{"gene":"DENND1A","run_date":"2026-06-09T23:54:42","timeline":{"discoveries":[{"year":2014,"finding":"DENND1A variant 2 (DENND1A.V2), a truncated isoform, is elevated in PCOS theca cells and drives augmented CYP17A1 and CYP11A1 gene transcription and androgen biosynthesis. Forced overexpression of DENND1A.V2 in normal theca cells conferred a PCOS phenotype of increased androgen production; knockdown in PCOS theca cells reduced androgen biosynthesis and CYP17A1/CYP11A1 mRNA.","method":"Overexpression and siRNA knockdown in primary human theca cells with mRNA/protein quantification and androgen biosynthesis assays","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal gain- and loss-of-function experiments in primary human cells with defined molecular and biochemical readouts, replicated across studies","pmids":["24706793"],"is_preprint":false},{"year":2016,"finding":"DENND1A variant 2 (DENND1A.V2) is generated by alternative splicing via exonization of intronic sequences (intron 20), producing a unique exon 20A that encodes the unique C-terminus of the 559-amino-acid isoform. Forced expression of V2 in adrenal NCI-H295A cells increased CYP17A1 and CYP11A1 mRNAs, consistent with its role in androgen biosynthesis.","method":"Minigene expression vectors, sequencing, RT-PCR in NCI-H295A cells, overexpression assay","journal":"Molecular and cellular endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — splicing mechanism defined by minigene assay and sequencing; functional consequence confirmed by overexpression in adrenal cell line, single lab","pmids":["27297658"],"is_preprint":false},{"year":2018,"finding":"DENND1A interacts with the N-terminal and C-terminal SH3 domains of the adaptor protein Grb2 through its proline-rich domain (PRD). Upon EGF stimulation, EGFR recruits the Grb2-DENND1A complex, leading to Rab35 activation and promotion of gastric cancer cell migration and invasion.","method":"GST-pulldown, co-immunoprecipitation, Rab35 activation assay (GST-pulldown), siRNA knockdown with wound healing and transwell migration assays","journal":"Frontiers in pharmacology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal binding confirmed by GST-pulldown and Co-IP; functional consequence shown by loss-of-function migration assay; single lab","pmids":["30524285"],"is_preprint":false},{"year":2019,"finding":"miR-130b-3p targets DENND1A.V2 transcripts post-transcriptionally. miR-130b-3p expression is decreased in PCOS theca cells, correlating with increased DENND1A.V2 and CYP17A1 mRNA. miR-130b-3p mimic transfection reduced DENND1A.V2 and CYP17A1 expression and androgen biosynthesis.","method":"Small RNA deep sequencing (miR-seq), miR-130b-3p mimic transfection in theca cells, RT-qPCR for DENND1A.V2 and CYP17A1","journal":"Endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mimic overexpression with defined mRNA target and functional readout; single lab, two orthogonal methods (sequencing + functional mimic assay)","pmids":["31184707"],"is_preprint":false},{"year":2019,"finding":"Homozygous Dennd1a knockout mice die around embryonic day 14.5, exhibiting defects in brain development (dysregulated cell division and survival in telencephalon with ectopic Fgf8 expression and decreased active β-catenin/Axin2), impaired hepatic cell proliferation and differentiation, and loss of primordial germ cells. These phenotypes implicate DENND1A in endocytic recycling of cargos essential for developmental signaling.","method":"Dennd1a knockout mouse model, embryonic lethality assessment, immunostaining, mRNA expression analysis, histology","journal":"Developmental dynamics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean knockout with defined embryonic phenotypes and pathway markers; single lab","pmids":["30884041"],"is_preprint":false},{"year":2020,"finding":"DENND1A (via its DENN domain GEF activity toward Rab35) is required for proper apical trafficking of podocalyxin (PODXL) in three-dimensional MDCK epithelial cysts but not in two-dimensional cultures. DENND1A-knockout cysts showed inverted (basolateral) PODXL localization similar to Rab35-knockout cysts; FLCN rather than DENND1A was required for Rab35-dependent PODXL trafficking in 2D cultures. The DENN domain GEF activity was required for this function.","method":"DENND1A knockout MDCK cells in 3D and 2D culture, immunofluorescence localization of PODXL, DENN domain mutant rescue experiments","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — knockout combined with domain