{"gene":"FOXL2","run_date":"2026-06-09T23:54:44","timeline":{"discoveries":[{"year":2009,"finding":"A single recurrent somatic missense mutation in FOXL2 (402C→G; p.C134W) was identified in 97% of adult-type granulosa cell tumors (GCTs) by whole-transcriptome paired-end RNA sequencing, direct sequencing, and restriction-fragment-length polymorphism analysis, implicating mutant FOXL2 as a driver of adult-type GCT pathogenesis.","method":"Whole-transcriptome paired-end RNA sequencing, direct sequencing of cDNA and genomic DNA, RFLP analysis, TaqMan assays","journal":"The New England journal of medicine","confidence":"High","confidence_rationale":"Tier 1 / Strong — discovery-level sequencing with multiple orthogonal validation methods, replicated across large tumor cohort and independently confirmed by multiple subsequent studies","pmids":["19516027"],"is_preprint":false},{"year":2001,"finding":"Mutations in FOXL2 cause blepharophimosis-ptosis-epicanthus inversus syndrome (BPES); truncating mutations lacking or containing the forkhead domain cause BPES type I (with premature ovarian failure), whereas duplications/frameshifts downstream of the forkhead domain leading to extended protein cause BPES type II, establishing a genotype-phenotype correlation.","method":"Direct sequencing of FOXL2 coding region, mutation analysis in BPES families, genotype-phenotype correlation analysis","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct sequencing across large multi-family cohort, replicated by multiple subsequent studies","pmids":["11468277"],"is_preprint":false},{"year":2008,"finding":"FOXL2 binds to a forkhead-binding element (FKHB) immediately downstream of a Smad-binding element (SBE1) in the follistatin gene intronic enhancer, and directly associates with Smad3 (but not Smad2 or Smad4) via Smad3's MH2 domain, requiring an intact forkhead domain in FOXL2, to cooperatively drive activin-induced follistatin transcription in gonadotrope cells.","method":"Proteomics approach, chromatin immunoprecipitation, co-immunoprecipitation, shRNA knockdown, luciferase reporter assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP, ChIP, domain mutagenesis, and functional reporter assays in single lab with multiple orthogonal methods","pmids":["19106105"],"is_preprint":false},{"year":2010,"finding":"Wild-type FOXL2 induces apoptosis in granulosa cells via caspase 8 activation, BID cleavage, BAK oligomerization, and cytochrome c release, with upregulation of TNF-R1 and Fas; the C134W mutant FOXL2 fails to elicit this apoptotic signaling cascade, providing a mechanism by which the mutation contributes to GCT development.","method":"Overexpression and knockdown experiments, caspase activity assays, Western blotting, flow cytometry, death receptor blockade","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal functional assays in granulosa cells, single lab","pmids":["21119601"],"is_preprint":false},{"year":2005,"finding":"FOXL2 induces apoptosis in granulosa cells and interacts with DP103 (a DEAD-box containing protein); co-expression of DP103 with FOXL2 potentiates cell death.","method":"Co-immunoprecipitation, overexpression in CHO and rat granulosa cells, cell viability assays","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Weak — single Co-IP and functional overexpression, single lab, single study","pmids":["16153597"],"is_preprint":false},{"year":2006,"finding":"FOXL2 co-localizes with the glycoprotein hormone alpha-subunit (αGSU) in essentially all gonadotropes and thyrotropes of the mouse pituitary from embryonic day 11.5 through adulthood, and regulates mouse Cga (αGSU) transcription in a context-dependent manner; a FOXL2-VP16 fusion is sufficient to drive ectopic Cga expression in transgenic animals, placing FOXL2 in the pituitary developmental hierarchy upstream of gonadotrope-specific genes.","method":"Immunofluorescence co-localization, luciferase reporter assays in multiple cell lines, transgenic mouse with FOXL2-VP16 fusion","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 2 / Moderate — direct localization with functional consequence, in vivo transgenic validation, multiple cell-line reporter assays","pmids":["16840539"],"is_preprint":false},{"year":2011,"finding":"In Foxl2 mutant mice, FSHβ levels are severely impaired in both sexes, activin fails to drive Fshb expression in pituitary cells from mutants, and FSH secretion is undetectable, establishing that FOXL2 is required in pituitary gonadotropes for normal activin-dependent FSHβ transcription.","method":"Foxl2 mutant mouse analysis, primary pituitary cell culture with activin treatment, RIA for FSH, quantitative RT-PCR","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"High","confidence_rationale":"Tier 2 / Moderate — loss-of-function mouse model with defined cellular phenotype, multiple readouts, single lab","pmids":["21700720"],"is_preprint":false},{"year":2014,"finding":"SMAD4 and FOXL2 together are essential master regulators of Fshb transcription in vivo; conditional knockout of Smad4 alone or combined with Foxl2 deletion in gonadotropes abolishes FSH synthesis, and simultaneous deletion causes female sterility phenotypically similar to Fshb knockout mice.","method":"Conditional gene targeting (Cre-lox) in mice, hormone measurements, fertility assessment","journal":"FASEB journal : official publication of the Federation of American Societies for Experimental Biology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — in vivo conditional knockout with defined endocrine phenotype and genetic epistasis, single lab","pmids":["24739304"],"is_preprint":false},{"year":2018,"finding":"Deletion of Foxl2 and Smad4 in gonadotropes of adult mice using tamoxifen-inducible Cre causes profound reduction in FSH levels, arrested ovarian follicle development, and sterility, demonstrating that FOXL2 and SMAD4 are required for ongoing FSH synthesis in adult gonadotropes, not just during development.","method":"Tamoxifen-inducible conditional knockout (Cre-lox) in adult mice, FSH measurements, ovarian histology, fertility assessment","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — adult inducible conditional knockout with defined phenotype, confirms and extends prior finding, single lab","pmids":["29800110"],"is_preprint":false},{"year":2014,"finding":"FOXL2 transcriptionally represses Sf1 expression by binding a conserved FOXL2 binding site in the Sf1 proximal promoter and antagonizing WT1-KTS; in Foxl2-null mice, Sf1 expression is increased 2-fold in XX fetal gonads, and mutation of the FOXL2 binding site abolishes repression in reporter assays.","method":"Quantitative RT-PCR, luciferase reporter assays, in vitro chromatin immunoprecipitation, Foxl2-null mouse analysis","journal":"FASEB journal : official publication of the Federation of American Societies for Experimental Biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP, reporter assay with mutagenesis, and in vivo KO validation, single lab","pmids":["24451388"],"is_preprint":false},{"year":2018,"finding":"Genome-wide ChIP-seq of FOXL2 in fetal mouse ovaries revealed extensive overlap with SOX9-binding sites in the fetal testis, implying antagonistic FOXL2-SOX9 interactions at the chromatin level; ectopic FOXL2 expression in the fetal testis repressed Sertoli cell differentiation, causing partial testis-to-ovary sex reversal.","method":"Genome-wide ChIP-seq (FOXL2 and SOX9), transgenic mouse gain-of-function model, transcriptomic analysis","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — genome-wide ChIP-seq with in vivo functional validation in transgenic model, multiple orthogonal approaches, single lab","pmids":["30212841"],"is_preprint":false},{"year":2014,"finding":"FOXL2 is a female sex-determining gene in the goat: zinc-finger nuclease-directed biallelic knockout of FOXL2 alone (dissociated from lncRNA loss) causes XX female-to-male sex reversal and eyelid agenesis, establishing FOXL2 as a bona fide female sex-determining gene.","method":"Zinc-finger nuclease-directed mutagenesis, cloning from XX FOXL2-/- fibroblasts, histological and molecular phenotypic analysis","journal":"Current biology : CB","confidence":"High","confidence_rationale":"Tier 2 / Moderate — direct gene knockout via ZFN with in vivo phenotypic validation, confirmed by cloned animals, single lab","pmids":["24485832"],"is_preprint":false},{"year":2017,"finding":"In Nile tilapia, foxl2-/- XX fish display female-to-male sex reversal with downregulation of Cyp19a1a and estradiol, upregulation of Sf1/Dmrt1/Gsdf and androgen production; foxl2-/- phenotype is rescued by 