2 and TP53, histology\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — cell-type-specific conditional KO with defined molecular pathway (MDM2/TP53) identified downstream of NR5A1\",\n      \"pmids\": [\"30872705\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"NR5A1 (SF-1/Ad4BP) is a nuclear receptor transcription factor that binds Ad4 sites in steroidogenic gene promoters (CYP11A, CYP11B, CYP17, StAR) via its zinc finger DBD; its LBD is occupied by phospholipid ligands (PIP2/PIP3) that stabilize coactivator recruitment; its transcriptional activity is regulated by SUMOylation (at K119/K194, reducing DNA binding and CDK7-dependent S203 phosphorylation respectively), SCF-mediated ubiquitin/proteasomal degradation, and interaction with co-regulators including Ptx1, Ubc9, and PIAS1; beyond transcription, SF-1 localizes to centrosomes where it suppresses DNA-PK activity to maintain centriole homeostasis and genomic stability; in vivo it is essential for adrenal and gonadal organogenesis, VMH terminal differentiation, and spleen development (via TLX1 transactivation), and its activity is upstream-regulated by Cited2/Wt1 and M33 (Polycomb).\"\n}\n```\n\n--- ROUND 2 (R2/R3, augmented corpus) ---\n\nI'll systematically classify each paper before extracting discoveries.\n\n**CLASSIFICATION:**\n\nPapers clearly about NR5A1 (SF-1/Ad4BP): [1],[2],[3],[4],[6],[8],[9],[10],[14],[15],[16],[17],[18],[19],[21],[22],[24],[25],[27],[28],[29],[30],[31],[32],[33],[34],[35],[36],[38],[39],[40],[41],[42],[43],[46],[49],[52],[53],[58],[60],[62],[65],[66],[69],[75],[76],[79],[82],[83],[85],[87],[89],[90],[91],[95],[97] and curated [9],[11],[12],[13],[14],[19],[20],[21],[22],[23],[24],[25],[26],[27],[28],[29],[30]\n\n**EXCLUDE — alias collision / off-target:**\n- Papers about HSF-1 (heat shock factor 1): [7],[12],[20],[23],[37],[44],[48],[50],[55],[70],[71],[86],[94],[96],[100] → EXCLUDE (HSF-1 ≠ NR5A1)\n- Papers about ELP (elastin-like polypeptide/protein, biomaterial): [5],[13],[26],[45],[47],[51],[54],[61],[63],[64],[72],[77],[78],[81],[84],[88],[92],[98],[99] → EXCLUDE\n- Papers about ERD-2/ELP-1 (Golgi protein): [11] → EXCLUDE\n- Paper about marsupial ELP (early lactation protein): [93] → EXCLUDE\n- Paper about endozepine-like peptide ELP in sperm: [67] → EXCLUDE\n- General genomics/interactome papers with no NR5A1-specific mechanism: curated [1],[2],[3],[4],[5],[6],[7],[8],[15],[16],[17],[18] → EXCLUDE (no specific NR5A1 mechanistic finding)\n\n```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1993,\n      \"finding\": \"Ad4BP (NR5A1) was identified as a steroidogenic tissue-specific transcription factor containing a zinc finger DNA-binding domain and a ligand-binding/dimerization domain, classifying it as a member of the steroid hormone receptor superfamily. It was purified from bovine adrenal cortex and shown to specifically bind Ad4 cis-acting elements in steroidogenic P-450 gene promoters (CYP11B) and to activate transcription of Ad4-containing reporter genes when transfected into CV-1 cells.\",\n      \"method\": \"Protein purification, cDNA cloning, sequence analysis, transfection/reporter assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — original cloning with direct functional validation in transfection assay, highly cited foundational paper\",\n      \"pmids\": [\"8463279\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"NR5A1 (Ad4BP/SF-1) regulates the Müllerian inhibiting substance (MIS) gene by binding to a conserved upstream regulatory element in primary Sertoli cells. In heterologous HeLa cells, MIS activation by SF-1 requires removal of the SF-1 ligand-binding domain, implicating a Sertoli cell-specific ligand or cofactor in regulating SF-1 transcriptional activity.\",\n      \"method\": \"Reporter gene assays in primary Sertoli cells and heterologous cells, deletion mutagenesis\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — functional dissection with domain deletion mutagenesis in relevant primary cells, highly cited\",\n      \"pmids\": [\"8205615\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"NR5A1 (Ad4BP) activates transcription through distal promoter elements of human CYP11A and bovine CYP11B genes containing Ad4 binding sites, in a steroidogenic cell-specific and cAMP-stimulated manner; the two distal promoters showed different requirements for basal promoter interactions.\",\n      \"method\": \"Transfection with CAT reporter constructs, promoter deletion analysis, cAMP stimulation\",\n      \"journal\": \"Journal of biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — cell-based reporter assays with promoter mapping in steroidogenic cells\",\n      \"pmids\": [\"7798178\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"Ad4BP/SF-1 exhibits sexually dimorphic expression in fetal rat gonads: high levels in fetal and prepubertal testes (somatic cells including Sertoli and Leydig cells) and low levels in fetal ovaries, with expression increasing in ovaries postnatally. Expression in gonads correlates temporally with MIS and steroidogenic P450 gene expression, suggesting a direct regulatory role in sex-specific gene activation during gonadal differentiation.\",\n      \"method\": \"Immunohistochemistry, RT-PCR, developmental staging across prenatal and postnatal rat tissues\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — systematic developmental expression with multiple orthogonal methods across multiple stages, highly cited\",\n      \"pmids\": [\"7607070\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1995,\n      \"finding\": \"Mouse ELP gene (encoding Ad4BP/SF-1) produces four isoforms (ELP1, ELP2, ELP3, Ad4BP/SF-1) through alternative promoter usage and differential splicing. ELP1 (lacking the ligand-binding domain region III) functions as a transcriptional repressor, while isoforms retaining both DNA-binding and ligand-binding domains (ELP2, ELP3, Ad4BP/SF-1) function as transactivators.\",\n      \"method\": \"cDNA library screening, genomic structure analysis, RT-PCR, reporter gene assays\",\n      \"journal\": \"Journal of biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — functional characterization of isoforms with reporter assays, domain structure linked to function\",\n      \"pmids\": [\"8543574\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1995,\n      \"finding\": \"NR5A1 (SF-1) knockout mice completely lack adrenal glands and gonads (agenesis), have persistent Müllerian structures in genetic males, and die shortly after birth with diminished corticosterone. P450scc expression in the placenta is unaffected by SF-1 absence, indicating tissue-context-dependent roles. ELP transcripts could not be detected in any mouse tissue, confirming the phenotype reflects absent SF-1.\",\n      \"method\": \"Gene targeting/knockout mice, serum hormone measurements, RT-PCR, phenotypic analysis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — genetic loss-of-function with defined organ agenesis phenotype, highly cited foundational study\",\n      \"pmids\": [\"7479914\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1996,\n      \"finding\": \"Ad4BP/SF-1 gene is controlled by an autoregulatory mechanism in which Ad4BP/SF-1 itself functions as the dominant transcription factor driving its own expression (autoregulation of the mammalian Ftz-F1 gene). SF-1 is also expressed in pituitary gonadotrophs and ventromedial hypothalamic nucleus in addition to steroidogenic endocrine tissues.\",\n      \"method\": \"Promoter analysis, transfection assays, in situ hybridization, immunohistochemistry\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — autoregulation demonstrated by reporter assays with SF-1 expression vectors\",\n      \"pmids\": [\"9002548\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"NR5A1 (SF-1) is an essential transcriptional regulator of steroidogenic enzyme genes (CYP11A1, CYP11B1, CYP17A1, CYP21A2, CYP19A1) and other endocrine genes through direct binding to Ad4/SF-1 response elements; SF-1 functions at all levels of the hypothalamic-pituitary-adrenal and gonadal axes.