mutant rescue and orthogonal culture-condition comparison; establishes GEF activity requirement with structural domain validation","pmids":["31992598"],"is_preprint":false},{"year":2020,"finding":"Human DENND1A.V2 transgenic mice (CMV promoter) showed elevated Cyp17a1 mRNA in ovaries and adrenals, and increased steroid production from isolated theca interstitial cells, consistent with a role of DENND1A.V2 in upregulating androgen biosynthetic enzymes in vivo. Murine Dennd1a knockout is embryonically lethal, and there is no endogenous mouse equivalent of the V2 isoform.","method":"Transgenic mouse overexpression (CMV, Lhcgr, TetOn promoters), immunohistochemistry, RT-qPCR, theca interstitial cell steroid production assay","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo transgenic with defined mRNA and steroid readouts; protein detection was weak (IHC only); single lab","pmids":["32268539"],"is_preprint":false},{"year":2021,"finding":"In the fetal mouse ovary, Dennd1a in somatic cells regulates oogenesis and meiosis by controlling production of Wnt5a (required for Sohlh2 expression and early oocyte differentiation) and retinoic acid (required for meiotic initiation via Stra8 and Rec8 expression). Ex vivo adenoviral shRNA knockdown of Dennd1a in E12.5 female gonads blocked activation of Sohlh2, Figla, Stra8, and Rec8 transcription.","method":"Dennd1a knockout mice, ex vivo fetal gonad culture with adenoviral shRNA knockdown, RT-qPCR for oogenesis/meiosis markers","journal":"Frontiers in bioscience (Landmark edition)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ex vivo knockdown with defined pathway markers; single lab, two orthogonal approaches (KO mice + shRNA in organ culture)","pmids":["34994166"],"is_preprint":false},{"year":2022,"finding":"ZNF217, a PCOS GWAS candidate gene and transcription factor, inversely regulates DENND1A.V2 expression in theca cells. ZNF217 overexpression in PCOS theca cells reduced DENND1A.V2 mRNA, CYP17A1 mRNA, and androgen production while increasing miR-130b-3p; ZNF217 knockdown in normal theca cells increased DENND1A.V2 and CYP17A1 mRNA. The effect is proposed to be mediated by miR-130b-3p targeting DENND1A.V2.","method":"ZNF217 overexpression and shRNA lentiviral knockdown in primary human theca cells, RT-qPCR, Western blot, androgen biosynthesis assay","journal":"Journal of the Endocrine Society","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal gain/loss-of-function in primary cells with defined molecular readouts; single lab","pmids":["35668995"],"is_preprint":false},{"year":2024,"finding":"DENND1A overexpression in granulosa cells disrupts intracellular trafficking of follicle-stimulating hormone receptor (FSHR) by promoting its internalization and inhibiting recycling back to the cell surface, thereby desensitizing granulosa cells to FSH. Transgenic mice overexpressing Dennd1a showed subfertility, irregular estrous cycles, smaller ovaries, poorly developed follicles, increased testosterone after PMSG stimulation, and diminished FSH-priming gene expression.","method":"Dennd1a transgenic mouse model, FSHR trafficking assay (internalization/recycling), ovarian histology, hormone measurements, FSH-priming gene expression","journal":"Science China. Life sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo transgenic with defined trafficking mechanism (receptor internalization/recycling) and multiple phenotypic readouts; single lab","pmids":["38709439"],"is_preprint":false},{"year":2025,"finding":"Increasing endogenous DENND1A expression by perturbing candidate regulatory elements (identified via high-throughput reporter assays and CRISPR-based epigenome editing) causes elevated testosterone levels in an adrenal cell model, establishing a causal link between DENND1A expression level and androgen biosynthesis.","method":"High-throughput reporter assays (MPRA), CRISPR-based epigenome editing of regulatory elements, testosterone measurement in adrenal cell model","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — CRISPR epigenome editing with defined hormonal readout; single study with orthogonal regulatory and functional assays","pmids":["40825976"],"is_preprint":false}],"current_model":"DENND1A encodes a Rab35 guanine nucleotide exchange factor (GEF) that regulates endocytic recycling of membrane receptors (including FSHR and podocalyxin) via its DENN domain; a truncated splice isoform (DENND1A.V2, generated by exonization of intron 20) is upregulated in PCOS theca cells downstream of reduced miR-130b-3p and ZNF217, driving transcription of CYP17A1 and CYP11A1 to increase androgen biosynthesis, while full-length DENND1A is required for embryogenesis (Wnt/β-catenin and retinoic acid signaling), oogenesis/meiosis initiation in the fetal ovary, and FSH receptor recycling in granulosa cells."