17β-estradiol treatment; Foxl2 suppresses star1 transcription in a dose-dependent manner in vitro, demonstrating that FOXL2 promotes ovarian development by upregulating aromatase and repressing male pathway genes.","method":"CRISPR/Cas9 knockout, 17β-estradiol rescue experiment, in vitro promoter analysis, hormone measurement","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic knockout with rescue experiment, in vitro promoter assay, multiple phenotypic readouts, single lab","pmids":["28838139"],"is_preprint":false},{"year":2020,"finding":"FOXL2 C134W mutant acquires the ability to bind SMAD4, forming a FOXL2C134W/SMAD4/SMAD2/3 complex that binds a novel hybrid DNA motif (AGHCAHAA) unique to the mutant, inducing an enhancer-like chromatin state and transcription of genes characteristic of epithelial-to-mesenchymal transition; ablation of SMAD4 or SMAD2/3 strongly reduces FOXL2C134W binding at hybrid sites.","method":"ChIP-seq, transcriptome profiling, Co-immunoprecipitation, SMAD4/SMAD2/3 knockdown, isogenic inducible cell lines","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — ChIP-seq with isogenic lines, Co-IP, transcriptomics, and perturbation experiments, single lab with multiple orthogonal methods","pmids":["32641411"],"is_preprint":false},{"year":2020,"finding":"FOXL2 C134W mutation alters DNA-binding specificity of FOXL2: ChIP-seq in V5-FOXL2C134W isogenic inducible cell lines showed that the mutant associates with a large collection of unique genomic elements in addition to the majority of wild-type sites, altering the transcriptional program including upregulation of SLC35F2.","method":"ChIP-seq, transcriptome profiling, engineered isogenic inducible cell lines (V5-FOXL2WT and V5-FOXL2C134W)","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — two independent studies (PMIDs 32641411 and 32641414) using genome-wide ChIP-seq with isogenic lines independently establish altered DNA binding specificity of C134W mutant","pmids":["32641414"],"is_preprint":false},{"year":2020,"finding":"Upon DNA double-strand break (DSB) induction, SIRT1 translocates to the nucleus and deacetylates FOXL2 at lysine 124, causing liberation of XRCC5 and XRCC6 (Ku complex) from FOXL2; acetylated FOXL2 sequesters Ku, and FOXL2 ablation enhances Ku recruitment to DSB sites, accelerating NHEJ and inhibiting HR, demonstrating that FOXL2 governs DSB repair pathway choice through an acetylation-dependent interaction with the Ku complex.","method":"Co-immunoprecipitation, site-specific mutagenesis (K124 acetylation), FOXL2 ablation, DSB repair kinetics assays, nuclear fractionation","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — reciprocal Co-IP, mutagenesis identifying modification site, loss-of-function with defined DNA repair phenotype, multiple orthogonal methods in single lab","pmids":["32332759"],"is_preprint":false},{"year":2020,"finding":"The somatic heterozygous FOXL2 c.402C>G mutation introduces a target site for miR-1236 within the FOXL2 coding sequence; a non-canonical miRISC directed by AGO3 and DHX9 preferentially degrades the variant FOXL2 mRNA, causing haploinsufficiency of the tumor-suppressor FOXL2 in adult-type GCTs.","method":"miRNA target site validation (luciferase assay), AGO3/DHX9 co-immunoprecipitation, mouse AGCT model, patient samples","journal":"The EMBO journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional miRNA targeting assay, Co-IP of non-canonical miRISC components, in vivo model, single lab","pmids":["33215742"],"is_preprint":false},{"year":2013,"finding":"Wild-type FOXL2 (but not C134W mutant) induces follistatin production in granulosa tumor cells; overexpression of wild-type FOXL2 attenuates activin A-stimulated cell proliferation via follistatin, establishing a tumor-suppressor mechanism for wild-type FOXL2 in GCTs.","method":"Overexpression of WT and C134W mutant FOXL2, exogenous follistatin treatment, cell proliferation assays, luciferase reporter","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — functional overexpression with multiple readouts in GCT cell line, single lab","pmids":["24332943"],"is_preprint":false},{"year":2014,"finding":"FOXL2 transactivates the AMH gene promoter (confirmed by luciferase reporter assay, EMSA, and ChIP); BPES-associated mutant FOXL2 proteins are defective in AMH transactivation; in vivo, Amh knockdown accelerates follicle growth and FOXL2 overexpression prevents this acceleration, demonstrating positive cross-talk between FOXL2 and AMH in ovarian follicle reserve maintenance.","method":"Luciferase reporter assay, EMSA, chromatin immunoprecipitation, in vivo nucleic acid delivery in mice, ovarian histology","journal":"Fertility and sterility","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP, EMSA, reporter assay, and in vivo rescue, single lab with multiple methods","pmids":["24973035"],"is_preprint":false},{"year":2012,"finding":"Mutant FOXL2 differentially regulates transcription of StAR and CYP19A (known FOXL2 targets) and a suite of TGF-β signaling genes compared to wild-type FOXL2, as identified by microarray analysis in GCT cell lines following overexpression and knockdown, suggesting deregulation of anti-proliferative TGF-β signaling in GCT pathogenesis.","method":"siRNA knockdown and overexpression in GCT cell lines (KGN, COV434), Affymetrix microarray, permutation analysis","journal":"PloS one","confidence":"Low","confidence_rationale":"Tier 3 / Weak — transcriptomic profiling without direct binding or mechanistic validation of individual targets, single lab","pmids":["23029457"],"is_preprint":false},{"year":2017,"finding":"FOXL2 transactivation in chemoresistant gastric cancer is driven by interaction between HMGA2 and pRb facilitating E2F1-mediated FOXL2 transcription; FOXL2 then acts downstream of HMGA2 to regulate ITGA2 expression and promote metastasis and EMT.","method":"Co-immunoprecipitation, luciferase reporter assays, loss-of-function and gain-of-function in vitro and in vivo (orthotopic mouse model)","journal":"Clinical cancer research : an official journal of the American Association for Cancer Research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, reporter assay, and in vivo model, but FOXL2 role in gastric cancer is atypical/non-ovarian context; single lab","pmids":["28119367"],"is_preprint":false},{"year":2015,"finding":"Conditional deletion of Foxl2 in the postnatal uterus (using Pgr-Cre) causes infertility with reduced stromal layer thickness, hypertrophic inner myometrial layer, supplementary muscular layer formation, and failure of vascular smooth muscle organization; Wnt signaling genes are deregulated in Foxl2-deleted uteri, suggesting FOXL2 acts through Wnt signals in uterine maturation.","method":"Conditional knockout (Pgr-Cre; Foxl2-flox), histological analysis, gene expression analysis","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — conditional KO with defined uterine phenotype, Wnt pathway implicated by expression analysis but not mechanistically proven, single lab","pmids":["25687138"],"is_preprint":false},{"year":2024,"finding":"Multi-omics analysis of FOXL2 chromatin occupancy in ovarian somatic cells across development revealed that FOXL2 regulates more targets postnatally through interaction with factors regulating primordial follicle formation and steroidogenesis; deletion of FOXL2 interactor USP7 impairs somatic cell differentiation, germ cell nest breakdown, and ovarian development leading to sterility.","method":"Multi-omics (ChIP-seq, ATAC-seq, RNA-seq), genome-wide FOXL2 target identification, on-chromatin interaction proteomics, Usp7 conditional deletion in mice","journal":"Science advances","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — genome-wide multi-omics, on-chromatin interactome, and in vivo functional validation of interactor, multiple orthogonal methods in single rigorous study","pmids":["38517962"],"is_preprint":false},{"year":2012,"finding":"FOXL2 directly stimulates the clusterin (Clu) gene promoter in pituitary gonadotroph cells, and FOXL2 also binds and suppresses the PTTG promoter; FOXL2 and clusterin together restrain pituitary cell proliferation via induction of CDK inhibitors p16 and p27.","method":"Promoter-reporter (luciferase) assays, xenograft tumor growth assay with FOXL2/Clu overexpression","journal":"Molecular endocrinology (Baltimore, Md.)","confidence":"Low","confidence_rationale":"Tier 3 / Weak — luciferase reporter and xenograft, no ChIP confirmation, single lab","pmids":["23051594"],"is_preprint":false},{"year":2008,"finding":"The missense mutation p.Leu108Pro in the forkhead domain