\",\n      \"method\": \"Review integrating reporter assays, knockout mouse phenotypes, promoter binding studies from multiple laboratories\",\n      \"journal\": \"Endocrine reviews\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — synthesis of multiple independent functional studies, highly cited\",\n      \"pmids\": [\"9183568\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"SF-1 (NR5A1) directly interacts with SOX9 via its C-terminal region; SOX9 binds the AMH promoter through a canonical SOX site and cooperates synergistically with SF-1 to activate AMH gene transcription in Sertoli cells, with the interaction demonstrated by in vitro and in vivo protein-binding assays.\",\n      \"method\": \"Co-immunoprecipitation, GST pulldown, co-transfection reporter assays, EMSA\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — reciprocal protein interaction assays combined with functional synergy assays, highly cited\",\n      \"pmids\": [\"9774680\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"WT1 (-KTS isoforms) associates directly with SF-1 and synergizes with it to activate MIS transcription; DAX-1 (NR0B1) antagonizes this WT1/SF-1 synergy through a direct interaction with SF-1. WT1 missense mutations associated with Denys-Drash syndrome (male pseudohermaphroditism) fail to synergize with SF-1.\",\n      \"method\": \"Co-immunoprecipitation, GST pulldown, co-transfection reporter assays, dominant-negative experiments\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct physical interaction demonstrated by multiple methods with functional epistasis, highly cited\",\n      \"pmids\": [\"9590178\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"Ptx1 (Pitx1) directly interacts with the N-terminal half of SF-1 through its C-terminus, enhancing SF-1 transcriptional activity to levels equivalent to a constitutively active SF-1 mutant. This interaction occurs on SF-1 target gene promoters (LHβ and MIS) and may mimic the functional effect of a ligand binding to SF-1's ligand-binding domain, providing a developmental mechanism to bypass SF-1 ligand dependence.\",\n      \"method\": \"Co-immunoprecipitation, GST pulldown, co-transfection reporter assays, domain mapping\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct physical interaction mapped to specific domains with functional consequence, moderate evidence\",\n      \"pmids\": [\"10369682\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"A heterozygous loss-of-function mutation in NR5A1 (G35E in the P-box of the DNA-binding domain) causes XY sex reversal and adrenal failure in humans, establishing that haploinsufficiency of SF-1 is sufficient to cause severe endocrine phenotypes in humans.\",\n      \"method\": \"Sequencing, in vitro functional assay of mutant protein DNA binding and transactivation\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — human loss-of-function with functional characterization of mutant, highly cited\",\n      \"pmids\": [\"10369247\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"GATA-4 directly interacts with SF-1 (NR5A1) through its zinc finger region to synergistically activate MIS promoter transcription. This synergy does not require GATA-4 DNA binding and is also observed with other GATA family members on multiple SF-1 target genes, revealing a protein-protein interaction mechanism for SF-1 co-regulation.\",\n      \"method\": \"GST pulldown, co-immunoprecipitation, co-transfection reporter assays, domain mutagenesis\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct protein interaction with domain mapping and functional synergy validated across multiple promoters\",\n      \"pmids\": [\"10446911\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"SF-1 transcriptional activity depends on phosphorylation of serine-203 (Ser-203) in the AF-1 activation domain by the MAPK signaling pathway. This phosphorylation is required for maximal SF-1-mediated transcription and for interaction with general nuclear receptor cofactors, coupling extracellular signals to steroid hormone synthesis.\",\n      \"method\": \"Phospho-specific antibodies, mutagenesis, kinase assays, co-immunoprecipitation with cofactors, reporter gene assays\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — phosphorylation site identified by mutagenesis, kinase pathway linked, cofactor recruitment assayed, highly cited\",\n      \"pmids\": [\"10230405\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Loss of SF-1 in knockout mice profoundly disrupts the cellular architecture of the ventromedial hypothalamic nucleus (VMH) from early stages, preventing normal exclusion of GABA/GAD67-immunoreactive cells and causing aberrant distribution of NPY, ERα, and galanin-expressing cells, demonstrating that SF-1 plays a direct role in determining the distribution and phenotypes of hypothalamic neurons.\",\n      \"method\": \"SF-1 knockout mouse analysis, immunohistochemistry for multiple neuronal markers at multiple developmental stages\",\n      \"journal\": \"The Journal of comparative neurology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function with multiple defined cellular phenotypes in the CNS\",\n      \"pmids\": [\"10880989\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"ACTH resistance in Y1 adrenocortical mutant cells results from impaired SF-1 (NR5A1) transcriptional activation function rather than altered DNA binding or altered cofactor (WT1, CBP/p300, SRC-1) levels; adding a VP16 activation domain to SF-1 restores transcriptional activity, and multiple SF-1 target genes (MC2R, CYP11B1, StAR) show differential SF-1 dependence.\",\n      \"method\": \"Reporter gene assays, EMSA, Western blot, 5'-deletion analysis, VP16 fusion rescue\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — functional dissection in adrenocortical mutant cell model with multiple orthogonal approaches\",\n      \"pmids\": [\"10770490\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"A homozygous NR5A1 mutation (R92Q) in the A-box secondary DNA-binding domain causes adrenal failure and 46,XY sex reversal only in homozygous state; heterozygous carriers are phenotypically normal. This contrasts with the P-box G35E mutation causing haploinsufficiency, demonstrating dose-dependent sensitivity of SF-1-dependent developmental pathways to gene dosage and A-box vs. P-box functional importance.\",\n      \"method\": \"Sequencing, functional assays of mutant proteins (DNA binding, transactivation)\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — human genetics with functional characterization revealing domain-specific effects\",\n      \"pmids\": [\"11932325\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"A heterozygous R255L mutation in the SF-1 ligand-binding domain causes adrenal insufficiency in a 46,XX female without apparent ovarian defects. The R255L mutant protein cannot bind canonical DNA sequences and is transcriptionally inactive without dominant-negative activity, establishing that NR5A1 DNA binding is essential for adrenal but not ovarian development.\",\n      \"method\": \"Sequencing, EMSA (DNA binding), reporter gene transactivation assay, dominant-negative testing\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — human mutation with full functional characterization\",\n      \"pmids\": [\"11038323\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"SF-1 is required for terminal differentiation of VMN neurons: SF-1 null mice retain VMN precursors but show misexpression of NKX2-1, absence of BDNF neurotrophin expression, and complete loss of axonal projections to the bed nucleus of stria terminalis and amygdala, demonstrating a role distinct from apoptosis-driven organ agenesis in peripheral endocrine tissues.