{"gene":"DENND1A","run_date":"2026-04-28T17:46:02","timeline":{"discoveries":[{"year":2014,"finding":"DENND1A variant 2 (DENND1A.V2), a truncated isoform, is upregulated in PCOS theca cells and drives augmented CYP17A1 and CYP11A1 gene transcription and androgen biosynthesis; forced overexpression in normal theca cells confers a PCOS phenotype, and knockdown in PCOS theca cells reduces androgen biosynthesis.","method":"Overexpression and siRNA knockdown in primary human theca cells; mRNA quantification and steroid hormone measurement; IgG-mediated neutralization experiment","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 — bidirectional loss- and gain-of-function in primary human cells with specific molecular and biochemical readouts; replicated across multiple approaches in same study","pmids":["24706793"],"is_preprint":false},{"year":2016,"finding":"DENND1A.V2 is produced by alternative splicing through exonization of sequences in intron 20, generating a unique exon 20A that encodes the C-terminus of V2; forced V2 expression in adrenal NCI-H295A cells increases CYP17A1 and CYP11A1 mRNA.","method":"Minigene expression vectors; RT-PCR; forced overexpression in NCI-H295A adrenal cells with mRNA quantification","journal":"Molecular and cellular endocrinology","confidence":"High","confidence_rationale":"Tier 2 — molecular characterization of splicing mechanism combined with functional overexpression assay in adrenal cells","pmids":["27297658"],"is_preprint":false},{"year":2019,"finding":"miR-130b-3p directly targets DENND1A.V2 transcripts; decreased miR-130b-3p in PCOS theca cells correlates with increased DENND1A.V2 and CYP17A1 expression and androgen biosynthesis; miR-130b-3p mimic reduces DENND1A.V2 and CYP17A1 expression.","method":"Small RNA deep sequencing; miRNA mimic transfection in theca cells; RT-qPCR for target gene expression; Ingenuity Pathway Analysis","journal":"Endocrinology","confidence":"Medium","confidence_rationale":"Tier 3 — mimic experiment establishes functional link but direct 3'UTR reporter validation of targeting not described in abstract","pmids":["31184707"],"is_preprint":false},{"year":2019,"finding":"Homozygous Dennd1a knockout mice die around embryonic day 14.5, with brain defects including dysregulated cell division and survival in the telencephalon, ectopic Fgf8 expression, decreased active β-catenin and Axin2, impaired hepatic cell proliferation and differentiation, and disrupted primordial germ cell development, indicating Dennd1a is required for endocytic recycling that supports multiple developmental signaling pathways.","method":"Germline gene knockout mice; immunofluorescence; Western blot for β-catenin and Axin2; in situ hybridization for Fgf8; histological analysis of liver and brain","journal":"Developmental dynamics","confidence":"High","confidence_rationale":"Tier 2 — clean knockout with defined embryonic lethal phenotype and multiple molecular readouts across organ systems","pmids":["30884041"],"is_preprint":false},{"year":2020,"finding":"Human DENND1A.V2 transgenic mice (CMV-driven) show elevated Cyp17a1 mRNA in ovaries and adrenals, and increased steroid production by isolated theca interstitial cells, confirming the role of DENND1A.V2 in driving androgen biosynthesis in vivo.","method":"Transgenic mouse model (CMV, Lhcgr, TetOn promoters); RT-PCR for Cyp17a1 mRNA; steroid assays from isolated theca interstitial cells; immunohistochemistry","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo transgenic model with biochemical readout, but DENND1A.V2 protein not detectable by Western blot, limiting mechanistic resolution","pmids":["32268539"],"is_preprint":false},{"year":2018,"finding":"DENND1A activates Rab35 downstream of EGF signaling by forming a complex with the adaptor protein Grb2; DENND1A binds to the N-terminal and C-terminal SH3 domains of Grb2 via its PRD domain; EGFR recruits the Grb2-DENND1A complex upon EGF stimulation, and this pathway promotes gastric cancer cell migration and invasion.","method":"GST-pulldown; co-immunoprecipitation; siRNA knockdown of Rab35 and DENND1A; wound healing and transwell migration assays; Western blot","journal":"Frontiers in pharmacology","confidence":"Medium","confidence_rationale":"Tier 2 — reciprocal pulldown and Co-IP establish interaction; loss-of-function establishes functional consequence, but single lab","pmids":["30524285"],"is_preprint":false},{"year":2020,"finding":"DENND1A acts as a GEF for Rab35 and is required for proper podocalyxin (PODXL) trafficking to the apical membrane in 3D epithelial (MDCK) cyst cultures; DENND1A-knockout cysts display inverted PODXL localization similar to Rab35-knockout cysts; the DENN domain GEF activity is required for this trafficking function.","method":"DENND1A knockout in MDCK cells via CRISPR; 3D cyst culture; immunofluorescence for PODXL localization; domain mutant rescue experiments","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1–2 — genetic knockout with domain-specific rescue establishes GEF activity requirement; orthogonal imaging and functional readout","pmids":["31992598"],"is_preprint":false},{"year":2021,"finding":"Dennd1a in somatic cells of the fetal ovary is required for oogenesis and meiotic initiation: Dennd1a ablation disrupts expression of Sohlh2, Figla, Stra8, and Rec8; Dennd1a mediates Wnt5a synthesis (promoting early Sohlh2 expression) and retinoic acid production (inducing Stra8 and Rec8 for meiotic initiation) from somatic niche cells.","method":"Dennd1a knockout mice; ex vivo gonad culture with adenoviral shRNA knockdown; RT-PCR for oogenesis and meiosis marker genes","journal":"Frontiers in bioscience (Landmark edition)","confidence":"Medium","confidence_rationale":"Tier 2 — genetic loss-of-function in vivo and ex vivo with specific pathway