of FOXL2 causes strong cytoplasmic mislocalization of the protein and loss of transcriptional activity, while p.Ser217Cys (between forkhead and polyalanine domains) shows normal localization and transactivation, demonstrating that the forkhead domain is required for nuclear localization and transcriptional function.","method":"Subcellular localization assays (fluorescence microscopy), transcriptional activity reporter assays, structural modeling of forkhead domain","journal":"Human mutation","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct localization experiment with functional consequence via reporter assay, single lab, single study","pmids":["18484667"],"is_preprint":false},{"year":2019,"finding":"In embryonic chicken gonads, FOXL2 overexpression in XY gonads suppresses SOX9, DMRT1, and AMH expression and represses Sertoli cell development; conversely, FOXL2 knockdown in female gonads allows ectopic SOX9 activation, establishing FOXL2 as an embryonic antagonist of the male SOX9-driven pathway. FOXL2 misexpression alone was insufficient to activate aromatase in male gonads.","method":"In ovo overexpression and knockdown (electroporation/RNAi), immunofluorescence, qRT-PCR","journal":"The Journal of endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo gain- and loss-of-function in avian embryos with multiple molecular readouts, single lab","pmids":["31505465"],"is_preprint":false},{"year":2023,"finding":"Phosphorylated ERK1/2 down-regulates FOXL2 expression and up-regulates SOX9 in granulosa cells; SOX9 is found to regulate FOXL2 as well as CYP19A1 and STAR in granulosa cells, suggesting an ERK1/2-SOX9/FOXL2 axis that controls the switch from estradiol to progesterone production during follicular-luteal transition.","method":"ERK inhibition/activation in cultured granulosa cells, Western blotting, qRT-PCR, siRNA knockdown of SOX9","journal":"Life science alliance","confidence":"Low","confidence_rationale":"Tier 3 / Weak — pharmacological manipulation and knockdown in cultured cells, no direct ChIP or binding data, single lab","pmids":["37532283"],"is_preprint":false},{"year":2015,"finding":"Foxl2-null mice show defects in postnatal growth, skeletal abnormalities, and defects in cartilage and bone mineralization, with down-regulation of the GH/IGF1 axis; FOXL2 is expressed in embryonic cartilaginous tissue and hypothalamus, overlapping with SOX9 expression in cartilage.","method":"Foxl2 knockout mouse analysis, skeletal staining (alcian blue/alizarin red/Von Kossa), immunofluorescence, microarray, RT-qPCR of GH/IGF1 axis markers","journal":"BMC developmental biology","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — loss-of-function mouse with multiple phenotypic readouts, GH/IGF1 pathway implicated by expression analysis, single lab","pmids":["26134413"],"is_preprint":false},{"year":2015,"finding":"FOXL2 interacts with FTZ-F1 (via the forkhead domain of FOXL2, as identified by co-immunoprecipitation), and with DDX20; FOXL2 down-regulates vitellogenin expression in Eriocheir sinensis at the mature ovarian stage by binding DDX20 to regulate follicular cell apoptosis and by interacting with FTZ-F1 to repress VTG synthesis.","method":"Co-immunoprecipitation, domain interaction mapping, immunofluorescence, expression knockdown","journal":"Bioscience reports","confidence":"Low","confidence_rationale":"Tier 3 / Weak — Co-IP in crustacean model (non-vertebrate), functional inference primarily from expression correlation, single lab","pmids":["26430246"],"is_preprint":false},{"year":2020,"finding":"Aberrant constitutive overexpression of FOXL2 in ovarian somatic cells impairs germ cell nest breakdown, causes polyovular follicle formation, impairs granulosa cell differentiation, compromises theca cell recruitment and steroidogenesis, and prevents ovulation, demonstrating that fine-tuned FOXL2 expression level is required for folliculogenesis.","method":"Transgenic FOXL2 overexpression mouse model, ovarian histology, steroidogenesis measurements, immunofluorescence","journal":"Biology of reproduction","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — in vivo gain-of-function mouse with defined ovarian phenotype, single lab","pmids":["32945847"],"is_preprint":false}],"current_model":"FOXL2 is a forkhead transcription factor that acts as a master regulator of ovarian granulosa cell identity and function: it directly binds target gene promoters/enhancers (including CYP19A1/aromatase, StAR, AMH, follistatin, Cga, Fshb, Sf1, and clusterin) often cooperating with SMAD3 or SMAD4, represses testis-determining genes (Sox9, Dmrt1, AMH) to maintain ovarian fate, governs DNA double-strand break repair pathway choice via acetylation-dependent sequestration of the Ku (XRCC5/XRCC6) complex regulated by SIRT1-mediated deacetylation at lysine 124, and induces granulosa cell apoptosis through the TNF-R1/Fas–caspase 8–BID–BAK–cytochrome c pathway; the pathognomonic somatic C134W mutation alters DNA-binding specificity, allows the mutant to hijack SMAD4/SMAD2/3 to an oncogenic hybrid motif driving EMT-related gene expression, abolishes normal apoptotic signaling, and is selectively degraded via a non-canonical AGO3/DHX9 miRISC triggered by miR-1236, causing FOXL2 haploinsufficiency that drives adult-type granulosa cell tumor formation."},"narrative":{"mechanistic_narrative":"FOXL2 is a forkhead transcription factor that acts as a master regulator of ovarian granulosa cell identity and is a bona fide female sex-determining gene, with biallelic loss in goat and tilapia driving XX female-to-male sex reversal [PMID:24485832, PMID:28838139]. It establishes and maintains ovarian fate by antagonizing the male SOX9-driven program: genome-wide ChIP-seq shows extensive overlap of FOXL2 occupancy with SOX9 sites, and ectopic FOXL2 represses Sertoli-cell genes (SOX9, DMRT1, AMH) to cause partial testis-to-ovary reprogramming [PMID:30212841, PMID:31505465]. FOXL2 directly binds and regulates a panel of gonadal and pituitary target promoters/enhancers, repressing Sf1 by antagonizing WT1-KTS [PMID:24451388], transactivating AMH [PMID:24973035], and cooperating with the activin/TGF-β pathway through direct association with SMAD3 to drive follistatin transcription [PMID:19106105]. In pituitary gonadotropes FOXL2 acts together with SMAD4 as an essential, continuously required driver of activin-dependent Fshb/FSH synthesis [PMID:21700720, PMID:24739304, PMID:29800110] and co-regulates the glycoprotein hormone α-subunit gene Cga [PMID:16840539]. FOXL2 function depends on an intact forkhead domain for nuclear localization and DNA binding [PMID:18484667], and proper folliculogenesis requires tightly tuned FOXL2 dosage, as overexpression disrupts germ cell nest breakdown, granulosa differentiation, and ovulation [PMID:32945847]. Beyond transcription, FOXL2 governs DNA double-strand break repair pathway choice: acetylated FOXL2 sequesters the Ku (XRCC5/XRCC6) complex, and SIRT1-mediated deacetylation at lysine 124 liberates Ku to promote NHEJ over HR [PMID:32332759], and wild-type FOXL2 induces granulosa cell apoptosis via TNF-R1/Fas–caspase 8–BID–BAK–cytochrome c signaling [PMID:21119601]. FOXL2 mutation causes blepharophimosis-ptosis-epicanthus inversus syndrome (BPES), with genotype-phenotype correlation to type I (with premature ovarian failure) versus type II [#1-clarify], and the recurrent somatic C134W mutation defines adult-type granulosa cell tumors [PMID:19516027]: C134W alters DNA-binding specificity, hijacks SMAD4/SMAD2/3 to a novel hybrid motif driving EMT-related transcription [PMID:32641411, PMID:32641414], abolishes apoptotic signaling [PMID:21119601], and the mutant transcript is selectively degraded by a non-canonical AGO3/DHX9 miRISC triggered by a miR-1236 site created by the mutation, producing FOXL2 haploinsufficiency [PMID:33215742].","teleology":[{"year":2001,"claim":"Establishing that FOXL2 loss-of-function underlies a human syndrome combining eyelid and ovarian defects first linked the gene to gonadal and craniofacial development.","evidence":"Direct sequencing and genotype-phenotype correlation across BPES families","pmids":["11468277"],"confidence":"High","gaps":["Did not define FOXL2 molecular targets or mechanism","Mechanism linking forkhead-domain truncation to ovarian failure unresolved"]},{"year":2005,"claim":"Identifying that FOXL2 induces granulosa cell apoptosis and binds the DEAD-box protein DP103 began connecting FOXL2 to cell-fate control in the ovary.","evidence":"Co-IP and overexpression/viability assays in CHO and rat granulosa cells","pmids":["16153597"],"confidence":"Medium","gaps":["Single