\",\n      \"method\": \"SF-1 knockout mouse, immunohistochemistry, tract-tracing, marker expression analysis\",\n      \"journal\": \"Molecular and cellular neurosciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function with multiple defined circuit and differentiation phenotypes\",\n      \"pmids\": [\"12727442\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"The G146A variation in the hinge region of human Ad4BP/SF-1 shows slightly diminished transactivation on CYP11A and CYP19 promoters but does not affect protein expression, stability, dominant-negative activity, co-regulator interaction pattern, or subnuclear distribution, classifying it as a nonsynonymous SNP with possible clinical relevance in adrenal disease populations.\",\n      \"method\": \"Reporter gene assays, Western blot, subnuclear localization, co-regulator interaction assays\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — functional characterization with multiple assays, single laboratory\",\n      \"pmids\": [\"14623279\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Phosphatidylinositol lipids (phosphatidylinositol 4,5-bisphosphate and related species) occupy the ligand-binding pocket of SF-1 and LRH-1 as identified by crystal structures; ligand binding is required for maximal receptor activity. Evolutionary analysis shows ligand binding is the ancestral state of NR5A receptors.\",\n      \"method\": \"X-ray crystallography, biochemical binding assays, functional reporter assays\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — crystal structure plus biochemical and functional validation, highly cited\",\n      \"pmids\": [\"15707893\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Mouse Polycomb group protein M33 directly binds the Ad4BP/SF-1 (Nr5a1) gene locus (demonstrated by chromatin immunoprecipitation) and is required for normal Ad4BP/SF-1 expression. M33 knockout mice show significantly reduced Ad4BP/SF-1 protein levels and display adrenal and splenic defects phenotypically similar to Ad4BP/SF-1 knockout mice, establishing M33 as a direct upstream epigenetic regulator of Nr5a1.\",\n      \"method\": \"Chromatin immunoprecipitation, Western blot, immunohistochemistry, RT-PCR, knockout mouse phenotypic analysis\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP demonstrating direct binding plus genetic epistasis via knockout phenotype comparison\",\n      \"pmids\": [\"15899914\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Cited2 cooperates with Wt1 as a co-factor to stimulate SF-1 (Nr5a1) expression in the adrenogonadal primordium above the threshold required for adrenal cortex specification. Genetic and molecular evidence shows that Cited2 interacts with Wt1 to directly regulate Nr5a1 levels; adrenal defects in Sf-1/Cited2 double heterozygous embryos confirm pathway co-linearity.\",\n      \"method\": \"Genetic epistasis (double heterozygous mice), molecular interaction assays, promoter analysis, developmental staging\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis combined with molecular evidence across multiple mutant backgrounds\",\n      \"pmids\": [\"17537799\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Increased SF-1 (NR5A1) dosage by itself drives adrenocortical cell proliferation through concerted effects on the cell cycle and apoptosis in a transcriptional activity-dependent manner. In mice, increased Sf-1 dosage produces adrenocortical hyperplasia and gonadal marker-expressing tumors from the subcapsular region. SF-1 increases its own binding to the FATE1 promoter and modulates cofactor recruitment in a dosage-dependent manner.\",\n      \"method\": \"Sf-1 transgenic mice, cell proliferation assays, gene expression profiling, ChIP, reporter assays\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — transgenic overexpression with mechanistic follow-up by ChIP and cofactor recruitment, highly cited\",\n      \"pmids\": [\"17761949\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"HDAC inhibitors (trichostatin A, valproic acid) suppress steroidogenesis by promoting SCF (Skp1/Cul1/F-box) E3 ubiquitin ligase-mediated ubiquitination and proteasomal degradation of SF-1, mediated through increased expression of SKP1A (SCF subunit). SKP1A knockdown by siRNA prevents SF-1 degradation, and SF-1 overexpression rescues steroidogenesis despite HDAC inhibition.\",\n      \"method\": \"siRNA knockdown, overexpression rescue, ubiquitination assays, Western blot, steroid measurement\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — mechanism defined by siRNA epistasis and rescue experiments with multiple orthogonal methods\",\n      \"pmids\": [\"17709382\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"SF-1 promoter activity is regulated by DNA methylation status of a CpG island flanking the SF-1 promoter and exon I region. In endometriotic stromal cells, hypomethylation of this CpG island drives aberrant SF-1 expression; methyl-CpG-binding domain protein 2 (MBD2) binds the methylated SF-1 promoter in normal endometrial cells. Demethylation by 5-aza-2'-deoxycytidine induces SF-1 expression up to 55-fold in endometrial cells.\",\n      \"method\": \"Bisulfite sequencing, 5-aza-2'-deoxycytidine treatment, luciferase reporter assays, ChIP for MBD2\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — methylation mechanism validated by multiple orthogonal methods including ChIP and pharmacological demethylation\",\n      \"pmids\": [\"17519303\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Crystal structure of the SF-1 ligand-binding domain (LBD) bound to exchanged phosphatidylcholine shows the phospholipid in the hormone pocket, with two surface loops (L2-3 and L11-12) surrounding the pocket entrance varying between structures depending on bound ligand. Mutations in loop L11-12 impair phospholipid exchange and diminish transcriptional activity; the disease-associated L2-3 mutation R255L similarly impairs lipid binding and SF-1 activity.\",\n      \"method\": \"X-ray crystallography, phospholipid exchange assay, reporter gene transactivation assay, site-directed mutagenesis\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — crystal structure plus mutagenesis and biochemical functional validation\",\n      \"pmids\": [\"18988706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"SUMOylation of SF-1 at Lys119 (in the DNA-binding domain) markedly and selectively reduces SF-1 binding to noncanonical 'SUMO-sensitive' target gene promoters (e.g., inhibin-α), while leaving canonical target binding less affected. DNA binding and Lys119 SUMOylation appear to be mutually exclusive. SUMOylation at Lys194 (in the LBD) modestly reduces Ser203 phosphorylation and has more limited effects on SF-1 conformation and coregulator recruitment.\",\n      \"method\": \"In vitro SUMOylation, EMSA, ChIP, mutagenesis (K119R, K194R), reporter gene assays, NMR\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — site-specific mutagenesis combined with ChIP and structural analysis\",\n      \"pmids\": [\"18838537\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"SF-1 SUMOylation at K194 inhibits SF-1 transcriptional activity by reducing CDK7-mediated phosphorylation at Ser203. CDK7 preferentially binds the SUMOylation-deficient (K194R) form of SF-1; CDK7 inhibition reduces Ser203 phosphorylation. Loss of SUMOylation increases oscillatory StAR promoter occupancy and upregulates multiple steroidogenic enzyme genes.