markers, but mechanistic link to Wnt5a/RA production is correlative","pmids":["34994166"],"is_preprint":false},{"year":2022,"finding":"ZNF217, a zinc finger transcription factor, positively regulates miR-130b-3p expression and inversely regulates DENND1A.V2 and CYP17A1 mRNA in theca cells; forced ZNF217 expression in PCOS theca cells reduces androgen production, DENND1A.V2, and CYP17A1 mRNA while increasing miR-130b-3p; ZNF217 knockdown in normal theca cells increases DENND1A.V2 and CYP17A1.","method":"Forced expression (lentiviral overexpression) and shRNA knockdown of ZNF217 in primary theca cells; RT-qPCR for DENND1A.V2, CYP17A1, miR-130b-3p; androgen biosynthesis assay; Western blot; immunofluorescence","journal":"Journal of the Endocrine Society","confidence":"Medium","confidence_rationale":"Tier 2 — bidirectional gain/loss-of-function in primary cells; places DENND1A.V2 downstream of ZNF217 via miR-130b-3p, single lab","pmids":["35668995"],"is_preprint":false},{"year":2024,"finding":"DENND1A overexpression in granulosa cells promotes FSHR internalization and inhibits its recycling back to the plasma membrane, thereby desensitizing granulosa cells to FSH; transgenic mice overexpressing Dennd1a exhibit subfertility, irregular estrous cycles, smaller ovaries, fewer follicles, and diminished FSH responsiveness.","method":"Transgenic mouse model (Dennd1a overexpression); intracellular FSHR trafficking assay; ovarian histology; estrous cycle monitoring; hormone measurements; FSH response assays","journal":"Science China. Life sciences","confidence":"High","confidence_rationale":"Tier 2 — in vivo transgenic model combined with mechanistic trafficking assay establishes FSHR recycling as a direct target of DENND1A; multiple orthogonal readouts","pmids":["38709439"],"is_preprint":false},{"year":2025,"finding":"Increasing endogenous DENND1A expression via CRISPR-based epigenome editing of candidate regulatory elements in adrenal cells causes elevated testosterone production, directly linking DENND1A gene regulatory activity to androgen biosynthesis.","method":"High-throughput reporter assays; CRISPR-based epigenome editing; testosterone measurement in adrenal cell model; genetic association analysis","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1–2 — CRISPR epigenome editing combined with reporter assays and endogenous hormone measurement; multiple orthogonal methods","pmids":["40825976"],"is_preprint":false}],"current_model":"DENND1A encodes a GEF for the small GTPase Rab35 that regulates endocytic trafficking; in ovarian theca and adrenal cells, a truncated splice variant (DENND1A.V2) drives androgen biosynthesis by upregulating CYP17A1 and CYP11A1, is regulated post-transcriptionally by miR-130b-3p (itself controlled by the transcription factor ZNF217), and in granulosa cells acts by promoting FSHR internalization and inhibiting its recycling to desensitize cells to FSH, while the full-length protein is required for embryonic development through Rab35-dependent trafficking that supports Wnt, FGF, and retinoic acid signaling."},"narrative":{"teleology":[{"year":2014,"claim":"Establishing that a truncated DENND1A isoform (V2) is the molecular driver of excess theca cell androgen biosynthesis in PCOS resolved how a GWAS-implicated locus functionally contributes to hyperandrogenism.","evidence":"Bidirectional overexpression and siRNA knockdown in primary human theca cells with steroid hormone and CYP17A1/CYP11A1 mRNA readouts","pmids":["24706793"],"confidence":"High","gaps":["Mechanism by which DENND1A.V2 activates CYP17A1/CYP11A1 transcription is unknown","Whether the DENN GEF domain is required for the steroidogenic function was not tested","Upstream regulators of V2 expression in PCOS not identified"]},{"year":2016,"claim":"Defining the alternative splicing event (exon 20A from intron 20 exonization) that generates the DENND1A.V2 isoform explained how a single locus produces a truncated protein with distinct function in steroidogenic cells.","evidence":"Minigene constructs and RT-PCR in NCI-H295A adrenal cells; forced V2 expression upregulates CYP17A1/CYP11A1","pmids":["27297658"],"confidence":"High","gaps":["Splicing factors controlling exon 20A inclusion not identified","Relative expression levels of V2 vs full-length in different tissues not quantified"]},{"year":2018,"claim":"Demonstrating that DENND1A functions as a Rab35 GEF recruited to EGFR via Grb2 placed DENND1A within growth factor signaling and explained how Rab35 activation is coupled to receptor tyrosine kinase engagement.","evidence":"GST-pulldown, co-immunoprecipitation, and siRNA knockdown in gastric cancer cells with migration/invasion readouts","pmids":["30524285"],"confidence":"Medium","gaps":["In vivo relevance of EGFR–Grb2–DENND1A axis not established","Other RTKs that may recruit DENND1A not tested","Single-lab finding"]},{"year":2019,"claim":"Knockout of Dennd1a revealed that its Rab35-dependent trafficking is essential for embryonic viability and supports Wnt/β-catenin, FGF, and retinoic acid signaling across multiple organ systems, establishing its broad developmental role beyond steroidogenesis.","evidence":"Germline knockout mice; immunofluorescence, Western blot for β-catenin/Axin2, in situ hybridization for Fgf8; histological analysis of brain, liver, and primordial germ cells","pmids":["30884041"],"confidence":"High","gaps":["Which Rab35 effectors mediate each organ-specific phenotype is unknown","Whether V2 isoform contributes to developmental phenotype not addressed","Conditional knockouts needed to separate organ-autonomous effects"]},{"year":2019,"claim":"Identification of miR-130b-3p as a post-transcriptional repressor of DENND1A.V2 provided a regulatory mechanism explaining how V2 becomes derepressed in PCOS theca