Co-IP without reciprocal validation","Apoptotic effector pathway not defined here"]},{"year":2006,"claim":"Placing FOXL2 upstream of gonadotrope-specific genes in the pituitary extended its role beyond the ovary to endocrine development.","evidence":"Immunofluorescence co-localization, reporter assays, and a FOXL2-VP16 transgenic mouse driving ectopic Cga","pmids":["16840539"],"confidence":"High","gaps":["Direct binding to Cga not demonstrated by ChIP","Cofactor requirements for pituitary action not defined"]},{"year":2008,"claim":"Demonstrating cooperative FOXL2-Smad3 binding at the follistatin enhancer revealed how FOXL2 integrates activin/TGF-β signaling at target genes.","evidence":"ChIP, reciprocal Co-IP, domain mutagenesis, and luciferase reporters in gonadotrope cells","pmids":["19106105"],"confidence":"High","gaps":["Selectivity for Smad3 over Smad2/Smad4 mechanism unexplained","In vivo requirement not tested in this study"]},{"year":2008,"claim":"Mapping the forkhead domain as essential for nuclear localization clarified why domain-disrupting mutations abolish FOXL2 function.","evidence":"Subcellular localization and transactivation assays of L108P versus S217C variants with structural modeling","pmids":["18484667"],"confidence":"Medium","gaps":["Single study, limited variant set","Does not address DNA-binding specificity determinants"]},{"year":2009,"claim":"Discovering the recurrent somatic C134W mutation in nearly all adult-type granulosa cell tumors established FOXL2 as the defining driver of this cancer.","evidence":"Whole-transcriptome RNA sequencing with orthogonal sequencing/RFLP validation across a tumor cohort","pmids":["19516027"],"confidence":"High","gaps":["Functional consequence of C134W not resolved at discovery","Tumor-suppressor versus oncogene role of mutant unclear"]},{"year":2010,"claim":"Defining the wild-type FOXL2 apoptotic cascade and its loss in C134W provided a mechanistic basis for tumorigenesis through apoptosis evasion.","evidence":"Overexpression/knockdown, caspase assays, Western blot, flow cytometry, and death receptor blockade in granulosa cells","pmids":["21119601"],"confidence":"Medium","gaps":["Single lab","Direct transcriptional targets of the death-receptor induction not mapped"]},{"year":2014,"claim":"Genetic knockout in goat and tilapia proved FOXL2 is a bona fide female sex-determining gene acting via aromatase induction and male-pathway repression.","evidence":"ZFN biallelic knockout in goat and CRISPR knockout with estradiol rescue in tilapia","pmids":["24485832","28838139"],"confidence":"High","gaps":["Direct binding to all sex-pathway targets not established","Conservation of mechanism to humans inferred, not tested"]},{"year":2014,"claim":"Showing FOXL2 represses Sf1 and transactivates AMH defined direct transcriptional nodes controlling gonadal somatic differentiation and follicle reserve.","evidence":"ChIP/EMSA, reporter assays with binding-site mutagenesis, and in vivo knockout/knockdown in mice","pmids":["24451388","24973035"],"confidence":"Medium","gaps":["Cofactor requirements at these promoters not fully mapped","Quantitative contribution to phenotype unresolved"]},{"year":2014,"claim":"Conditional double knockout established FOXL2 and SMAD4 as joint, essential in vivo drivers of FSH synthesis, formalizing the activin/SMAD–FOXL2 axis.","evidence":"Cre-lox conditional Smad4/Foxl2 deletion in gonadotropes with hormone and fertility readouts; later confirmed in adult inducible model","pmids":["24739304","29800110","21700720"],"confidence":"High","gaps":["Genome-wide FOXL2-SMAD4 cobinding in vivo not mapped here","Mechanism of continued adult requirement not detailed"]},{"year":2018,"claim":"Genome-wide ChIP-seq revealing FOXL2-SOX9 binding-site overlap mechanistically grounded the FOXL2-SOX9 antagonism that maintains ovarian versus testicular fate.","evidence":"FOXL2 and SOX9 ChIP-seq plus transgenic gain-of-function causing partial sex reversal in mouse","pmids":["30212841","31505465"],"confidence":"High","gaps":["Whether overlap reflects competition or sequential occupancy unresolved","Aromatase activation requires additional factors not identified"]},{"year":2020,"claim":"Showing C134W acquires SMAD4/SMAD2/3 binding at a novel hybrid motif explained the gain-of-function transcriptional reprogramming toward EMT in tumors.","evidence":"ChIP-seq and transcriptomics in isogenic inducible lines with SMAD knockdown; two independent studies","pmids":["32641411","32641414"],"confidence":"High","gaps":["Whether hybrid-motif targets are sufficient for transformation untested","Chromatin-remodeling machinery recruited not identified"]},{"year":2020,"claim":"Identifying acetylation-dependent FOXL2 sequestration of Ku, reversed by SIRT1 deacetylation at K124, revealed a non-transcriptional role governing DSB repair pathway choice.","evidence":"Reciprocal Co-IP, K124 site mutagenesis, FOXL2 ablation, and DSB repair kinetics with nuclear fractionation","pmids":["32332759"],"confidence":"High","gaps":["Relevance to granulosa tumorigenesis not directly tested","Whether C134W alters this function unknown"]},{"year":2020,"claim":"Demonstrating selective miR-1236/AGO3/DHX9-mediated degradation of the C134W transcript provided a mechanism for FOXL2 haploinsufficiency in tumors.","evidence":"Luciferase target validation, AGO3/DHX9 Co-IP, mouse AGCT model, and patient samples","pmids":["33215742"],"confidence":"Medium","gaps":["Non-canonical miRISC composition incompletely defined","Generality across tumors not established"]},{"year":2024,"claim":"Multi-omics mapping of developmental FOXL2 chromatin occupancy and its on-chromatin interactome (including USP7) defined how FOXL2 target repertoire expands postnatally to control folliculogenesis.","evidence":"ChIP-seq/ATAC-seq/RNA-seq, on-chromatin interaction proteomics, and Usp7 conditional deletion in mice","pmids":["38517962"],"confidence":"High","gaps":["Functional roles of most newly identified interactors untested","Direct USP7-FOXL2 biochemical relationship not detailed"]},{"year":null,"claim":"How FOXL2 dosage, post-translational modification, and cofactor switching are integrated to flip between its transcriptional, apoptotic, and DNA-repair roles in a single cell remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking acetylation state to target selection","Structural basis of C134W motif change not solved","How normal versus tumor cofactor complexes are partitioned unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[2,9,10,13,14,18]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[2,13,14,18]},{"term_id":"GO:0140313","term_label":"molecular sequestering activity","supporting_discovery_ids":[15]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[24,15]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[2,9,10,13,18]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[10,11,12,25]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[0,1,13,16]},{"term_id":"R-HSA-73894","term_label":"DNA Repair","supporting_discovery_ids":[15]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[3]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[2,6,7]}],"complexes":[],"partners":["SMAD3","SMAD4","SMAD2","XRCC5","XRCC6","SIRT1","USP7","AGO3"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P58012","full_name":"Forkhead box protein L2","aliases":[],"length_aa":376,"mass_kda":38.8,"function":"Transcriptional regulator. 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ophthalmology","url":"https://pubmed.ncbi.nlm.nih.gov/21325395","citation_count":21,"is_preprint":false},{"pmid":"24817949","id":"PMC_24817949","title":"FOXL2 suppresses proliferation, invasion and promotes apoptosis of cervical cancer cells.","date":"2014","source":"International journal of clinical and experimental pathology","url":"https://pubmed.ncbi.nlm.nih.gov/24817949","citation_count":21,"is_preprint":false},{"pmid":"25581731","id":"PMC_25581731","title":"FOXL2 mutation is absent in uterine tumors resembling ovarian sex cord tumors.","date":"2015","source":"The American journal of surgical pathology","url":"https://pubmed.ncbi.nlm.nih.gov/25581731","citation_count":21,"is_preprint":false},{"pmid":"21640373","id":"PMC_21640373","title":"FOXL2 C402G mutation detection using MALDI-TOF-MS in DNA extracted from Israeli granulosa cell tumors.","date":"2011","source":"Gynecologic 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    \"method\": \"Whole-transcriptome paired-end RNA sequencing, direct sequencing of cDNA and genomic DNA, RFLP analysis, TaqMan assays\",\n      \"journal\": \"The New England journal of medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — discovery-level sequencing with multiple orthogonal validation methods, replicated across large tumor cohort and independently confirmed by multiple subsequent studies\",\n      \"pmids\": [\"19516027\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Mutations in FOXL2 cause blepharophimosis-ptosis-epicanthus inversus syndrome (BPES); truncating mutations lacking or containing the forkhead domain cause BPES type I (with premature ovarian failure), whereas duplications/frameshifts downstream of the forkhead domain leading to extended protein cause BPES type II, establishing a genotype-phenotype correlation.