\",\n      \"method\": \"Co-immunoprecipitation (CDK7-SF-1), CDK7 inhibitor experiments, ChIP, mutagenesis, reporter gene assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — mechanistic link between two PTMs established by co-IP, kinase inhibition, and mutagenesis\",\n      \"pmids\": [\"19015234\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"PGE2 promotes coordinate binding of SF-1 to the promoters of StAR and aromatase genes in endometriotic cells, stimulating the full steroidogenic pathway from cholesterol to estradiol. COUP-TFII and WT1 suppress this pathway in normal endometrium by binding the same promoters and opposing SF-1 activity.\",\n      \"method\": \"ChIP for SF-1, COUP-TFII and WT1 at endogenous gene promoters; reporter assays; steroid measurements\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP at endogenous promoters combined with functional reporter and steroid production assays\",\n      \"pmids\": [\"19001523\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Heterozygous missense mutations in NR5A1 found in men with severe spermatogenic failure impair NR5A1 transactivational activity as shown by functional studies, establishing NR5A1 mutations as a cause of male infertility (~4% of unexplained severe spermatogenic failure).\",\n      \"method\": \"Sequencing, luciferase reporter transactivation assays of mutant proteins\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — human genetics with functional characterization of mutants\",\n      \"pmids\": [\"20887963\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"SF-1 (NR5A1) localizes to centrosomes in addition to the nucleus. SF-1 depletion by shRNA causes centrosome over-duplication, aberrant mitosis, and genomic instability, reducing cell numbers. A centrosome localization signal was identified in SF-1; both wild-type SF-1 and transcription-defective SF-1-G35E rescue centrosome amplification, indicating a non-genomic/non-transcriptional centrosomal function of SF-1.\",\n      \"method\": \"Immunofluorescence/co-localization, shRNA knockdown, centrosome counting, cell cycle analysis, mutagenesis\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — localization confirmed by imaging, functional rescue with transcription-dead mutant establishes non-transcriptional mechanism\",\n      \"pmids\": [\"21566663\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Ubc9 (SUMO E2 conjugase) and PIAS1 (SUMO E3 ligase) both physically interact with SF-1 and paradoxically function as coactivators—independent of their sumoylation enzymatic activity—for SF-1-mediated transcription of CYP17, CYP11A1, and CYP11B1 but not CYP11B2 in adrenocortical cells. SF-1, Ubc9, and PIAS1 are co-recruited to the endogenous CYP17 promoter.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, ChIP, reporter gene assays, sumoylation-inactive mutants\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods including ChIP at endogenous locus and siRNA epistasis\",\n      \"pmids\": [\"21467194\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Crystal structures of human NR5A1 (SF-1) LBD bound to PIP2 and PIP3 reveal that phosphoinositide hydrophobic tails are sequestered in the hormone pocket while the head groups are fully solvent-exposed and organize the receptor architecture at the pocket entrance. PIP3 (highest-affinity ligand) stabilizes the coactivator binding groove and increases coactivator peptide recruitment. The PIP3-stabilized surface on SF-1 coincides with the predicted DAX-1 corepressor binding site and harbors disease-associated missense mutations.\",\n      \"method\": \"X-ray crystallography, surface plasmon resonance/binding affinity assays, coactivator peptide recruitment assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — crystal structure with functional validation including binding affinity and coactivator recruitment\",\n      \"pmids\": [\"25288771\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"NR5A1 (SF-1) is required for human spleen development via transactivation of TLX1, a transcription factor essential for murine spleen organogenesis. A recessive SF-1 mutation (R103Q) reduces SF-1 transactivation of the TLX1 promoter and impairs steroidogenic gene activation, but does not affect SF-1/SRY co-activation of the SOX9 testis-development enhancer (TESCO), revealing functional separation of SF-1 activities.\",\n      \"method\": \"Human genetics, reporter gene assays for TLX1, steroidogenic gene, and TESCO promoters; functional mutation analysis\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — human loss-of-function mutation with mechanistic promoter dissection across multiple targets\",\n      \"pmids\": [\"24905461\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Prenatal nicotine exposure suppresses SF-1 expression and its transcriptional activity in fetal adrenal glands by decreasing histone H3K9 and H3K14 acetylation at the SF-1 promoter region via enhanced HDAC2 expression, reducing SF-1 binding to target gene promoters (e.g., StAR). TSA treatment reverses nicotine-mediated SF-1 suppression.\",\n      \"method\": \"ChIP for histone acetylation marks, bisulfite sequencing, co-IP for SF-1/StAR interaction, HDAC inhibitor rescue\",\n      \"journal\": \"Toxicology and applied pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple epigenetic assays with pharmacological rescue, but primarily in a toxicological model\",\n      \"pmids\": [\"24709674\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"NR5A1 prevents centriole splitting by inhibiting centrosomal DNA-PK activation. SF-1 depletion leads to aberrant GSK3β phosphorylation during G1 phase and β-catenin accumulation specifically at the centrosome (not the nucleus). DNA-PK inhibitor vanillin reverses these phenotypes. SF-1 interacts with cyclin A in the centrosome but not in the nucleus, and both full-length and DNA-binding-domain-deleted SF-1 rescue centriole splitting.\",\n      \"method\": \"Immunofluorescence, co-immunoprecipitation, shRNA depletion, DNA-PK inhibitor treatment, centriole counting\",\n      \"journal\": \"Cell communication and signaling\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — mechanistic centrosomal pathway defined by co-IP, pharmacological inhibition, and domain-deletion rescue\",\n      \"pmids\": [\"25421435\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"SF-1 deficiency in Leydig cells causes lipid accumulation through transcriptional suppression of STAR and CYP11A1, both required for mitochondrial cholesterol processing. Knockdown of either StAR or CYP11A1 individually induces lipid accumulation, and combined knockdown has an additive effect, establishing that SF-1-driven StAR/CYP11A1 expression is required to prevent cholesterol buildup.\",\n      \"method\": \"Heterozygous SF-1 knockout mice, Leydig cell line siRNA knockdown, lipid staining, steroid measurements, immunoblotting\",\n      \"journal\": \"Endocrine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic model plus mechanistic RNAi epistasis with defined cellular readout\",\n      \"pmids\": [\"27455990\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"In Nile tilapia, CRISPR/Cas9-mediated sf-1 (nr5a1) knockout results in gonadal dysgenesis, reduced steroidogenic cells, and haploinsufficiency (sf-1+/-) causes female-to-male sex reversal in XX fish. SF-1 deficiency decreased estradiol and CYP19A1/FOXL2 expression in XX fish, while 17α-methyltestosterone treatment rescued the XY gonadal phenotype, establishing SF-1's conserved role in teleost gonadal sex determination and steroidogenesis.\",\n      \"method\": \"CRISPR/Cas9 knockout, hormone rescue, immunohistochemistry, gene expression analysis\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function with pharmacological rescue and defined molecular pathway\",\n      \"pmids\": [\"27046435\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Ad4BP/SF-1 directly regulates cholesterogenic genes in steroidogenic cells (identified by ChIP-seq) and controls Hummr, a candidate mediator of cholesterol transport from endoplasmic reticulum to mitochondria, thereby coordinating cholesterol synthesis with steroidogenesis. This extends SF-1's role from steroidogenic enzyme gene regulation to the broader metabolic supply of the steroid substrate.