cells.","evidence":"Small RNA sequencing and miRNA mimic transfection in primary theca cells with RT-qPCR for DENND1A.V2 and CYP17A1","pmids":["31184707"],"confidence":"Medium","gaps":["Direct 3′UTR reporter validation of miR-130b-3p targeting not described","What causes miR-130b-3p downregulation in PCOS not yet known at this point"]},{"year":2020,"claim":"Demonstrating that DENND1A's DENN domain GEF activity is required for Rab35-dependent podocalyxin trafficking to the apical surface in 3D epithelial cysts established the precise enzymatic activity needed for its polarity function.","evidence":"CRISPR knockout in MDCK cells with 3D cyst culture; domain-mutant rescue; immunofluorescence for PODXL localization","pmids":["31992598"],"confidence":"High","gaps":["Whether DENND1A GEF activity is similarly required for its steroidogenic and developmental roles is unknown","Structural basis of DENN domain–Rab35 interaction not resolved"]},{"year":2020,"claim":"In vivo transgenic expression of human DENND1A.V2 confirmed its sufficiency to elevate Cyp17a1 and steroid production in murine ovaries and adrenals, validating the human cell culture findings in an animal model.","evidence":"Transgenic mice with CMV-driven DENND1A.V2; RT-PCR, steroid assays from isolated theca interstitial cells","pmids":["32268539"],"confidence":"Medium","gaps":["DENND1A.V2 protein not detectable by Western blot in transgenic tissues","Reproductive phenotype not fully characterized","Mechanism connecting V2 to CYP gene transcription still undefined"]},{"year":2022,"claim":"Placing DENND1A.V2 downstream of the ZNF217–miR-130b-3p axis completed a regulatory cascade (ZNF217 → miR-130b-3p ⊣ DENND1A.V2 → CYP17A1) that explains androgen overproduction in PCOS theca cells.","evidence":"Bidirectional lentiviral overexpression and shRNA knockdown of ZNF217 in primary theca cells; RT-qPCR and androgen biosynthesis assays","pmids":["35668995"],"confidence":"Medium","gaps":["Whether ZNF217 directly binds miR-130b-3p promoter not shown","Single-lab finding","Other miRNAs or RNA-binding proteins regulating V2 not explored"]},{"year":2024,"claim":"Showing that DENND1A promotes FSHR internalization while blocking its recycling in granulosa cells revealed a Rab35-related trafficking mechanism that desensitizes ovarian follicles to FSH, linking DENND1A to female fertility control.","evidence":"Transgenic Dennd1a-overexpressing mice; intracellular FSHR trafficking assays; ovarian histology, estrous cycle, and hormone measurements","pmids":["38709439"],"confidence":"High","gaps":["Whether Rab35 is the specific GTPase mediating FSHR trafficking not directly tested","Relationship between FSHR desensitization and the steroidogenic V2 isoform effect is unclear","Granulosa-specific conditional models not used"]},{"year":2025,"claim":"CRISPR-based epigenome editing of DENND1A regulatory elements in adrenal cells directly elevated testosterone, proving that endogenous DENND1A expression levels are rate-limiting for androgen biosynthesis and that PCOS-associated regulatory variants act through DENND1A.","evidence":"High-throughput reporter assays; CRISPRa/i epigenome editing in adrenal cells with testosterone measurement; genetic association analysis","pmids":["40825976"],"confidence":"High","gaps":["Specific cis-regulatory element–transcription factor interactions not fully mapped","Whether the same regulatory elements operate in theca cells not tested"]},{"year":null,"claim":"The mechanism by which DENND1A.V2 activates CYP17A1/CYP11A1 transcription remains undefined — whether it operates through Rab35 GEF activity, a trafficking-independent nuclear function, or its unique C-terminal domain is unknown.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structural data for V2-specific C-terminal domain","Nuclear vs. cytoplasmic site of action for steroidogenic function untested","Whether Rab35 activation is required for CYP gene induction has not been directly tested"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[5,6]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[5,6]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[5,6]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[6,9]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[6,9]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[6,9]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3,5,7]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[3,7]},{"term_id":"R-HSA-1474165","term_label":"Reproduction","supporting_discovery_ids":[7,9]}],"complexes":[],"partners":["RAB35","GRB2","EGFR","FSHR"],"other_free_text":[]},"mechanistic_narrative":"DENND1A is a guanine-nucleotide exchange factor (GEF) for the small GTPase Rab35 that controls endocytic trafficking critical for epithelial polarity, receptor recycling, and embryonic development. Through its DENN domain, DENND1A activates Rab35 to direct podocalyxin to the apical membrane in epithelial cysts and, downstream of EGF–Grb2 signaling, promotes cell migration; homozygous knockout in mice is embryonic lethal with defects in Wnt/β-catenin, FGF, and retinoic acid signaling across brain, liver, and germline [PMID:31992598, PMID:30524285, PMID:30884041, PMID:34994166]. A truncated splice variant, DENND1A.V2, generated by exonization of intronic sequences, is upregulated in polycystic ovary syndrome (PCOS) theca cells and drives excess androgen production by transcriptionally activating CYP17A1 and CYP11A1; its abundance is controlled post-transcriptionally by the ZNF217–miR-130b-3p axis [PMID:24706793, PMID:27297658, PMID:31184707, PMID:35668995, PMID:40825976]. In granulosa cells, DENND1A promotes FSH receptor internalization while inhibiting its recycling, desensitizing cells to FSH and causing subfertility when overexpressed in vivo [PMID:38709439]."