\",\n      \"method\": \"Direct sequencing of FOXL2 coding region, mutation analysis in BPES families, genotype-phenotype correlation analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct sequencing across large multi-family cohort, replicated by multiple subsequent studies\",\n      \"pmids\": [\"11468277\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"FOXL2 binds to a forkhead-binding element (FKHB) immediately downstream of a Smad-binding element (SBE1) in the follistatin gene intronic enhancer, and directly associates with Smad3 (but not Smad2 or Smad4) via Smad3's MH2 domain, requiring an intact forkhead domain in FOXL2, to cooperatively drive activin-induced follistatin transcription in gonadotrope cells.\",\n      \"method\": \"Proteomics approach, chromatin immunoprecipitation, co-immunoprecipitation, shRNA knockdown, luciferase reporter assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP, ChIP, domain mutagenesis, and functional reporter assays in single lab with multiple orthogonal methods\",\n      \"pmids\": [\"19106105\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Wild-type FOXL2 induces apoptosis in granulosa cells via caspase 8 activation, BID cleavage, BAK oligomerization, and cytochrome c release, with upregulation of TNF-R1 and Fas; the C134W mutant FOXL2 fails to elicit this apoptotic signaling cascade, providing a mechanism by which the mutation contributes to GCT development.\",\n      \"method\": \"Overexpression and knockdown experiments, caspase activity assays, Western blotting, flow cytometry, death receptor blockade\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal functional assays in granulosa cells, single lab\",\n      \"pmids\": [\"21119601\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"FOXL2 induces apoptosis in granulosa cells and interacts with DP103 (a DEAD-box containing protein); co-expression of DP103 with FOXL2 potentiates cell death.\",\n      \"method\": \"Co-immunoprecipitation, overexpression in CHO and rat granulosa cells, cell viability assays\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP and functional overexpression, single lab, single study\",\n      \"pmids\": [\"16153597\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"FOXL2 co-localizes with the glycoprotein hormone alpha-subunit (αGSU) in essentially all gonadotropes and thyrotropes of the mouse pituitary from embryonic day 11.5 through adulthood, and regulates mouse Cga (αGSU) transcription in a context-dependent manner; a FOXL2-VP16 fusion is sufficient to drive ectopic Cga expression in transgenic animals, placing FOXL2 in the pituitary developmental hierarchy upstream of gonadotrope-specific genes.\",\n      \"method\": \"Immunofluorescence co-localization, luciferase reporter assays in multiple cell lines, transgenic mouse with FOXL2-VP16 fusion\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct localization with functional consequence, in vivo transgenic validation, multiple cell-line reporter assays\",\n      \"pmids\": [\"16840539\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"In Foxl2 mutant mice, FSHβ levels are severely impaired in both sexes, activin fails to drive Fshb expression in pituitary cells from mutants, and FSH secretion is undetectable, establishing that FOXL2 is required in pituitary gonadotropes for normal activin-dependent FSHβ transcription.\",\n      \"method\": \"Foxl2 mutant mouse analysis, primary pituitary cell culture with activin treatment, RIA for FSH, quantitative RT-PCR\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function mouse model with defined cellular phenotype, multiple readouts, single lab\",\n      \"pmids\": [\"21700720\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SMAD4 and FOXL2 together are essential master regulators of Fshb transcription in vivo; conditional knockout of Smad4 alone or combined with Foxl2 deletion in gonadotropes abolishes FSH synthesis, and simultaneous deletion causes female sterility phenotypically similar to Fshb knockout mice.\",\n      \"method\": \"Conditional gene targeting (Cre-lox) in mice, hormone measurements, fertility assessment\",\n      \"journal\": \"FASEB journal : official publication of the Federation of American Societies for Experimental Biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo conditional knockout with defined endocrine phenotype and genetic epistasis, single lab\",\n      \"pmids\": [\"24739304\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Deletion of Foxl2 and Smad4 in gonadotropes of adult mice using tamoxifen-inducible Cre causes profound reduction in FSH levels, arrested ovarian follicle development, and sterility, demonstrating that FOXL2 and SMAD4 are required for ongoing FSH synthesis in adult gonadotropes, not just during development.\",\n      \"method\": \"Tamoxifen-inducible conditional knockout (Cre-lox) in adult mice, FSH measurements, ovarian histology, fertility assessment\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — adult inducible conditional knockout with defined phenotype, confirms and extends prior finding, single lab\",\n      \"pmids\": [\"29800110\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"FOXL2 transcriptionally represses Sf1 expression by binding a conserved FOXL2 binding site in the Sf1 proximal promoter and antagonizing WT1-KTS; in Foxl2-null mice, Sf1 expression is increased 2-fold in XX fetal gonads, and mutation of the FOXL2 binding site abolishes repression in reporter assays.\",\n      \"method\": \"Quantitative RT-PCR, luciferase reporter assays, in vitro chromatin immunoprecipitation, Foxl2-null mouse analysis\",\n      \"journal\": \"FASEB journal : official publication of the Federation of American Societies for Experimental Biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP, reporter assay with mutagenesis, and in vivo KO validation, single lab\",\n      \"pmids\": [\"24451388\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Genome-wide ChIP-seq of FOXL2 in fetal mouse ovaries revealed extensive overlap with SOX9-binding sites in the fetal testis, implying antagonistic FOXL2-SOX9 interactions at the chromatin level; ectopic FOXL2 expression in the fetal testis repressed Sertoli cell differentiation, causing partial testis-to-ovary sex reversal.\",\n      \"method\": \"Genome-wide ChIP-seq (FOXL2 and SOX9), transgenic mouse gain-of-function model, transcriptomic analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — genome-wide ChIP-seq with in vivo functional validation in transgenic model, multiple orthogonal approaches, single lab\",\n      \"pmids\": [\"30212841\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"FOXL2 is a female sex-determining gene in the goat: zinc-finger nuclease-directed biallelic knockout of FOXL2 alone (dissociated from lncRNA loss) causes XX female-to-male sex reversal and eyelid agenesis, establishing FOXL2 as a bona fide female sex-determining gene.\",\n      \"method\": \"Zinc-finger nuclease-directed mutagenesis, cloning from XX FOXL2-/- fibroblasts, histological and molecular phenotypic analysis\",\n      \"journal\": \"Current biology : CB\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct gene knockout via ZFN with in vivo phenotypic validation, confirmed by cloned animals, single lab\",\n      \"pmids\": [\"24485832\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"In Nile tilapia, foxl2-/- XX fish display female-to-male sex reversal with downregulation of Cyp19a1a and estradiol, upregulation of Sf1/Dmrt1/Gsdf and androgen production; foxl2-/- phenotype is rescued by 17β-estradiol treatment; Foxl2 suppresses star1 transcription in a dose-dependent manner in vitro, demonstrating that FOXL2 promotes ovarian development by upregulating aromatase and repressing male pathway genes.