},"narrative":{"mechanistic_narrative":"DENND1A is a Rab35 guanine nucleotide exchange factor whose DENN domain GEF activity drives endocytic recycling of specific membrane cargos required for epithelial polarity and developmental signaling [PMID:31992598]. Its DENN domain activates Rab35 to direct apical trafficking of podocalyxin in three-dimensional epithelial cysts, a function abolished by GEF-dead domain mutants [PMID:31992598], and the same GEF axis is engaged downstream of EGFR via a Grb2 interaction—mediated by the DENND1A proline-rich domain binding the Grb2 SH3 domains—to promote cell migration and invasion [PMID:30524285]. In the female reproductive system, full-length DENND1A is required for embryogenesis, with knockout causing embryonic lethality, defective Wnt/β-catenin-dependent brain and hepatic development, and loss of primordial germ cells [PMID:30884041], and for somatic-cell control of fetal oogenesis and meiotic initiation through Wnt5a- and retinoic acid-dependent activation of Sohlh2, Stra8, and Rec8 [PMID:34994166]; in granulosa cells DENND1A overexpression desensitizes cells to FSH by accelerating FSH receptor internalization and blocking its recycling [PMID:38709439]. A truncated splice isoform, DENND1A.V2—generated by exonization of intron 20 to create a unique C-terminus [PMID:27297658]—is elevated in PCOS theca cells, where it drives transcription of the androgen biosynthetic enzymes CYP17A1 and CYP11A1 and increases androgen production [PMID:24706793]; this isoform is held in check by miR-130b-3p, itself controlled by the transcription factor ZNF217, so that loss of this regulatory axis raises DENND1A.V2 and androgen output [PMID:31184707, PMID:35668995]. Manipulation of endogenous DENND1A regulatory elements causally elevates testosterone in adrenal cells, confirming DENND1A expression level as a determinant of androgen biosynthesis [PMID:40825976].","teleology":[{"year":2014,"claim":"Established that a DENND1A isoform, rather than the gene generically, is the functional driver of the PCOS theca-cell androgen excess phenotype.","evidence":"Reciprocal overexpression and siRNA knockdown of DENND1A.V2 in primary human theca cells with androgen biosynthesis and CYP17A1/CYP11A1 readouts","pmids":["24706793"],"confidence":"High","gaps":["Did not define how V2 is generated at the transcript level","Mechanism linking V2 to steroidogenic gene transcription not resolved"]},{"year":2016,"claim":"Defined the molecular origin of the disease-associated isoform, showing V2 arises by exonization of intron 20 to encode a unique truncated C-terminus.","evidence":"Minigene expression vectors, sequencing, and RT-PCR with overexpression in NCI-H295A adrenal cells","pmids":["27297658"],"confidence":"Medium","gaps":["Single lab","How the unique C-terminus mechanistically alters function versus full-length protein unknown"]},{"year":2018,"claim":"Connected DENND1A to receptor tyrosine kinase signaling, showing it is recruited via Grb2 to activate Rab35 and promote tumor cell motility.","evidence":"GST-pulldown and Co-IP mapping the PRD–Grb2 SH3 interaction, Rab35 activation assay, and knockdown migration/invasion assays in gastric cancer cells","pmids":["30524285"],"confidence":"Medium","gaps":["Single lab","Cargo recycled downstream of Rab35 in this context not identified"]},{"year":2019,"claim":"Demonstrated full-length DENND1A is essential for embryogenesis and links its function to developmental signaling pathways.","evidence":"Homozygous Dennd1a knockout mouse with embryonic lethality, histology, and Wnt/β-catenin and Fgf8 pathway marker analysis","pmids":["30884041"],"confidence":"Medium","gaps":["Specific recycled cargos underlying each developmental defect not identified","Single lab"]},{"year":2019,"claim":"Identified an upstream post-transcriptional brake on the androgenic isoform, explaining why V2 is elevated in PCOS.","evidence":"miR-seq and miR-130b-3p mimic transfection in theca cells with DENND1A.V2/CYP17A1 and androgen readouts","pmids":["31184707"],"confidence":"Medium","gaps":["Direct target-site binding not validated by reporter assay","Single lab"]},{"year":2020,"claim":"Provided definitive mechanistic proof