},"prefetch_data":{"uniprot":{"accession":"Q8TEH3","full_name":"DENN domain-containing protein 1A","aliases":["Connecdenn 1","Connecdenn","Protein FAM31A"],"length_aa":1009,"mass_kda":110.6,"function":"Guanine nucleotide exchange factor (GEF) regulating clathrin-mediated endocytosis through RAB35 activation. Promotes the exchange of GDP to GTP, converting inactive GDP-bound RAB35 into its active GTP-bound form. Regulates clathrin-mediated endocytosis of synaptic vesicles and mediates exit from early endosomes (PubMed:20154091, PubMed:20937701). Binds phosphatidylinositol-phosphates (PtdInsPs), with some preference for PtdIns(3)P (By similarity)","subcellular_location":"Cytoplasmic vesicle, clathrin-coated vesicle membrane; Presynaptic cell membrane","url":"https://www.uniprot.org/uniprotkb/Q8TEH3/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/DENND1A","classification":"Not Classified","n_dependent_lines":6,"n_total_lines":1208,"dependency_fraction":0.004966887417218543},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/DENND1A","total_profiled":1310},"omim":[{"mim_id":"613634","title":"DENN/MADD DOMAIN-CONTAINING PROTEIN 1C; DENND1C","url":"https://www.omim.org/entry/613634"},{"mim_id":"613633","title":"DENN/MADD DOMAIN-CONTAINING PROTEIN 1A; DENND1A","url":"https://www.omim.org/entry/613633"},{"mim_id":"613292","title":"DENN/MADD DOMAIN-CONTAINING PROTEIN 1B; DENND1B","url":"https://www.omim.org/entry/613292"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Vesicles","reliability":"Approved"},{"location":"Cytosol","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/DENND1A"},"hgnc":{"alias_symbol":["FLJ21129","FAM31A"],"prev_symbol":["KIAA1608"]},"alphafold":{"accession":"Q8TEH3","domains":[{"cath_id":"3.30.450.200","chopping":"2-161","consensus_level":"medium","plddt":90.7652,"start":2,"end":161},{"cath_id":"-","chopping":"288-425","consensus_level":"medium","plddt":83.7236,"start":288,"end":425}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8TEH3","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q8TEH3-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q8TEH3-F1-predicted_aligned_error_v6.png","plddt_mean":60.34},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=DENND1A","jax_strain_url":"https://www.jax.org/strain/search?query=DENND1A"},"sequence":{"accession":"Q8TEH3","fasta_url":"https://rest.uniprot.org/uniprotkb/Q8TEH3.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q8TEH3/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8TEH3"}},"corpus_meta":[{"pmid":"24706793","id":"PMC_24706793","title":"Overexpression of a DENND1A isoform produces a polycystic ovary syndrome theca phenotype.","date":"2014","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/24706793","citation_count":170,"is_preprint":false},{"pmid":"22180642","id":"PMC_22180642","title":"Replication of association of DENND1A and THADA variants with polycystic ovary syndrome in European cohorts.","date":"2011","source":"Journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/22180642","citation_count":140,"is_preprint":false},{"pmid":"22547425","id":"PMC_22547425","title":"Variants in DENND1A are associated with polycystic ovary syndrome in women of European ancestry.","date":"2012","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/22547425","citation_count":116,"is_preprint":false},{"pmid":"31038695","id":"PMC_31038695","title":"Family-Based Quantitative Trait Meta-Analysis Implicates Rare Noncoding Variants in DENND1A in Polycystic Ovary Syndrome.","date":"2019","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/31038695","citation_count":55,"is_preprint":false},{"pmid":"32425888","id":"PMC_32425888","title":"PCOS-GWAS Susceptibility Variants in THADA, INSR, TOX3, and DENND1A Are Associated With Metabolic Syndrome or Insulin Resistance in Women With PCOS.","date":"2020","source":"Frontiers in endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/32425888","citation_count":44,"is_preprint":false},{"pmid":"31184707","id":"PMC_31184707","title":"miRNA Profiling Reveals miRNA-130b-3p Mediates DENND1A Variant 2 Expression and Androgen Biosynthesis.","date":"2019","source":"Endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/31184707","citation_count":37,"is_preprint":false},{"pmid":"24086769","id":"PMC_24086769","title":"Genetic alterations within the DENND1A gene in patients with polycystic ovary syndrome (PCOS).","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/24086769","citation_count":28,"is_preprint":false},{"pmid":"27297658","id":"PMC_27297658","title":"Alternative splicing of DENND1A, a PCOS candidate gene, generates variant 2.","date":"2016","source":"Molecular and cellular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/27297658","citation_count":28,"is_preprint":false},{"pmid":"36450691","id":"PMC_36450691","title":"Nimbin analog N2 alleviates high testosterone induced oxidative stress in CHO cells and alters the expression of Tox3 and Dennd1a signal transduction pathway involved in the PCOS zebrafish.","date":"2022","source":"Phytotherapy research : PTR","url":"https://pubmed.ncbi.nlm.nih.gov/36450691","citation_count":23,"is_preprint":false},{"pmid":"35668995","id":"PMC_35668995","title":"The PCOS GWAS Candidate Gene ZNF217 Influences Theca Cell Expression of DENND1A.V2, CYP17A1, and Androgen Production.","date":"2022","source":"Journal of the Endocrine Society","url":"https://pubmed.ncbi.nlm.nih.gov/35668995","citation_count":21,"is_preprint":false},{"pmid":"25626177","id":"PMC_25626177","title":"DENND1A gene variants in Bahraini Arab women with polycystic ovary syndrome.","date":"2015","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/25626177","citation_count":20,"is_preprint":false},{"pmid":"29325736","id":"PMC_29325736","title":"Differential association of DENND1A genetic