\",\n      \"method\": \"CRISPR/Cas9 knockout, 17β-estradiol rescue experiment, in vitro promoter analysis, hormone measurement\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic knockout with rescue experiment, in vitro promoter assay, multiple phenotypic readouts, single lab\",\n      \"pmids\": [\"28838139\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FOXL2 C134W mutant acquires the ability to bind SMAD4, forming a FOXL2C134W/SMAD4/SMAD2/3 complex that binds a novel hybrid DNA motif (AGHCAHAA) unique to the mutant, inducing an enhancer-like chromatin state and transcription of genes characteristic of epithelial-to-mesenchymal transition; ablation of SMAD4 or SMAD2/3 strongly reduces FOXL2C134W binding at hybrid sites.\",\n      \"method\": \"ChIP-seq, transcriptome profiling, Co-immunoprecipitation, SMAD4/SMAD2/3 knockdown, isogenic inducible cell lines\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — ChIP-seq with isogenic lines, Co-IP, transcriptomics, and perturbation experiments, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"32641411\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FOXL2 C134W mutation alters DNA-binding specificity of FOXL2: ChIP-seq in V5-FOXL2C134W isogenic inducible cell lines showed that the mutant associates with a large collection of unique genomic elements in addition to the majority of wild-type sites, altering the transcriptional program including upregulation of SLC35F2.\",\n      \"method\": \"ChIP-seq, transcriptome profiling, engineered isogenic inducible cell lines (V5-FOXL2WT and V5-FOXL2C134W)\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — two independent studies (PMIDs 32641411 and 32641414) using genome-wide ChIP-seq with isogenic lines independently establish altered DNA binding specificity of C134W mutant\",\n      \"pmids\": [\"32641414\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Upon DNA double-strand break (DSB) induction, SIRT1 translocates to the nucleus and deacetylates FOXL2 at lysine 124, causing liberation of XRCC5 and XRCC6 (Ku complex) from FOXL2; acetylated FOXL2 sequesters Ku, and FOXL2 ablation enhances Ku recruitment to DSB sites, accelerating NHEJ and inhibiting HR, demonstrating that FOXL2 governs DSB repair pathway choice through an acetylation-dependent interaction with the Ku complex.\",\n      \"method\": \"Co-immunoprecipitation, site-specific mutagenesis (K124 acetylation), FOXL2 ablation, DSB repair kinetics assays, nuclear fractionation\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — reciprocal Co-IP, mutagenesis identifying modification site, loss-of-function with defined DNA repair phenotype, multiple orthogonal methods in single lab\",\n      \"pmids\": [\"32332759\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The somatic heterozygous FOXL2 c.402C>G mutation introduces a target site for miR-1236 within the FOXL2 coding sequence; a non-canonical miRISC directed by AGO3 and DHX9 preferentially degrades the variant FOXL2 mRNA, causing haploinsufficiency of the tumor-suppressor FOXL2 in adult-type GCTs.\",\n      \"method\": \"miRNA target site validation (luciferase assay), AGO3/DHX9 co-immunoprecipitation, mouse AGCT model, patient samples\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional miRNA targeting assay, Co-IP of non-canonical miRISC components, in vivo model, single lab\",\n      \"pmids\": [\"33215742\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Wild-type FOXL2 (but not C134W mutant) induces follistatin production in granulosa tumor cells; overexpression of wild-type FOXL2 attenuates activin A-stimulated cell proliferation via follistatin, establishing a tumor-suppressor mechanism for wild-type FOXL2 in GCTs.\",\n      \"method\": \"Overexpression of WT and C134W mutant FOXL2, exogenous follistatin treatment, cell proliferation assays, luciferase reporter\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — functional overexpression with multiple readouts in GCT cell line, single lab\",\n      \"pmids\": [\"24332943\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"FOXL2 transactivates the AMH gene promoter (confirmed by luciferase reporter assay, EMSA, and ChIP); BPES-associated mutant FOXL2 proteins are defective in AMH transactivation; in vivo, Amh knockdown accelerates follicle growth and FOXL2 overexpression prevents this acceleration, demonstrating positive cross-talk between FOXL2 and AMH in ovarian follicle reserve maintenance.\",\n      \"method\": \"Luciferase reporter assay, EMSA, chromatin immunoprecipitation, in vivo nucleic acid delivery in mice, ovarian histology\",\n      \"journal\": \"Fertility and sterility\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP, EMSA, reporter assay, and in vivo rescue, single lab with multiple methods\",\n      \"pmids\": [\"24973035\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Mutant FOXL2 differentially regulates transcription of StAR and CYP19A (known FOXL2 targets) and a suite of TGF-β signaling genes compared to wild-type FOXL2, as identified by microarray analysis in GCT cell lines following overexpression and knockdown, suggesting deregulation of anti-proliferative TGF-β signaling in GCT pathogenesis.\",\n      \"method\": \"siRNA knockdown and overexpression in GCT cell lines (KGN, COV434), Affymetrix microarray, permutation analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — transcriptomic profiling without direct binding or mechanistic validation of individual targets, single lab\",\n      \"pmids\": [\"23029457\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"FOXL2 transactivation in chemoresistant gastric cancer is driven by interaction between HMGA2 and pRb facilitating E2F1-mediated FOXL2 transcription; FOXL2 then acts downstream of HMGA2 to regulate ITGA2 expression and promote metastasis and EMT.\",\n      \"method\": \"Co-immunoprecipitation, luciferase reporter assays, loss-of-function and gain-of-function in vitro and in vivo (orthotopic mouse model)\",\n      \"journal\": \"Clinical cancer research : an official journal of the American Association for Cancer Research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, reporter assay, and in vivo model, but FOXL2 role in gastric cancer is atypical/non-ovarian context; single lab\",\n      \"pmids\": [\"28119367\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Conditional deletion of Foxl2 in the postnatal uterus (using Pgr-Cre) causes infertility with reduced stromal layer thickness, hypertrophic inner myometrial layer, supplementary muscular layer formation, and failure of vascular smooth muscle organization; Wnt signaling genes are deregulated in Foxl2-deleted uteri, suggesting FOXL2 acts through Wnt signals in uterine maturation.\",\n      \"method\": \"Conditional knockout (Pgr-Cre; Foxl2-flox), histological analysis, gene expression analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — conditional KO with defined uterine phenotype, Wnt pathway implicated by expression analysis but not mechanistically proven, single lab\",\n      \"pmids\": [\"25687138\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Multi-omics analysis of FOXL2 chromatin occupancy in ovarian somatic cells across development revealed that FOXL2 regulates more targets postnatally through interaction with factors regulating primordial follicle formation and steroidogenesis; deletion of FOXL2 interactor USP7 impairs somatic cell differentiation, germ cell nest breakdown, and ovarian development leading to sterility.\",\n      \"method\": \"Multi-omics (ChIP-seq, ATAC-seq, RNA-seq), genome-wide FOXL2 target identification, on-chromatin interaction proteomics, Usp7 conditional deletion in mice\",\n      \"journal\": \"Science advances\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — genome-wide multi-omics, on-chromatin interactome, and in vivo functional validation of interactor, multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"38517962\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"FOXL2 directly stimulates the clusterin (Clu) gene promoter in pituitary gonadotroph cells, and FOXL2 also binds and suppresses the PTTG promoter; FOXL2 and clusterin together restrain pituitary cell proliferation via induction of CDK inhibitors p16 and p27.\",\n      \"method\": \"Promoter-reporter (luciferase) assays, xenograft tumor growth assay with FOXL2/Clu overexpression\",\n      \"journal\": \"Molecular endocrinology (Baltimore, Md.)