that DENND1A acts through DENN-domain GEF activity on Rab35 for cargo-specific apical trafficking.","evidence":"DENND1A-knockout MDCK 3D/2D cysts, PODXL localization imaging, and GEF-dead domain mutant rescue","pmids":["31992598"],"confidence":"High","gaps":["Context-specificity (3D vs 2D, FLCN vs DENND1A) mechanism incompletely defined"]},{"year":2020,"claim":"Tested the androgenic isoform in vivo, showing transgenic V2 raises steroidogenic enzyme expression and steroid output.","evidence":"Human DENND1A.V2 transgenic mice with ovary/adrenal Cyp17a1 mRNA and theca interstitial cell steroid assays","pmids":["32268539"],"confidence":"Medium","gaps":["Weak protein-level detection (IHC only)","No endogenous mouse V2 equivalent, limiting physiological modeling"]},{"year":2021,"claim":"Established a somatic-cell role for DENND1A in fetal ovary development controlling oogenesis and meiotic initiation.","evidence":"Dennd1a knockout mice plus ex vivo adenoviral shRNA knockdown in E12.5 gonads with Sohlh2/Figla/Stra8/Rec8 marker analysis","pmids":["34994166"],"confidence":"Medium","gaps":["How DENND1A trafficking controls Wnt5a and retinoic acid production not mechanistically resolved","Single lab"]},{"year":2022,"claim":"Placed a GWAS-implicated transcription factor upstream of the V2/miR-130b-3p axis, building a regulatory hierarchy for androgen excess.","evidence":"ZNF217 overexpression and lentiviral knockdown in primary human theca cells with DENND1A.V2, CYP17A1, miR-130b-3p, and androgen readouts","pmids":["35668995"],"confidence":"Medium","gaps":["Direct ZNF217 regulation of miR-130b-3p versus DENND1A not distinguished mechanistically","Single lab"]},{"year":2024,"claim":"Identified a granulosa-cell mechanism whereby DENND1A dosage disrupts FSH responsiveness through receptor trafficking.","evidence":"Dennd1a transgenic mice with FSHR internalization/recycling assays, ovarian histology, hormone measurement, and FSH-priming gene expression","pmids":["38709439"],"confidence":"Medium","gaps":["Whether Rab35 GEF activity mediates the FSHR effect not tested","Single lab"]},{"year":2025,"claim":"Demonstrated a causal, dose-dependent link between endogenous DENND1A expression level and androgen biosynthesis via regulatory-element perturbation.","evidence":"MPRA and CRISPR-based epigenome editing of regulatory elements with testosterone measurement in an adrenal cell model","pmids":["40825976"],"confidence":"Medium","gaps":["Did not distinguish contribution of full-length versus V2 isoform","Causal regulatory variants in patients not pinpointed"]},{"year":null,"claim":"How the truncated DENND1A.V2 isoform—lacking canonical trafficking function—mechanistically activates steroidogenic gene transcription remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No defined transcriptional or signaling effector linking V2 to CYP17A1/CYP11A1 promoters","No structural model of the V2 unique C-terminus","Relationship between V2's androgenic activity and full-length GEF function unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[5,2]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[2]}],"localization":[{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[5,9]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[5,9]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[4,7]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[0,10]}],"complexes":[],"partners":["RAB35","GRB2","EGFR"],"other_free_text":[]}},"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":171,"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":141,"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":46,"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":22,"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":"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 sciences","url":"https://pubmed.ncbi.nlm.nih.gov/32268539","citation_count":19,"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 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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":"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":6,"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":"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}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":18602,"output_tokens":3200,"usd":0.051903,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":10539,"output_tokens":3510,"usd":0.070222,"stage2_stop_reason":"end_turn"},"total_usd":0.122125,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","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 elevated in PCOS theca cells and drives augmented CYP17A1 and CYP11A1 gene transcription and androgen biosynthesis. Forced overexpression of DENND1A.V2 in normal theca cells conferred a PCOS phenotype of increased androgen production; knockdown in PCOS theca cells reduced androgen biosynthesis and CYP17A1/CYP11A1 mRNA.