variants with polycystic ovary syndrome in Tunisian but not Bahraini Arab women.","date":"2018","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/29325736","citation_count":18,"is_preprint":false},{"pmid":"32268539","id":"PMC_32268539","title":"Human DENND1A.V2 Drives Cyp17a1 Expression and Androgen Production in Mouse Ovaries and Adrenals.","date":"2020","source":"International journal of molecular 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Anatomists","url":"https://pubmed.ncbi.nlm.nih.gov/30884041","citation_count":13,"is_preprint":false},{"pmid":"26757598","id":"PMC_26757598","title":"Association of DENND1A Gene Polymorphisms with Polycystic Ovary Syndrome: A Meta-Analysis.","date":"2015","source":"Journal of clinical research in pediatric endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26757598","citation_count":12,"is_preprint":false},{"pmid":"31992598","id":"PMC_31992598","title":"Rab35-GEFs, DENND1A and folliculin differentially regulate podocalyxin trafficking in two- and three-dimensional epithelial cell cultures.","date":"2020","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/31992598","citation_count":9,"is_preprint":false},{"pmid":"31941453","id":"PMC_31941453","title":"Association analysis between the tag single nucleotide polymorphisms of DENND1A and the risk of polycystic ovary syndrome in Chinese Han women.","date":"2020","source":"BMC medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/31941453","citation_count":8,"is_preprint":false},{"pmid":"38759521","id":"PMC_38759521","title":"Tanshinone IIA from Salvia miltiorrhiza alleviates follicular maturation arrest symptoms in zebrafish via binding to the human androgen receptors and modulating Tox3 and Dennd1a.","date":"2024","source":"Tissue & cell","url":"https://pubmed.ncbi.nlm.nih.gov/38759521","citation_count":6,"is_preprint":false},{"pmid":"29727258","id":"PMC_29727258","title":"Association study between variants in LHCGR DENND1A and THADA with preeclampsia risk in Han Chinese populations.","date":"2018","source":"The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians","url":"https://pubmed.ncbi.nlm.nih.gov/29727258","citation_count":6,"is_preprint":false},{"pmid":"40825976","id":"PMC_40825976","title":"Gene regulatory activity associated with polycystic ovary syndrome revealed DENND1A-dependent testosterone production.","date":"2025","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/40825976","citation_count":4,"is_preprint":false},{"pmid":"36350975","id":"PMC_36350975","title":"Association of FSHR and DENND1A polymorphisms with polycystic ovary syndrome: a meta-analysis.","date":"2023","source":"JBRA assisted reproduction","url":"https://pubmed.ncbi.nlm.nih.gov/36350975","citation_count":4,"is_preprint":false},{"pmid":"30232779","id":"PMC_30232779","title":"The role of DENND1A and CYP19A1 gene variants in individual susceptibility to obesity in Turkish population-a preliminary study.","date":"2018","source":"Molecular biology reports","url":"https://pubmed.ncbi.nlm.nih.gov/30232779","citation_count":4,"is_preprint":false},{"pmid":"38709439","id":"PMC_38709439","title":"DENND1A desensitizes granulosa cells to FSH by arresting intracellular FSHR transportation.","date":"2024","source":"Science China. Life sciences","url":"https://pubmed.ncbi.nlm.nih.gov/38709439","citation_count":2,"is_preprint":false},{"pmid":"34994166","id":"PMC_34994166","title":"Initiation of oogenesis and meiosis in the fetal ovary depends on Dennd1a-mediated production of Wnt5a and retinoic acid from the somatic niches.","date":"2021","source":"Frontiers in bioscience (Landmark edition)","url":"https://pubmed.ncbi.nlm.nih.gov/34994166","citation_count":1,"is_preprint":false},{"pmid":"37870708","id":"PMC_37870708","title":"Unraveling the Genetic Associations of DENND1A (rs9696009) and ERBB4 (rs2178575) with Infertile Polycystic Ovary Syndrome Females in Pakistan.","date":"2023","source":"Biochemical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/37870708","citation_count":1,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.05.23.595551","title":"Gene regulatory activity associated with PCOS revealed<i>DENND1A</i>-dependent testosterone production","date":"2024-05-28","source":"bioRxiv","url":"https://doi.org/10.1101/2024.05.23.595551","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":18239,"output_tokens":3002,"usd":0.049874},"stage2":{"model":"claude-opus-4-6","input_tokens":6340,"output_tokens":2959,"usd":0.158513},"total_usd":0.208387,"stage1_batch_id":"msgbatch_0118RScg3WGaGkaZRtWZbtce","stage2_batch_id":"msgbatch_01Cpfzvtbj42aqp5oYZ5Te2s","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2014,\n      \"finding\": \"DENND1A variant 2 (DENND1A.V2), a truncated isoform, is upregulated in PCOS theca cells and drives augmented CYP17A1 and CYP11A1 gene transcription and androgen biosynthesis; forced overexpression in normal theca cells confers a PCOS phenotype, and knockdown in PCOS theca cells reduces androgen biosynthesis.\",\n      \"method\": \"Overexpression and siRNA knockdown in primary human theca cells; mRNA quantification and steroid hormone measurement; IgG-mediated neutralization experiment\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — bidirectional loss- and gain-of-function in primary human cells with specific molecular and biochemical readouts; replicated across multiple approaches in same study\",\n      \"pmids\": [\"24706793\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"DENND1A.V2 is produced by alternative splicing through exonization of sequences in intron 20, generating a unique exon 20A that encodes the C-terminus of V2; forced V2 expression in adrenal NCI-H295A cells increases CYP17A1 and CYP11A1 mRNA.