\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — luciferase reporter and xenograft, no ChIP confirmation, single lab\",\n      \"pmids\": [\"23051594\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"The missense mutation p.Leu108Pro in the forkhead domain of FOXL2 causes strong cytoplasmic mislocalization of the protein and loss of transcriptional activity, while p.Ser217Cys (between forkhead and polyalanine domains) shows normal localization and transactivation, demonstrating that the forkhead domain is required for nuclear localization and transcriptional function.\",\n      \"method\": \"Subcellular localization assays (fluorescence microscopy), transcriptional activity reporter assays, structural modeling of forkhead domain\",\n      \"journal\": \"Human mutation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct localization experiment with functional consequence via reporter assay, single lab, single study\",\n      \"pmids\": [\"18484667\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"In embryonic chicken gonads, FOXL2 overexpression in XY gonads suppresses SOX9, DMRT1, and AMH expression and represses Sertoli cell development; conversely, FOXL2 knockdown in female gonads allows ectopic SOX9 activation, establishing FOXL2 as an embryonic antagonist of the male SOX9-driven pathway. FOXL2 misexpression alone was insufficient to activate aromatase in male gonads.\",\n      \"method\": \"In ovo overexpression and knockdown (electroporation/RNAi), immunofluorescence, qRT-PCR\",\n      \"journal\": \"The Journal of endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo gain- and loss-of-function in avian embryos with multiple molecular readouts, single lab\",\n      \"pmids\": [\"31505465\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Phosphorylated ERK1/2 down-regulates FOXL2 expression and up-regulates SOX9 in granulosa cells; SOX9 is found to regulate FOXL2 as well as CYP19A1 and STAR in granulosa cells, suggesting an ERK1/2-SOX9/FOXL2 axis that controls the switch from estradiol to progesterone production during follicular-luteal transition.\",\n      \"method\": \"ERK inhibition/activation in cultured granulosa cells, Western blotting, qRT-PCR, siRNA knockdown of SOX9\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — pharmacological manipulation and knockdown in cultured cells, no direct ChIP or binding data, single lab\",\n      \"pmids\": [\"37532283\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Foxl2-null mice show defects in postnatal growth, skeletal abnormalities, and defects in cartilage and bone mineralization, with down-regulation of the GH/IGF1 axis; FOXL2 is expressed in embryonic cartilaginous tissue and hypothalamus, overlapping with SOX9 expression in cartilage.\",\n      \"method\": \"Foxl2 knockout mouse analysis, skeletal staining (alcian blue/alizarin red/Von Kossa), immunofluorescence, microarray, RT-qPCR of GH/IGF1 axis markers\",\n      \"journal\": \"BMC developmental biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — loss-of-function mouse with multiple phenotypic readouts, GH/IGF1 pathway implicated by expression analysis, single lab\",\n      \"pmids\": [\"26134413\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"FOXL2 interacts with FTZ-F1 (via the forkhead domain of FOXL2, as identified by co-immunoprecipitation), and with DDX20; FOXL2 down-regulates vitellogenin expression in Eriocheir sinensis at the mature ovarian stage by binding DDX20 to regulate follicular cell apoptosis and by interacting with FTZ-F1 to repress VTG synthesis.\",\n      \"method\": \"Co-immunoprecipitation, domain interaction mapping, immunofluorescence, expression knockdown\",\n      \"journal\": \"Bioscience reports\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — Co-IP in crustacean model (non-vertebrate), functional inference primarily from expression correlation, single lab\",\n      \"pmids\": [\"26430246\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Aberrant constitutive overexpression of FOXL2 in ovarian somatic cells impairs germ cell nest breakdown, causes polyovular follicle formation, impairs granulosa cell differentiation, compromises theca cell recruitment and steroidogenesis, and prevents ovulation, demonstrating that fine-tuned FOXL2 expression level is required for folliculogenesis.\",\n      \"method\": \"Transgenic FOXL2 overexpression mouse model, ovarian histology, steroidogenesis measurements, immunofluorescence\",\n      \"journal\": \"Biology of reproduction\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — in vivo gain-of-function mouse with defined ovarian phenotype, single lab\",\n      \"pmids\": [\"32945847\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"FOXL2 is a forkhead transcription factor that acts as a master regulator of ovarian granulosa cell identity and function: it directly binds target gene promoters/enhancers (including CYP19A1/aromatase, StAR, AMH, follistatin, Cga, Fshb, Sf1, and clusterin) often cooperating with SMAD3 or SMAD4, represses testis-determining genes (Sox9, Dmrt1, AMH) to maintain ovarian fate, governs DNA double-strand break repair pathway choice via acetylation-dependent sequestration of the Ku (XRCC5/XRCC6) complex regulated by SIRT1-mediated deacetylation at lysine 124, and induces granulosa cell apoptosis through the TNF-R1/Fas–caspase 8–BID–BAK–cytochrome c pathway; the pathognomonic somatic C134W mutation alters DNA-binding specificity, allows the mutant to hijack SMAD4/SMAD2/3 to an oncogenic hybrid motif driving EMT-related gene expression, abolishes normal apoptotic signaling, and is selectively degraded via a non-canonical AGO3/DHX9 miRISC triggered by miR-1236, causing FOXL2 haploinsufficiency that drives adult-type granulosa cell tumor formation.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"FOXL2 is a forkhead transcription factor that acts as a master regulator of ovarian granulosa cell identity and is a bona fide female sex-determining gene, with biallelic loss in goat and tilapia driving XX female-to-male sex reversal [#11, #12]. It establishes and maintains ovarian fate by antagonizing the male SOX9-driven program: genome-wide ChIP-seq shows extensive overlap of FOXL2 occupancy with SOX9 sites, and ectopic FOXL2 represses Sertoli-cell genes (SOX9, DMRT1, AMH) to cause partial testis-to-ovary reprogramming [#10, #25]. FOXL2 directly binds and regulates a panel of gonadal and pituitary target promoters/enhancers, repressing Sf1 by antagonizing WT1-KTS [#9], transactivating AMH [#18], and cooperating with the activin/TGF-β pathway through direct association with SMAD3 to drive follistatin transcription [#2]. In pituitary gonadotropes FOXL2 acts together with SMAD4 as an essential, continuously required driver of activin-dependent Fshb/FSH synthesis [#6, #7, #8] and co-regulates the glycoprotein hormone α-subunit gene Cga [#5]. FOXL2 function depends on an intact forkhead domain for nuclear localization and DNA binding [#24], and proper folliculogenesis requires tightly tuned FOXL2 dosage, as overexpression disrupts germ cell nest breakdown, granulosa differentiation, and ovulation [#29]. Beyond transcription, FOXL2 governs DNA double-strand break repair pathway choice: acetylated FOXL2 sequesters the Ku (XRCC5/XRCC6) complex, and SIRT1-mediated deacetylation at lysine 124 liberates Ku to promote NHEJ over HR [#15], and wild-type FOXL2 induces granulosa cell apoptosis via TNF-R1/Fas–caspase 8–BID–BAK–cytochrome c signaling [#3]. FOXL2 mutation causes blepharophimosis-ptosis-epicanthus inversus syndrome (BPES), with genotype-phenotype correlation to type I (with premature ovarian failure) versus type II [#1-clarify], and the recurrent somatic C134W mutation defines adult-type granulosa cell tumors [#0]: C134W alters DNA-binding specificity, hijacks SMAD4/SMAD2/3 to a novel hybrid motif driving EMT-related transcription [#13, #14], abolishes apoptotic signaling [#3], and the mutant transcript is selectively degraded by a non-canonical AGO3/DHX9 miRISC triggered by a miR-1236 site created by the mutation, producing FOXL2 haploinsufficiency [#16].\",\n  \"teleology\": [\n    {\n      \"year\": 2001,\n      \"claim\": \"Establishing that FOXL2 loss-of-function underlies a human syndrome combining eyelid and ovarian defects first linked the gene to gonadal and craniofacial development.\",\n      \"evidence\": \"Direct sequencing and genotype-phenotype correlation across BPES families\",\n      \"pmids\": [\"11468277\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define FOXL2 molecular targets or mechanism\", \"Mechanism linking forkhead-domain truncation to ovarian failure unresolved\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Identifying that FOXL2 induces granulosa cell apoptosis and binds the DEAD-box protein DP103 began connecting FOXL2 to cell-fate control in the ovary.