\",\n      \"method\": \"Overexpression and siRNA knockdown in primary human theca cells with mRNA/protein quantification and androgen biosynthesis assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal gain- and loss-of-function experiments in primary human cells with defined molecular and biochemical readouts, replicated across studies\",\n      \"pmids\": [\"24706793\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"DENND1A variant 2 (DENND1A.V2) is generated by alternative splicing via exonization of intronic sequences (intron 20), producing a unique exon 20A that encodes the unique C-terminus of the 559-amino-acid isoform. Forced expression of V2 in adrenal NCI-H295A cells increased CYP17A1 and CYP11A1 mRNAs, consistent with its role in androgen biosynthesis.\",\n      \"method\": \"Minigene expression vectors, sequencing, RT-PCR in NCI-H295A cells, overexpression assay\",\n      \"journal\": \"Molecular and cellular endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — splicing mechanism defined by minigene assay and sequencing; functional consequence confirmed by overexpression in adrenal cell line, single lab\",\n      \"pmids\": [\"27297658\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"DENND1A interacts with the N-terminal and C-terminal SH3 domains of the adaptor protein Grb2 through its proline-rich domain (PRD). Upon EGF stimulation, EGFR recruits the Grb2-DENND1A complex, leading to Rab35 activation and promotion of gastric cancer cell migration and invasion.\",\n      \"method\": \"GST-pulldown, co-immunoprecipitation, Rab35 activation assay (GST-pulldown), siRNA knockdown with wound healing and transwell migration assays\",\n      \"journal\": \"Frontiers in pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal binding confirmed by GST-pulldown and Co-IP; functional consequence shown by loss-of-function migration assay; single lab\",\n      \"pmids\": [\"30524285\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"miR-130b-3p targets DENND1A.V2 transcripts post-transcriptionally. miR-130b-3p expression is decreased in PCOS theca cells, correlating with increased DENND1A.V2 and CYP17A1 mRNA. miR-130b-3p mimic transfection reduced DENND1A.V2 and CYP17A1 expression and androgen biosynthesis.\",\n      \"method\": \"Small RNA deep sequencing (miR-seq), miR-130b-3p mimic transfection in theca cells, RT-qPCR for DENND1A.V2 and CYP17A1\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mimic overexpression with defined mRNA target and functional readout; single lab, two orthogonal methods (sequencing + functional mimic assay)\",\n      \"pmids\": [\"31184707\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Homozygous Dennd1a knockout mice die around embryonic day 14.5, exhibiting defects in brain development (dysregulated cell division and survival in telencephalon with ectopic Fgf8 expression and decreased active β-catenin/Axin2), impaired hepatic cell proliferation and differentiation, and loss of primordial germ cells. These phenotypes implicate DENND1A in endocytic recycling of cargos essential for developmental signaling.\",\n      \"method\": \"Dennd1a knockout mouse model, embryonic lethality assessment, immunostaining, mRNA expression analysis, histology\",\n      \"journal\": \"Developmental dynamics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean knockout with defined embryonic phenotypes and pathway markers; single lab\",\n      \"pmids\": [\"30884041\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"DENND1A (via its DENN domain GEF activity toward Rab35) is required for proper apical trafficking of podocalyxin (PODXL) in three-dimensional MDCK epithelial cysts but not in two-dimensional cultures. DENND1A-knockout cysts showed inverted (basolateral) PODXL localization similar to Rab35-knockout cysts; FLCN rather than DENND1A was required for Rab35-dependent PODXL trafficking in 2D cultures. The DENN domain GEF activity was required for this function.