\",\n      \"method\": \"Minigene expression vectors; RT-PCR; forced overexpression in NCI-H295A adrenal cells with mRNA quantification\",\n      \"journal\": \"Molecular and cellular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — molecular characterization of splicing mechanism combined with functional overexpression assay in adrenal cells\",\n      \"pmids\": [\"27297658\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"miR-130b-3p directly targets DENND1A.V2 transcripts; decreased miR-130b-3p in PCOS theca cells correlates with increased DENND1A.V2 and CYP17A1 expression and androgen biosynthesis; miR-130b-3p mimic reduces DENND1A.V2 and CYP17A1 expression.\",\n      \"method\": \"Small RNA deep sequencing; miRNA mimic transfection in theca cells; RT-qPCR for target gene expression; Ingenuity Pathway Analysis\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — mimic experiment establishes functional link but direct 3'UTR reporter validation of targeting not described in abstract\",\n      \"pmids\": [\"31184707\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Homozygous Dennd1a knockout mice die around embryonic day 14.5, with brain defects including dysregulated cell division and survival in the telencephalon, ectopic Fgf8 expression, decreased active β-catenin and Axin2, impaired hepatic cell proliferation and differentiation, and disrupted primordial germ cell development, indicating Dennd1a is required for endocytic recycling that supports multiple developmental signaling pathways.\",\n      \"method\": \"Germline gene knockout mice; immunofluorescence; Western blot for β-catenin and Axin2; in situ hybridization for Fgf8; histological analysis of liver and brain\",\n      \"journal\": \"Developmental dynamics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean knockout with defined embryonic lethal phenotype and multiple molecular readouts across organ systems\",\n      \"pmids\": [\"30884041\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Human DENND1A.V2 transgenic mice (CMV-driven) show elevated Cyp17a1 mRNA in ovaries and adrenals, and increased steroid production by isolated theca interstitial cells, confirming the role of DENND1A.V2 in driving androgen biosynthesis in vivo.\",\n      \"method\": \"Transgenic mouse model (CMV, Lhcgr, TetOn promoters); RT-PCR for Cyp17a1 mRNA; steroid assays from isolated theca interstitial cells; immunohistochemistry\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo transgenic model with biochemical readout, but DENND1A.V2 protein not detectable by Western blot, limiting mechanistic resolution\",\n      \"pmids\": [\"32268539\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"DENND1A activates Rab35 downstream of EGF signaling by forming a complex with the adaptor protein Grb2; DENND1A binds to the N-terminal and C-terminal SH3 domains of Grb2 via its PRD domain; EGFR recruits the Grb2-DENND1A complex upon EGF stimulation, and this pathway promotes gastric cancer cell migration and invasion.\",\n      \"method\": \"GST-pulldown; co-immunoprecipitation; siRNA knockdown of Rab35 and DENND1A; wound healing and transwell migration assays; Western blot\",\n      \"journal\": \"Frontiers in pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal pulldown and Co-IP establish interaction; loss-of-function establishes functional consequence, but single lab\",\n      \"pmids\": [\"30524285\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"DENND1A acts as a GEF for Rab35 and is required for proper podocalyxin (PODXL) trafficking to the apical membrane in 3D epithelial (MDCK) cyst cultures; DENND1A-knockout cysts display inverted PODXL localization similar to Rab35-knockout cysts; the DENN domain GEF activity is required for this trafficking function.\",\n      \"method\": \"DENND1A knockout in MDCK cells via CRISPR; 3D cyst culture; immunofluorescence for PODXL localization; domain mutant rescue experiments\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — genetic knockout with domain-specific rescue establishes GEF activity requirement; orthogonal imaging and functional readout\",\n      \"pmids\": [\"31992598\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Dennd1a in somatic cells of the fetal ovary is required for oogenesis and meiotic initiation: Dennd1a ablation disrupts expression of Sohlh2, Figla, Stra8, and Rec8; Dennd1a mediates Wnt5a synthesis (promoting early Sohlh2 expression) and retinoic acid production (inducing Stra8 and Rec8 for meiotic initiation) from somatic niche cells.\",\n      \"method\": \"Dennd1a knockout mice; ex vivo gonad culture with adenoviral shRNA knockdown; RT-PCR for oogenesis and meiosis marker genes\",\n      \"journal\": \"Frontiers in bioscience (Landmark edition)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function in vivo and ex vivo with specific pathway markers, but mechanistic link to Wnt5a/RA production is correlative\",\n      \"pmids\": [\"34994166\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ZNF217, a zinc finger transcription factor, positively regulates miR-130b-3p expression and inversely regulates DENND1A.V2 and CYP17A1 mRNA in theca cells; forced ZNF217 expression in PCOS theca cells reduces androgen production, DENND1A.V2, and CYP17A1 mRNA while increasing miR-130b-3p; ZNF217 knockdown in normal theca cells increases DENND1A.V2 and CYP17A1.\",\n      \"method\": \"Forced expression (lentiviral overexpression) and shRNA knockdown of ZNF217 in primary theca cells; RT-qPCR for DENND1A.V2, CYP17A1, miR-130b-3p; androgen biosynthesis assay; Western blot; immunofluorescence\",\n      \"journal\": \"Journal of the Endocrine Society\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — bidirectional gain/loss-of-function in primary cells; places DENND1A.V2 downstream of ZNF217 via miR-130b-3p, single lab\",\n      \"pmids\": [\"35668995\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"DENND1A overexpression in granulosa cells promotes FSHR internalization and inhibits its recycling back to the plasma membrane, thereby desensitizing granulosa cells to FSH; transgenic mice overexpressing Dennd1a exhibit subfertility, irregular estrous cycles, smaller ovaries, fewer follicles, and diminished FSH responsiveness.