\",\n      \"method\": \"ChIP-seq, gene expression profiling, functional validation of target genes\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genome-wide ChIP-seq for target identification with functional follow-up\",\n      \"pmids\": [\"30271905\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Insulin regulates adrenal steroidogenesis by increasing SF-1 protein and mRNA expression through inhibition of FoxO1; overexpression of FoxO1 suppresses SF-1 and its steroidogenic target genes, and hyperactivation of insulin signaling in mice increases adrenal SF-1 expression along with elevated aldosterone and corticosterone levels.\",\n      \"method\": \"In vitro insulin treatment, streptozotocin mouse model, FoxO1 overexpression, Western blot, hormone measurement\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — in vitro and in vivo evidence for insulin/FoxO1 pathway, mechanism partially defined\",\n      \"pmids\": [\"29567944\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"NR5A1 together with GATA4 is sufficient to reprogram human fibroblasts into induced Sertoli-like cells (hiSCs). These hiSCs exhibit transcriptome profiles and functional properties (support of spermatogonia viability, suppression of T-lymphocyte proliferation, xenograft immune protection) similar to primary human Sertoli cells, demonstrating that NR5A1 is a master reprogramming factor for Sertoli cell identity.\",\n      \"method\": \"Transcription factor-mediated cellular reprogramming, transcriptome profiling, functional co-culture assays, immune protection assays\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct reprogramming with functional validation across multiple Sertoli cell properties\",\n      \"pmids\": [\"31710289\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Sertoli cell-specific deletion of Nr5a1 at E14.5 (post-sex determination) leads to Sertoli cell apoptosis beginning at E15, associated with reduced MDM2 protein levels and elevated TP53, suggesting NR5A1 directly regulates MDM2 expression to suppress the TP53 apoptotic pathway. Loss of Sertoli and germ cells disrupts seminiferous cords by E18.5.\",\n      \"method\": \"Amh-Cre conditional knockout, TUNEL apoptosis assay, Western blot for MDM2/TP53, histological analysis\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with defined cellular phenotype and pathway marker analysis, MDM2 regulation inferred\",\n      \"pmids\": [\"30872705\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In zebrafish, nr5a1a and nr5a1b co-orthologs partition ancestral NR5A1 functions: nr5a1a is required for interrenal (adrenal) development and Leydig cell formation, while nr5a1b is required for gonad maintenance. Single-cell RNA-seq identified nr5a1a-expressing steroidogenic precursor cells co-expressing Cxcl12a at 1 dpf, mirroring the mammalian adrenal-gonadal primordium.\",\n      \"method\": \"CRISPR/Cas9 knockout of both ohnologs, single-cell RNA-seq, RNA-seq, immunohistochemistry, hormone measurements\",\n      \"journal\": \"Genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic dissection of subfunctionalization using multiple orthogonal methods including scRNA-seq\",\n      \"pmids\": [\"33724412\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"In the dragon lizard Pogona vitticeps, sex-specific alternative splicing of nr5a1 alleles on W and Z sex chromosomes determines sex: ZZ males produce two functional NR5A1 isoforms, while ZW females produce 16 isoforms mostly containing premature stop codons from the W-borne allele that likely generate truncated proteins with intact DNA-binding domains acting as competitive inhibitors of full-length NR5A1, thereby suppressing testis determination.\",\n      \"method\": \"Long-read RNA sequencing, isoform characterization, sex chromosome allele-specific expression analysis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — molecular characterization of isoforms without direct functional protein assays, mechanistic model is hypothetical\",\n      \"pmids\": [\"35074916\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Tpit (T-box transcription factor) trans-represses SF-1-mediated gonadotroph differentiation; inactivation of Tpit in the pituitary intermediate lobe results in loss of POMC-expressing cells replaced by gonadotrophs, and gain-of-function Tpit transgenes suppress gonadotroph development, establishing antagonism between Tpit and SF-1 in pituitary lineage determination.\",\n      \"method\": \"Tpit knockout mice, Tpit transgenic mice, immunohistochemistry, reporter gene assays\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis with both loss- and gain-of-function models\",\n      \"pmids\": [\"12651892\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"NR5A1 (SF-1/Ad4BP) is a zinc-finger orphan nuclear receptor that directly binds phosphatidylinositol lipids (particularly PIP2/PIP3) in its ligand-binding pocket to stabilize the coactivator-binding surface; its transcriptional activity is modulated by MAPK-dependent phosphorylation of Ser-203 (enhancing cofactor recruitment), SUMOylation at Lys119 (selectively reducing DNA binding at noncanonical targets) and Lys194 (inhibiting CDK7-mediated Ser-203 phosphorylation), and SCF-mediated ubiquitination/degradation; it directly interacts with co-regulators including SOX9, WT1, GATA-4, DAX-1, Ptx1, Ubc9, and PIAS1 to drive tissue-specific transcription of steroidogenic enzyme genes (CYP11A1, CYP11B1, CYP17A1, CYP19A1), cholesterol transport genes (StAR, Hummr), and developmental regulators (MIS/AMH, TLX1, SOX9 via TESCO); in addition to its nuclear transcriptional role, SF-1 localizes to centrosomes where it non-transcriptionally suppresses DNA-PK-driven centriole splitting and β-catenin accumulation to maintain genomic stability; epigenetic control of the NR5A1 gene itself involves Polycomb (M33), Wt1/Cited2-mediated dosage control, and CpG island methylation; collectively, NR5A1 functions as a master coordinator of adrenal/gonadal organogenesis, steroidogenesis, hypothalamic neuronal differentiation, spleen development, and Sertoli cell identity.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"NR5A1 (SF-1/Ad4BP) is a nuclear receptor transcription factor essential for the development and function of the adrenal glands, gonads, spleen, and ventromedial hypothalamus, acting as a master regulator of steroidogenesis and reproductive cell fate. It binds Ad4 sites in steroidogenic gene promoters (CYP11A1, CYP11B, CYP17, StAR) and the SOX9 TESCO enhancer via its zinc finger DNA-binding domain, with its ligand-binding domain occupied by phosphoinositide ligands (PIP2/PIP3) that stabilize the coactivator-binding groove and enhance transcriptional output [PMID:8463279, PMID:25288771, PMID:30067310]. Its activity is tuned by SUMOylation at K119 (reducing DNA binding) and K194 (inhibiting CDK7-mediated S203 phosphorylation), by SCF-dependent ubiquitin-proteasomal degradation, and by coactivators including Ptx1, Ubc9, and PIAS1 [PMID:18838537, PMID:19015234, PMID:17709382, PMID:21467194]. Beyond transcription, SF-1 localizes to centrosomes where it suppresses DNA-PK activation to maintain centriole homeostasis and genomic stability, a function separable from its transcriptional role [PMID:21566663, PMID:25421435]. Mutations in NR5A1 cause 46,XY disorders of sex development and, via impaired TLX1 transactivation, congenital asplenia [PMID:30067310, PMID:24905461].\",\n  \"teleology\": [\n    {\n      \"year\": 1993,\n      \"claim\": \"Identifying NR5A1 as a steroid receptor superfamily member that binds Ad4 promoter elements established it as a dedicated transcription factor for steroidogenic P-450 genes, answering the question of what factor confers tissue-specific activation of the steroidogenic program.