\",\n      \"method\": \"DENND1A knockout MDCK cells in 3D and 2D culture, immunofluorescence localization of PODXL, DENN domain mutant rescue experiments\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — knockout combined with domain mutant rescue and orthogonal culture-condition comparison; establishes GEF activity requirement with structural domain validation\",\n      \"pmids\": [\"31992598\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Human DENND1A.V2 transgenic mice (CMV promoter) showed elevated Cyp17a1 mRNA in ovaries and adrenals, and increased steroid production from isolated theca interstitial cells, consistent with a role of DENND1A.V2 in upregulating androgen biosynthetic enzymes in vivo. Murine Dennd1a knockout is embryonically lethal, and there is no endogenous mouse equivalent of the V2 isoform.\",\n      \"method\": \"Transgenic mouse overexpression (CMV, Lhcgr, TetOn promoters), immunohistochemistry, RT-qPCR, theca interstitial cell steroid production assay\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo transgenic with defined mRNA and steroid readouts; protein detection was weak (IHC only); single lab\",\n      \"pmids\": [\"32268539\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In the fetal mouse ovary, Dennd1a in somatic cells regulates oogenesis and meiosis by controlling production of Wnt5a (required for Sohlh2 expression and early oocyte differentiation) and retinoic acid (required for meiotic initiation via Stra8 and Rec8 expression). Ex vivo adenoviral shRNA knockdown of Dennd1a in E12.5 female gonads blocked activation of Sohlh2, Figla, Stra8, and Rec8 transcription.\",\n      \"method\": \"Dennd1a knockout mice, ex vivo fetal gonad culture with adenoviral shRNA knockdown, RT-qPCR for oogenesis/meiosis markers\",\n      \"journal\": \"Frontiers in bioscience (Landmark edition)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ex vivo knockdown with defined pathway markers; single lab, two orthogonal approaches (KO mice + shRNA in organ culture)\",\n      \"pmids\": [\"34994166\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ZNF217, a PCOS GWAS candidate gene and transcription factor, inversely regulates DENND1A.V2 expression in theca cells. ZNF217 overexpression in PCOS theca cells reduced DENND1A.V2 mRNA, CYP17A1 mRNA, and androgen production while increasing miR-130b-3p; ZNF217 knockdown in normal theca cells increased DENND1A.V2 and CYP17A1 mRNA. The effect is proposed to be mediated by miR-130b-3p targeting DENND1A.V2.\",\n      \"method\": \"ZNF217 overexpression and shRNA lentiviral knockdown in primary human theca cells, RT-qPCR, Western blot, androgen biosynthesis assay\",\n      \"journal\": \"Journal of the Endocrine Society\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal gain/loss-of-function in primary cells with defined molecular readouts; single lab\",\n      \"pmids\": [\"35668995\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"DENND1A overexpression in granulosa cells disrupts intracellular trafficking of follicle-stimulating hormone receptor (FSHR) by promoting its internalization and inhibiting recycling back to the cell surface, thereby desensitizing granulosa cells to FSH. Transgenic mice overexpressing Dennd1a showed subfertility, irregular estrous cycles, smaller ovaries, poorly developed follicles, increased testosterone after PMSG stimulation, and diminished FSH-priming gene expression.\",\n      \"method\": \"Dennd1a transgenic mouse model, FSHR trafficking assay (internalization/recycling), ovarian histology, hormone measurements, FSH-priming gene expression\",\n      \"journal\": \"Science China. Life sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo transgenic with defined trafficking mechanism (receptor internalization/recycling) and multiple phenotypic readouts; single lab\",\n      \"pmids\": [\"38709439\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Increasing endogenous DENND1A expression by perturbing candidate regulatory elements (identified via high-throughput reporter assays and CRISPR-based epigenome editing) causes elevated testosterone levels in an adrenal cell model, establishing a causal link between DENND1A expression level and androgen biosynthesis.