\",\n      \"method\": \"Transgenic mouse model (Dennd1a overexpression); intracellular FSHR trafficking assay; ovarian histology; estrous cycle monitoring; hormone measurements; FSH response assays\",\n      \"journal\": \"Science China. Life sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vivo transgenic model combined with mechanistic trafficking assay establishes FSHR recycling as a direct target of DENND1A; multiple orthogonal readouts\",\n      \"pmids\": [\"38709439\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Increasing endogenous DENND1A expression via CRISPR-based epigenome editing of candidate regulatory elements in adrenal cells causes elevated testosterone production, directly linking DENND1A gene regulatory activity to androgen biosynthesis.\",\n      \"method\": \"High-throughput reporter assays; CRISPR-based epigenome editing; testosterone measurement in adrenal cell model; genetic association analysis\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — CRISPR epigenome editing combined with reporter assays and endogenous hormone measurement; multiple orthogonal methods\",\n      \"pmids\": [\"40825976\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"DENND1A encodes a GEF for the small GTPase Rab35 that regulates endocytic trafficking; in ovarian theca and adrenal cells, a truncated splice variant (DENND1A.V2) drives androgen biosynthesis by upregulating CYP17A1 and CYP11A1, is regulated post-transcriptionally by miR-130b-3p (itself controlled by the transcription factor ZNF217), and in granulosa cells acts by promoting FSHR internalization and inhibiting its recycling to desensitize cells to FSH, while the full-length protein is required for embryonic development through Rab35-dependent trafficking that supports Wnt, FGF, and retinoic acid signaling.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"DENND1A is a guanine-nucleotide exchange factor (GEF) for the small GTPase Rab35 that controls endocytic trafficking critical for epithelial polarity, receptor recycling, and embryonic development. Through its DENN domain, DENND1A activates Rab35 to direct podocalyxin to the apical membrane in epithelial cysts and, downstream of EGF–Grb2 signaling, promotes cell migration; homozygous knockout in mice is embryonic lethal with defects in Wnt/β-catenin, FGF, and retinoic acid signaling across brain, liver, and germline [PMID:31992598, PMID:30524285, PMID:30884041, PMID:34994166]. A truncated splice variant, DENND1A.V2, generated by exonization of intronic sequences, is upregulated in polycystic ovary syndrome (PCOS) theca cells and drives excess androgen production by transcriptionally activating CYP17A1 and CYP11A1; its abundance is controlled post-transcriptionally by the ZNF217–miR-130b-3p axis [PMID:24706793, PMID:27297658, PMID:31184707, PMID:35668995, PMID:40825976]. In granulosa cells, DENND1A promotes FSH receptor internalization while inhibiting its recycling, desensitizing cells to FSH and causing subfertility when overexpressed in vivo [PMID:38709439].\",\n  \"teleology\": [\n    {\n      \"year\": 2014,\n      \"claim\": \"Establishing that a truncated DENND1A isoform (V2) is the molecular driver of excess theca cell androgen biosynthesis in PCOS resolved how a GWAS-implicated locus functionally contributes to hyperandrogenism.\",\n      \"evidence\": \"Bidirectional overexpression and siRNA knockdown in primary human theca cells with steroid hormone and CYP17A1/CYP11A1 mRNA readouts\",\n      \"pmids\": [\"24706793\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which DENND1A.V2 activates CYP17A1/CYP11A1 transcription is unknown\", \"Whether the DENN GEF domain is required for the steroidogenic function was not tested\", \"Upstream regulators of V2 expression in PCOS not identified\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Defining the alternative splicing event (exon 20A from intron 20 exonization) that generates the DENND1A.V2 isoform explained how a single locus produces a truncated protein with distinct function in steroidogenic cells.\",\n      \"evidence\": \"Minigene constructs and RT-PCR in NCI-H295A adrenal cells; forced V2 expression upregulates CYP17A1/CYP11A1\",\n      \"pmids\": [\"27297658\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Splicing factors controlling exon 20A inclusion not identified\", \"Relative expression levels of V2 vs full-length in different tissues not quantified\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Demonstrating that DENND1A functions as a Rab35 GEF recruited to EGFR via Grb2 placed DENND1A within growth factor signaling and explained how Rab35 activation is coupled to receptor tyrosine kinase engagement.\",\n      \"evidence\": \"GST-pulldown, co-immunoprecipitation, and siRNA knockdown in gastric cancer cells with migration/invasion readouts\",\n      \"pmids\": [\"30524285\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo relevance of EGFR–Grb2–DENND1A axis not established\", \"Other RTKs that may recruit DENND1A not tested\", \"Single-lab finding\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Knockout of Dennd1a revealed that its Rab35-dependent trafficking is essential for embryonic viability and supports Wnt/β-catenin, FGF, and retinoic acid signaling across multiple organ systems, establishing its broad developmental role beyond steroidogenesis.