\",\n      \"evidence\": \"cDNA cloning, protein purification, domain analysis, and CAT reporter assays in CV-1 cells\",\n      \"pmids\": [\"8463279\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological ligand unknown\", \"In vivo requirement not yet tested\", \"No structure of DNA-binding domain available\"]\n    },\n    {\n      \"year\": 1994,\n      \"claim\": \"Demonstrating sexually dimorphic SF-1 expression in fetal gonads and its correlation with MIS gene regulation extended its role from steroidogenic enzyme control to sex determination and Müllerian duct regression, establishing SF-1 as a developmental regulator beyond steroid synthesis.\",\n      \"evidence\": \"Immunohistochemistry and RT-PCR in rat fetal gonads; Ad4-site identification in MIS promoter\",\n      \"pmids\": [\"7607070\", \"7798178\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Correlative expression data; direct causality not shown for MIS regulation\", \"cAMP-dependent mechanism only demonstrated in cell lines\"]\n    },\n    {\n      \"year\": 1996,\n      \"claim\": \"The Nr5a1 knockout mouse revealed that SF-1 is indispensable at every level of the hypothalamic-pituitary-gonadal/adrenal axis, answering whether SF-1 has an obligate in vivo role in organogenesis beyond transcriptional activation in vitro.\",\n      \"evidence\": \"Gene knockout in mice showing adrenal and gonadal agenesis, gonadotroph failure, and VMH defects\",\n      \"pmids\": [\"9002548\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream target genes in each tissue not identified\", \"Cell-autonomous vs. non-autonomous roles not resolved\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Discovery that Ptx1 physically interacts with SF-1 and potentiates its transcriptional activity to a level mimicking ligand activation resolved how SF-1 achieves full activation even before its endogenous ligand was identified, establishing co-regulator synergy as a key activation mechanism.\",\n      \"evidence\": \"Co-immunoprecipitation and luciferase reporter assays on LHβ and MIS promoters\",\n      \"pmids\": [\"10369682\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of Ptx1-SF-1 synergy not tested\", \"Identity of the endogenous ligand still unknown\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Showing that SF-1 null mice retain VMH precursors but fail terminal differentiation (loss of BDNF, aberrant NKX2-1, absent projections) dissociated SF-1's role in VMH neuron specification from cell survival, answering whether SF-1 controls neuronal identity or just proliferation.\",\n      \"evidence\": \"SF-1 null mouse analysis with immunohistochemistry and axonal tracing\",\n      \"pmids\": [\"10880989\", \"12727442\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct transcriptional targets in VMH neurons unknown\", \"Whether SF-1 regulates BDNF directly or indirectly unresolved\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"ChIP evidence that the Polycomb protein M33 directly binds the Nr5a1 locus and is required for its expression identified the first upstream chromatin-level regulator of SF-1, answering how the Nr5a1 gene itself is activated during development.\",\n      \"evidence\": \"ChIP at Nr5a1 locus, M33 knockout mice with reduced SF-1 expression and adrenal/splenic defects\",\n      \"pmids\": [\"15899914\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether M33 acts through de-repression or direct activation unclear\", \"Mechanism of tissue specificity of M33 regulation unknown\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Identifying Cited2/Wt1 as upstream activators of Nr5a1 and SCF/SKP1A-mediated ubiquitin-proteasomal degradation as a turnover mechanism addressed how SF-1 protein levels are both initiated and limited, establishing dual-level control of SF-1 abundance.\",\n      \"evidence\": \"Compound heterozygous mice (Cited2/Sf-1) for upstream regulation; siRNA knockdown and ubiquitination assays for degradation\",\n      \"pmids\": [\"17537799\", \"17709382\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether SCF targets specific phosphoforms of SF-1 unknown\", \"Full E3 ligase complex composition not defined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Structural and biochemical demonstration that phospholipids occupy the SF-1 LBD pocket, and that SUMOylation at K119 and K194 differentially modulates DNA binding and CDK7-dependent phosphorylation, resolved two long-standing questions: the identity of an SF-1 ligand class and how post-translational modifications fine-tune its activity on specific promoters.\",\n      \"evidence\": \"Crystal structure of LBD with phosphatidylcholine, EMSA, ChIP, in vivo SUMOylation assays, CDK7 co-IP\",\n      \"pmids\": [\"18988706\", \"18838537\", \"19015234\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether phospholipid exchange occurs dynamically in vivo unknown\", \"Structural basis of K119 SUMO-DNA binding mutual exclusion not resolved at atomic level\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Discovery that SF-1 localizes to centrosomes and that its depletion causes centrosome over-duplication and genomic instability — rescued by a transcription-dead mutant — established a non-genomic centrosomal function separable from its transcriptional role, fundamentally expanding the functional repertoire of a nuclear receptor.\",\n      \"evidence\": \"Immunofluorescence, shRNA knockdown, rescue with SF-1-G35E mutant, centrosome counting\",\n      \"pmids\": [\"21566663\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Centrosomal targeting signal defined but interacting centrosomal partners unknown\", \"Whether centrosomal function is relevant in non-steroidogenic tissues not tested\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstration that Ubc9 and PIAS1 coactivate SF-1 independently of their SUMO ligase activities revealed that these proteins serve dual roles as conventional coactivators, not just PTM enzymes, refining the model of SF-1 transcriptional complex composition.\",\n      \"evidence\": \"Reciprocal co-IP, ChIP on endogenous CYP17 promoter, siRNA knockdown with gene expression readout\",\n      \"pmids\": [\"21467194\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Ubc9/PIAS1 coactivation and SUMOylation are temporally coordinated unknown\", \"Stoichiometry of the promoter-bound complex not defined\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"High-resolution structures of SF-1 LBD bound to PIP2 and PIP3 showed that phosphoinositide head groups organize the pocket entrance while stabilizing coactivator recruitment, and that PIP3 is the highest-affinity ligand, establishing the physiological ligand identity and explaining how disease mutations clustered at the PIP3-binding surface impair function.\",\n      \"evidence\": \"X-ray crystallography, fluorescence polarization ligand binding, coactivator peptide recruitment assay\",\n      \"pmids\": [\"25288771\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether intranuclear PIP3 levels dynamically regulate SF-1 in vivo unknown\", \"DAX-1 corepressor competition with PIP3 not directly tested structurally\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identifying an NR5A1 mutation (R103Q) that selectively impairs TLX1 transactivation without affecting SOX9 regulation, in a 46,XY-DSD patient with asplenia, established SF-1 as required for human spleen development and demonstrated promoter-selective consequences of disease mutations.\",\n      \"evidence\": \"Patient mutation identification, luciferase reporter assays on TLX1 and SOX9/TESCO promoters\",\n      \"pmids\": [\"24905461\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether other SF-1 target genes contribute to spleen development unknown\", \"Animal model validation of R103Q not performed\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Linking centrosomal SF-1 to suppression of DNA-PK activation, which otherwise triggers GSK3β/β-catenin-mediated centriole splitting, provided a complete mechanistic pathway for SF-1's non-genomic centrosomal role.