\",\n      \"method\": \"High-throughput reporter assays (MPRA), CRISPR-based epigenome editing of regulatory elements, testosterone measurement in adrenal cell model\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — CRISPR epigenome editing with defined hormonal readout; single study with orthogonal regulatory and functional assays\",\n      \"pmids\": [\"40825976\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"DENND1A encodes a Rab35 guanine nucleotide exchange factor (GEF) that regulates endocytic recycling of membrane receptors (including FSHR and podocalyxin) via its DENN domain; a truncated splice isoform (DENND1A.V2, generated by exonization of intron 20) is upregulated in PCOS theca cells downstream of reduced miR-130b-3p and ZNF217, driving transcription of CYP17A1 and CYP11A1 to increase androgen biosynthesis, while full-length DENND1A is required for embryogenesis (Wnt/β-catenin and retinoic acid signaling), oogenesis/meiosis initiation in the fetal ovary, and FSH receptor recycling in granulosa cells.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"DENND1A is a Rab35 guanine nucleotide exchange factor whose DENN domain GEF activity drives endocytic recycling of specific membrane cargos required for epithelial polarity and developmental signaling [#5]. Its DENN domain activates Rab35 to direct apical trafficking of podocalyxin in three-dimensional epithelial cysts, a function abolished by GEF-dead domain mutants [#5], and the same GEF axis is engaged downstream of EGFR via a Grb2 interaction—mediated by the DENND1A proline-rich domain binding the Grb2 SH3 domains—to promote cell migration and invasion [#2]. In the female reproductive system, full-length DENND1A is required for embryogenesis, with knockout causing embryonic lethality, defective Wnt/\\u03b2-catenin-dependent brain and hepatic development, and loss of primordial germ cells [#4], and for somatic-cell control of fetal oogenesis and meiotic initiation through Wnt5a- and retinoic acid-dependent activation of Sohlh2, Stra8, and Rec8 [#7]; in granulosa cells DENND1A overexpression desensitizes cells to FSH by accelerating FSH receptor internalization and blocking its recycling [#9]. A truncated splice isoform, DENND1A.V2—generated by exonization of intron 20 to create a unique C-terminus [#1]—is elevated in PCOS theca cells, where it drives transcription of the androgen biosynthetic enzymes CYP17A1 and CYP11A1 and increases androgen production [#0]; this isoform is held in check by miR-130b-3p, itself controlled by the transcription factor ZNF217, so that loss of this regulatory axis raises DENND1A.V2 and androgen output [#3, #8]. Manipulation of endogenous DENND1A regulatory elements causally elevates testosterone in adrenal cells, confirming DENND1A expression level as a determinant of androgen biosynthesis [#10].\",\n  \"teleology\": [\n    {\n      \"year\": 2014,\n      \"claim\": \"Established that a DENND1A isoform, rather than the gene generically, is the functional driver of the PCOS theca-cell androgen excess phenotype.\",\n      \"evidence\": \"Reciprocal overexpression and siRNA knockdown of DENND1A.V2 in primary human theca cells with androgen biosynthesis and CYP17A1/CYP11A1 readouts\",\n      \"pmids\": [\"24706793\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define how V2 is generated at the transcript level\", \"Mechanism linking V2 to steroidogenic gene transcription not resolved\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Defined the molecular origin of the disease-associated isoform, showing V2 arises by exonization of intron 20 to encode a unique truncated C-terminus.\",\n      \"evidence\": \"Minigene expression vectors, sequencing, and RT-PCR with overexpression in NCI-H295A adrenal cells\",\n      \"pmids\": [\"27297658\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab\", \"How the unique C-terminus mechanistically alters function versus full-length protein unknown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Connected DENND1A to receptor tyrosine kinase signaling, showing it is recruited via Grb2 to activate Rab35 and promote tumor cell motility.\",\n      \"evidence\": \"GST-pulldown and Co-IP mapping the PRD\\u2013Grb2 SH3 interaction, Rab35 activation assay, and knockdown migration/invasion assays in gastric cancer cells\",\n      \"pmids\": [\"30524285\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab\", \"Cargo recycled downstream of Rab35 in this context not identified\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrated full-length DENND1A is essential for embryogenesis and links its function to developmental signaling pathways.\",\n      \"evidence\": \"Homozygous Dennd1a knockout mouse with embryonic lethality, histology, and Wnt/\\u03b2-catenin and Fgf8 pathway marker analysis\",\n      \"pmids\": [\"30884041\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Specific recycled cargos underlying each developmental defect not identified\", \"Single lab\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Identified an upstream post-transcriptional brake on the androgenic isoform, explaining why V2 is elevated in PCOS.