\",\n      \"evidence\": \"Germline knockout mice; immunofluorescence, Western blot for β-catenin/Axin2, in situ hybridization for Fgf8; histological analysis of brain, liver, and primordial germ cells\",\n      \"pmids\": [\"30884041\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Which Rab35 effectors mediate each organ-specific phenotype is unknown\", \"Whether V2 isoform contributes to developmental phenotype not addressed\", \"Conditional knockouts needed to separate organ-autonomous effects\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Identification of miR-130b-3p as a post-transcriptional repressor of DENND1A.V2 provided a regulatory mechanism explaining how V2 becomes derepressed in PCOS theca cells.\",\n      \"evidence\": \"Small RNA sequencing and miRNA mimic transfection in primary theca cells with RT-qPCR for DENND1A.V2 and CYP17A1\",\n      \"pmids\": [\"31184707\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct 3′UTR reporter validation of miR-130b-3p targeting not described\", \"What causes miR-130b-3p downregulation in PCOS not yet known at this point\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Demonstrating that DENND1A's DENN domain GEF activity is required for Rab35-dependent podocalyxin trafficking to the apical surface in 3D epithelial cysts established the precise enzymatic activity needed for its polarity function.\",\n      \"evidence\": \"CRISPR knockout in MDCK cells with 3D cyst culture; domain-mutant rescue; immunofluorescence for PODXL localization\",\n      \"pmids\": [\"31992598\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether DENND1A GEF activity is similarly required for its steroidogenic and developmental roles is unknown\", \"Structural basis of DENN domain–Rab35 interaction not resolved\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"In vivo transgenic expression of human DENND1A.V2 confirmed its sufficiency to elevate Cyp17a1 and steroid production in murine ovaries and adrenals, validating the human cell culture findings in an animal model.\",\n      \"evidence\": \"Transgenic mice with CMV-driven DENND1A.V2; RT-PCR, steroid assays from isolated theca interstitial cells\",\n      \"pmids\": [\"32268539\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"DENND1A.V2 protein not detectable by Western blot in transgenic tissues\", \"Reproductive phenotype not fully characterized\", \"Mechanism connecting V2 to CYP gene transcription still undefined\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Placing DENND1A.V2 downstream of the ZNF217–miR-130b-3p axis completed a regulatory cascade (ZNF217 → miR-130b-3p ⊣ DENND1A.V2 → CYP17A1) that explains androgen overproduction in PCOS theca cells.\",\n      \"evidence\": \"Bidirectional lentiviral overexpression and shRNA knockdown of ZNF217 in primary theca cells; RT-qPCR and androgen biosynthesis assays\",\n      \"pmids\": [\"35668995\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether ZNF217 directly binds miR-130b-3p promoter not shown\", \"Single-lab finding\", \"Other miRNAs or RNA-binding proteins regulating V2 not explored\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Showing that DENND1A promotes FSHR internalization while blocking its recycling in granulosa cells revealed a Rab35-related trafficking mechanism that desensitizes ovarian follicles to FSH, linking DENND1A to female fertility control.\",\n      \"evidence\": \"Transgenic Dennd1a-overexpressing mice; intracellular FSHR trafficking assays; ovarian histology, estrous cycle, and hormone measurements\",\n      \"pmids\": [\"38709439\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Rab35 is the specific GTPase mediating FSHR trafficking not directly tested\", \"Relationship between FSHR desensitization and the steroidogenic V2 isoform effect is unclear\", \"Granulosa-specific conditional models not used\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"CRISPR-based epigenome editing of DENND1A regulatory elements in adrenal cells directly elevated testosterone, proving that endogenous DENND1A expression levels are rate-limiting for androgen biosynthesis and that PCOS-associated regulatory variants act through DENND1A.\",\n      \"evidence\": \"High-throughput reporter assays; CRISPRa/i epigenome editing in adrenal cells with testosterone measurement; genetic association analysis\",\n      \"pmids\": [\"40825976\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Specific cis-regulatory element–transcription factor interactions not fully mapped\", \"Whether the same regulatory elements operate in theca cells not tested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The mechanism by which DENND1A.V2 activates CYP17A1/CYP11A1 transcription remains undefined — whether it operates through Rab35 GEF activity, a trafficking-independent nuclear function, or its unique C-terminal domain is unknown.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural data for V2-specific C-terminal domain\", \"Nuclear vs. cytoplasmic site of action for steroidogenic function untested\", \"Whether Rab35 activation is required for CYP gene induction has not been directly tested\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [5, 6]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [5, 6]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [5, 6]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [6, 9]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [6, 9]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [6, 9]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3, 5, 7]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [3, 7]},\n      {\"term_id\": \"R-HSA-1474165\", \"supporting_discovery_ids\": [7, 9]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"RAB35\",\n      \"GRB2\",\n      \"EGFR\",\n      \"FSHR\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}