\",\n      \"evidence\": \"shRNA, pharmacological DNA-PK inhibition (vanillin), co-IP with cyclin A, centrosome phenotype rescue\",\n      \"pmids\": [\"25421435\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct physical mechanism of DNA-PK suppression by SF-1 not defined\", \"Relevance to tumor centrosome amplification untested\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Genome-wide ChIP-seq revealed that SF-1 directly regulates cholesterogenic and cholesterol transport genes (Hummr) in addition to steroidogenic targets, answering how SF-1 coordinates the entire metabolic pipeline from cholesterol synthesis to steroid production.\",\n      \"evidence\": \"ChIP-seq and transcriptomics in steroidogenic cells\",\n      \"pmids\": [\"30271905\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional validation of individual cholesterogenic targets not performed\", \"Whether regulation is conserved in human adrenal cells untested\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Conditional Sertoli cell knockout and reprogramming experiments demonstrated that NR5A1 is both necessary for Sertoli cell survival (via MDM2-mediated TP53 suppression) and sufficient (with GATA4) to reprogram fibroblasts into functional Sertoli-like cells, establishing SF-1 as a master determinant of Sertoli cell identity.\",\n      \"evidence\": \"Conditional Amh-Cre Nr5a1 knockout with TUNEL and MDM2/TP53 analysis; NR5A1+GATA4 reprogramming with transcriptomic and functional validation\",\n      \"pmids\": [\"30872705\", \"31710289\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether MDM2 is a direct SF-1 transcriptional target unknown\", \"Long-term functionality and safety of reprogrammed Sertoli-like cells not assessed\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include: whether intranuclear phosphoinositide dynamics regulate SF-1 activity in real time, the identity of centrosomal binding partners mediating DNA-PK suppression, and the full spectrum of NR5A1 direct target genes that account for VMH neuronal differentiation.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No dynamic in vivo measurement of PIP3 occupancy in SF-1\", \"Centrosomal interactome not defined by unbiased methods\", \"VMH-specific direct target genes not identified genome-wide\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 2, 12]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 2, 4, 15, 18, 20]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [11, 17]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 10, 14]},\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [14, 16]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 2, 4, 12, 13, 15, 18, 20]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [1, 3, 5, 6, 8, 23]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [9, 19, 20]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [9, 12, 13]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [14, 16]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"PITX1\",\n      \"UBC9\",\n      \"PIAS1\",\n      \"CDK7\",\n      \"CCNA2\",\n      \"GATA4\",\n      \"SKP1\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```\n\n--- ROUND 2 (R2/R3, augmented corpus) ---\n\n```json\n{\n  \"mechanistic_narrative\": \"NR5A1 (SF-1/Ad4BP) is an orphan nuclear receptor that functions as a master transcriptional regulator of adrenal and gonadal organogenesis, steroidogenesis, hypothalamic neuronal differentiation, spleen development, and Sertoli cell identity [PMID:7479914, PMID:9183568, PMID:31710289, PMID:24905461]. It binds phosphatidylinositol lipids (PIP2/PIP3) in its ligand-binding pocket to stabilize the coactivator-binding surface and recruits tissue-specific cofactors including SOX9, WT1, GATA-4, Ptx1, Ubc9, and PIAS1 to activate steroidogenic enzyme genes (CYP11A1, CYP11B1, CYP17A1, CYP19A1), cholesterol transport genes (StAR, Hummr), and developmental regulators (AMH, TLX1) [PMID:25288771, PMID:9774680, PMID:9590178, PMID:10446911, PMID:30271905]. Its transcriptional output is tuned by MAPK-dependent phosphorylation at Ser-203, SUMOylation at Lys119 (selectively reducing noncanonical DNA binding) and Lys194 (inhibiting CDK7-mediated Ser-203 phosphorylation), and SCF-mediated ubiquitin-proteasomal degradation [PMID:10230405, PMID:18838537, PMID:19015234, PMID:17709382]. Heterozygous or homozygous loss-of-function NR5A1 mutations cause 46,XY sex reversal, adrenal insufficiency, and male infertility in humans, and SF-1 additionally localizes to centrosomes where it non-transcriptionally suppresses DNA-PK-driven centriole splitting to maintain genomic stability [PMID:10369247, PMID:11932325, PMID:20887963, PMID:21566663, PMID:25421435].\",\n  \"teleology\": [\n    {\n      \"year\": 1993,\n      \"claim\": \"Identification of Ad4BP/SF-1 as a steroidogenic tissue-specific transcription factor containing a zinc-finger DNA-binding domain and a ligand-binding domain established that a single nuclear receptor directly activated steroidogenic P-450 gene promoters through Ad4 cis-elements.\",\n      \"evidence\": \"Protein purification from bovine adrenal cortex, cDNA cloning, reporter assays in CV-1 cells\",\n      \"pmids\": [\"8463279\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No ligand identified\", \"Upstream regulators unknown\", \"In vivo requirement not yet demonstrated\"]\n    },\n    {\n      \"year\": 1994,\n      \"claim\": \"Demonstration that SF-1 directly regulated the MIS/AMH gene and showed sexually dimorphic expression in fetal gonads established it as a key regulator of sex-specific gene activation during gonadal differentiation, beyond steroidogenic enzymes alone.\",\n      \"evidence\": \"Reporter assays in primary Sertoli cells with domain deletions; immunohistochemistry and RT-PCR across developmental stages in rat\",\n      \"pmids\": [\"8205615\", \"7607070\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of the Sertoli cell-specific cofactor or ligand required for LBD-dependent activation unknown\", \"Mechanism of sex-dimorphic expression regulation unknown\"]\n    },\n    {\n      \"year\": 1995,\n      \"claim\": \"SF-1 knockout mice lacking adrenal glands and gonads proved that SF-1 is indispensable for organogenesis of the primary steroidogenic organs, resolving whether it was merely a modulator or an essential developmental factor.\",\n      \"evidence\": \"Gene targeting/knockout mice with complete adrenal and gonadal agenesis, neonatal lethality\",\n      \"pmids\": [\"7479914\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether haploinsufficiency causes disease in humans unknown\", \"Mechanism of organ agenesis (apoptosis vs. specification failure) not resolved\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Identification of direct physical interactions between SF-1 and tissue-specific transcription factors SOX9, WT1, and DAX-1 revealed how SF-1 achieves target gene selectivity through combinatorial cofactor recruitment, with DAX-1 functioning as a dedicated antagonist.\",\n      \"evidence\": \"Co-immunoprecipitation, GST pulldown, and synergy/antagonism in reporter assays on AMH and MIS promoters\",\n      \"pmids\": [\"9774680\", \"9590178\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of cofactor selectivity unknown\", \"Whether these interactions are regulated by post-translational modifications unknown\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Discovery that MAPK-dependent phosphorylation of Ser-203 is required for maximal SF-1 transcriptional activity and cofactor recruitment established a direct signaling mechanism coupling extracellular stimuli to steroidogenic gene output.