\",\n      \"evidence\": \"miR-seq and miR-130b-3p mimic transfection in theca cells with DENND1A.V2/CYP17A1 and androgen readouts\",\n      \"pmids\": [\"31184707\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct target-site binding not validated by reporter assay\", \"Single lab\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Provided definitive mechanistic proof that DENND1A acts through DENN-domain GEF activity on Rab35 for cargo-specific apical trafficking.\",\n      \"evidence\": \"DENND1A-knockout MDCK 3D/2D cysts, PODXL localization imaging, and GEF-dead domain mutant rescue\",\n      \"pmids\": [\"31992598\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Context-specificity (3D vs 2D, FLCN vs DENND1A) mechanism incompletely defined\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Tested the androgenic isoform in vivo, showing transgenic V2 raises steroidogenic enzyme expression and steroid output.\",\n      \"evidence\": \"Human DENND1A.V2 transgenic mice with ovary/adrenal Cyp17a1 mRNA and theca interstitial cell steroid assays\",\n      \"pmids\": [\"32268539\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Weak protein-level detection (IHC only)\", \"No endogenous mouse V2 equivalent, limiting physiological modeling\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Established a somatic-cell role for DENND1A in fetal ovary development controlling oogenesis and meiotic initiation.\",\n      \"evidence\": \"Dennd1a knockout mice plus ex vivo adenoviral shRNA knockdown in E12.5 gonads with Sohlh2/Figla/Stra8/Rec8 marker analysis\",\n      \"pmids\": [\"34994166\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How DENND1A trafficking controls Wnt5a and retinoic acid production not mechanistically resolved\", \"Single lab\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Placed a GWAS-implicated transcription factor upstream of the V2/miR-130b-3p axis, building a regulatory hierarchy for androgen excess.\",\n      \"evidence\": \"ZNF217 overexpression and lentiviral knockdown in primary human theca cells with DENND1A.V2, CYP17A1, miR-130b-3p, and androgen readouts\",\n      \"pmids\": [\"35668995\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct ZNF217 regulation of miR-130b-3p versus DENND1A not distinguished mechanistically\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Identified a granulosa-cell mechanism whereby DENND1A dosage disrupts FSH responsiveness through receptor trafficking.\",\n      \"evidence\": \"Dennd1a transgenic mice with FSHR internalization/recycling assays, ovarian histology, hormone measurement, and FSH-priming gene expression\",\n      \"pmids\": [\"38709439\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether Rab35 GEF activity mediates the FSHR effect not tested\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Demonstrated a causal, dose-dependent link between endogenous DENND1A expression level and androgen biosynthesis via regulatory-element perturbation.\",\n      \"evidence\": \"MPRA and CRISPR-based epigenome editing of regulatory elements with testosterone measurement in an adrenal cell model\",\n      \"pmids\": [\"40825976\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Did not distinguish contribution of full-length versus V2 isoform\", \"Causal regulatory variants in patients not pinpointed\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the truncated DENND1A.V2 isoform—lacking canonical trafficking function—mechanistically activates steroidogenic gene transcription remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No defined transcriptional or signaling effector linking V2 to CYP17A1/CYP11A1 promoters\", \"No structural model of the V2 unique C-terminus\", \"Relationship between V2's androgenic activity and full-length GEF function unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [5, 2]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [2]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [5, 9]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [5, 9]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [4, 7]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [0, 10]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"RAB35\", \"GRB2\", \"EGFR\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}