\",\n      \"evidence\": \"Co-IP and overexpression/viability assays in CHO and rat granulosa cells\",\n      \"pmids\": [\"16153597\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single Co-IP without reciprocal validation\", \"Apoptotic effector pathway not defined here\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Placing FOXL2 upstream of gonadotrope-specific genes in the pituitary extended its role beyond the ovary to endocrine development.\",\n      \"evidence\": \"Immunofluorescence co-localization, reporter assays, and a FOXL2-VP16 transgenic mouse driving ectopic Cga\",\n      \"pmids\": [\"16840539\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct binding to Cga not demonstrated by ChIP\", \"Cofactor requirements for pituitary action not defined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Demonstrating cooperative FOXL2-Smad3 binding at the follistatin enhancer revealed how FOXL2 integrates activin/TGF-β signaling at target genes.\",\n      \"evidence\": \"ChIP, reciprocal Co-IP, domain mutagenesis, and luciferase reporters in gonadotrope cells\",\n      \"pmids\": [\"19106105\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Selectivity for Smad3 over Smad2/Smad4 mechanism unexplained\", \"In vivo requirement not tested in this study\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Mapping the forkhead domain as essential for nuclear localization clarified why domain-disrupting mutations abolish FOXL2 function.\",\n      \"evidence\": \"Subcellular localization and transactivation assays of L108P versus S217C variants with structural modeling\",\n      \"pmids\": [\"18484667\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single study, limited variant set\", \"Does not address DNA-binding specificity determinants\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Discovering the recurrent somatic C134W mutation in nearly all adult-type granulosa cell tumors established FOXL2 as the defining driver of this cancer.\",\n      \"evidence\": \"Whole-transcriptome RNA sequencing with orthogonal sequencing/RFLP validation across a tumor cohort\",\n      \"pmids\": [\"19516027\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional consequence of C134W not resolved at discovery\", \"Tumor-suppressor versus oncogene role of mutant unclear\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Defining the wild-type FOXL2 apoptotic cascade and its loss in C134W provided a mechanistic basis for tumorigenesis through apoptosis evasion.\",\n      \"evidence\": \"Overexpression/knockdown, caspase assays, Western blot, flow cytometry, and death receptor blockade in granulosa cells\",\n      \"pmids\": [\"21119601\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab\", \"Direct transcriptional targets of the death-receptor induction not mapped\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Genetic knockout in goat and tilapia proved FOXL2 is a bona fide female sex-determining gene acting via aromatase induction and male-pathway repression.\",\n      \"evidence\": \"ZFN biallelic knockout in goat and CRISPR knockout with estradiol rescue in tilapia\",\n      \"pmids\": [\"24485832\", \"28838139\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct binding to all sex-pathway targets not established\", \"Conservation of mechanism to humans inferred, not tested\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Showing FOXL2 represses Sf1 and transactivates AMH defined direct transcriptional nodes controlling gonadal somatic differentiation and follicle reserve.\",\n      \"evidence\": \"ChIP/EMSA, reporter assays with binding-site mutagenesis, and in vivo knockout/knockdown in mice\",\n      \"pmids\": [\"24451388\", \"24973035\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Cofactor requirements at these promoters not fully mapped\", \"Quantitative contribution to phenotype unresolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Conditional double knockout established FOXL2 and SMAD4 as joint, essential in vivo drivers of FSH synthesis, formalizing the activin/SMAD–FOXL2 axis.\",\n      \"evidence\": \"Cre-lox conditional Smad4/Foxl2 deletion in gonadotropes with hormone and fertility readouts; later confirmed in adult inducible model\",\n      \"pmids\": [\"24739304\", \"29800110\", \"21700720\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide FOXL2-SMAD4 cobinding in vivo not mapped here\", \"Mechanism of continued adult requirement not detailed\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Genome-wide ChIP-seq revealing FOXL2-SOX9 binding-site overlap mechanistically grounded the FOXL2-SOX9 antagonism that maintains ovarian versus testicular fate.\",\n      \"evidence\": \"FOXL2 and SOX9 ChIP-seq plus transgenic gain-of-function causing partial sex reversal in mouse\",\n      \"pmids\": [\"30212841\", \"31505465\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether overlap reflects competition or sequential occupancy unresolved\", \"Aromatase activation requires additional factors not identified\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showing C134W acquires SMAD4/SMAD2/3 binding at a novel hybrid motif explained the gain-of-function transcriptional reprogramming toward EMT in tumors.\",\n      \"evidence\": \"ChIP-seq and transcriptomics in isogenic inducible lines with SMAD knockdown; two independent studies\",\n      \"pmids\": [\"32641411\", \"32641414\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether hybrid-motif targets are sufficient for transformation untested\", \"Chromatin-remodeling machinery recruited not identified\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identifying acetylation-dependent FOXL2 sequestration of Ku, reversed by SIRT1 deacetylation at K124, revealed a non-transcriptional role governing DSB repair pathway choice.\",\n      \"evidence\": \"Reciprocal Co-IP, K124 site mutagenesis, FOXL2 ablation, and DSB repair kinetics with nuclear fractionation\",\n      \"pmids\": [\"32332759\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relevance to granulosa tumorigenesis not directly tested\", \"Whether C134W alters this function unknown\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Demonstrating selective miR-1236/AGO3/DHX9-mediated degradation of the C134W transcript provided a mechanism for FOXL2 haploinsufficiency in tumors.\",\n      \"evidence\": \"Luciferase target validation, AGO3/DHX9 Co-IP, mouse AGCT model, and patient samples\",\n      \"pmids\": [\"33215742\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Non-canonical miRISC composition incompletely defined\", \"Generality across tumors not established\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Multi-omics mapping of developmental FOXL2 chromatin occupancy and its on-chromatin interactome (including USP7) defined how FOXL2 target repertoire expands postnatally to control folliculogenesis.\",\n      \"evidence\": \"ChIP-seq/ATAC-seq/RNA-seq, on-chromatin interaction proteomics, and Usp7 conditional deletion in mice\",\n      \"pmids\": [\"38517962\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional roles of most newly identified interactors untested\", \"Direct USP7-FOXL2 biochemical relationship not detailed\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How FOXL2 dosage, post-translational modification, and cofactor switching are integrated to flip between its transcriptional, apoptotic, and DNA-repair roles in a single cell remains unresolved.\",\n      \"evidence\": null,\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking acetylation state to target selection\", \"Structural basis of C134W motif change not solved\", \"How normal versus tumor cofactor complexes are partitioned unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [2, 9, 10, 13, 14, 18]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [2, 13, 14, 18]},\n      {\"term_id\": \"GO:0140313\", \"supporting_discovery_ids\": [15]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [24, 15]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [2, 9, 10, 13, 18]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [10, 11, 12, 25]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [0, 1, 13, 16]},\n      {\"term_id\": \"R-HSA-73894\", \"supporting_discovery_ids\": [15]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [3]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [2, 6, 7]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"SMAD3\", \"SMAD4\", \"SMAD2\", \"XRCC5\", \"XRCC6\", \"SIRT1\", \"USP7\", \"AGO3\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}