\",\n      \"evidence\": \"Phospho-specific antibodies, S203A mutagenesis, kinase assays, cofactor co-IP, reporter assays\",\n      \"pmids\": [\"10230405\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether other kinases target Ser-203 in vivo unknown\", \"Crosstalk with SUMOylation not yet explored\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Human heterozygous NR5A1 mutations (G35E) causing XY sex reversal and adrenal failure proved that SF-1 haploinsufficiency is pathogenic, establishing NR5A1 as a disease gene for disorders of sex development and adrenal insufficiency.\",\n      \"evidence\": \"Patient sequencing with functional characterization of mutant DNA binding and transactivation\",\n      \"pmids\": [\"10369247\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genotype-phenotype correlation across different domains incomplete\", \"Mechanism of variable penetrance unknown\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Demonstration that SF-1 null mice lose VMH neuronal architecture and marker expression established a CNS developmental role for SF-1 distinct from its peripheral steroidogenic function, expanding its scope to hypothalamic neuron specification.\",\n      \"evidence\": \"SF-1 knockout mouse analysis with immunohistochemistry for multiple neuronal markers\",\n      \"pmids\": [\"10880989\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets in VMH neurons unknown\", \"Whether SF-1 acts cell-autonomously in neurons not definitively established\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Crystal structures revealing phosphatidylinositol lipids occupying the SF-1 ligand-binding pocket resolved the long-standing question of whether this 'orphan' receptor had a ligand and identified phospholipids as endogenous regulators of its activity.\",\n      \"evidence\": \"X-ray crystallography of SF-1 LBD with biochemical binding and reporter assays\",\n      \"pmids\": [\"15707893\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether PIP occupancy is dynamically regulated in vivo unknown\", \"Relative contribution of different PIP species to SF-1 activity in specific tissues unresolved\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Convergent discoveries of upstream regulatory mechanisms—Cited2/Wt1 dosage control of Nr5a1 expression, CpG island methylation of the SF-1 promoter, and SCF-mediated proteasomal degradation—revealed that SF-1 protein levels are tightly controlled at transcriptional, epigenetic, and post-translational levels, explaining dosage sensitivity in disease.\",\n      \"evidence\": \"Double-heterozygous epistasis in mice (Cited2/Sf-1); bisulfite sequencing and MBD2 ChIP in endometrial cells; siRNA knockdown of SKP1A preventing SF-1 degradation\",\n      \"pmids\": [\"17537799\", \"17519303\", \"17709382\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How these three regulatory layers are integrated in vivo unknown\", \"Whether SCF targeting is tissue-specific not determined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Site-specific SUMOylation at Lys119 and Lys194 was shown to selectively modulate SF-1 DNA-binding specificity and CDK7-dependent Ser-203 phosphorylation respectively, establishing a post-translational modification crosstalk network that tunes target gene selectivity.\",\n      \"evidence\": \"In vitro SUMOylation, EMSA, ChIP, NMR, CDK7 co-IP, mutagenesis (K119R, K194R)\",\n      \"pmids\": [\"18838537\", \"19015234\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo dynamics of SUMOylation/deSUMOylation cycles not characterized\", \"Identity of the SUMO protease(s) acting on SF-1 unknown\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Discovery of SF-1 localization to centrosomes and a non-transcriptional function in suppressing centriole over-duplication—rescued by the transcription-dead G35E mutant—revealed an unexpected moonlighting role in mitotic fidelity.\",\n      \"evidence\": \"Immunofluorescence co-localization, shRNA knockdown causing centrosome amplification, rescue with DNA-binding-defective mutant\",\n      \"pmids\": [\"21566663\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Centrosome-targeting mechanism not fully defined\", \"Whether centrosomal function contributes to disease phenotypes unknown\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"High-resolution structures of SF-1 LBD bound to PIP2/PIP3 revealed that PIP3 is the highest-affinity ligand stabilizing the coactivator groove, and that disease-associated mutations map to this surface, mechanistically linking lipid sensing to cofactor recruitment and pathogenesis.\",\n      \"evidence\": \"X-ray crystallography, surface plasmon resonance, coactivator peptide recruitment assays\",\n      \"pmids\": [\"25288771\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether PIP3 binding is regulated by PI3K signaling in steroidogenic cells not shown\", \"No structure of full-length SF-1 with cofactors available\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Mechanistic dissection of the centrosomal pathway showed SF-1 suppresses DNA-PK activation at centrosomes, preventing GSK3β phosphorylation and β-catenin accumulation that drive centriole splitting, defining a specific non-transcriptional signaling cascade.\",\n      \"evidence\": \"Co-IP, DNA-PK inhibitor rescue, shRNA, domain-deletion constructs\",\n      \"pmids\": [\"25421435\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct molecular target of SF-1 at the centrosome (how it inhibits DNA-PK) not identified\", \"Relevance to adrenocortical tumorigenesis not tested\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"NR5A1 with GATA4 was shown to be sufficient to reprogram human fibroblasts into functional Sertoli-like cells, establishing NR5A1 as a master identity factor for the Sertoli lineage and demonstrating its potential in regenerative medicine.\",\n      \"evidence\": \"Transcription factor-mediated reprogramming, transcriptome profiling, spermatogonia co-culture, immune protection assays\",\n      \"pmids\": [\"31710289\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether reprogrammed cells maintain long-term stability unknown\", \"Chromatin remodeling mechanisms during reprogramming not defined\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include how PIP3 occupancy is dynamically regulated in vivo to modulate SF-1 activity, the structural basis of full-length SF-1 interaction with its diverse cofactors, and the physiological significance of centrosomal SF-1 in adrenocortical tumorigenesis and genomic stability in vivo.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No in vivo evidence linking PI3K signaling to SF-1 PIP3 occupancy\", \"No full-length SF-1 structure with cofactor complex\", \"Centrosomal function not tested in animal disease models\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 2, 7, 8, 9, 12, 13, 23, 32, 34, 41]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 1, 2, 27, 39]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [20, 26, 33]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 1, 8, 27, 31, 32]},\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [31, 36]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 1, 2, 7, 8, 9, 12, 13, 27, 32, 34, 39]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [3, 5, 14, 18, 22, 38, 41, 43]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [13, 28, 40]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [7, 29, 37, 39]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [24, 27, 28]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"SOX9\",\n      \"WT1\",\n      \"GATA4\",\n      \"NR0B1\",\n      \"PITX1\",\n      \"UBE2I\",\n      \"PIAS1\",\n      \"CDK7\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}