{"gene":"GATAD1","run_date":"2026-06-10T01:55:21","timeline":{"discoveries":[{"year":2011,"finding":"GATAD1 localizes to the nucleus of left ventricular myocytes, as demonstrated by immunohistochemistry; a homozygous missense mutation (S102P) causes aberrant subcellular expression and abnormal nuclear morphology in cardiomyocytes, implicating GATAD1 in epigenetic regulation via its known interaction with the H3K4me3 histone modification site.","method":"Immunohistochemistry on human cardiac tissue; homozygosity mapping and exome sequencing","journal":"Circulation. Cardiovascular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct localization experiment with functional consequence (aberrant nuclear morphology), single lab, single primary method for the mechanistic claim","pmids":["21965549"],"is_preprint":false},{"year":2008,"finding":"ODAG (GATAD1) physically binds Rab6-GTPase-activating protein (Rab6-GAP) and its substrate Rab6, as identified by pull-down assay coupled with mass spectrometry; overexpression of ODAG in transgenic mice causes elevated intraocular pressure, optic nerve atrophy, and impaired retinal development, suggesting interference with Rab6/Rab6-GAP-mediated signaling.","method":"Pull-down assay with mass spectrometry (binding partners); transgenic mouse overexpression (functional phenotype)","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal pull-down with MS identification of binding partners plus in vivo loss-of-function phenotype, single lab","pmids":["18791169"],"is_preprint":false},{"year":2016,"finding":"Zebrafish Gatad1 protein localizes to both the nucleus and the sarcomeric I-band in cardiomyocytes, as shown by fluorescently-tagged Gatad1 injection; gatad1 knockout zebrafish develop heart failure-like phenotypes under stress conditions, validating its functional role in cardiac maintenance.","method":"Fluorescent protein tagging and live imaging (subcellular localization); TALEN-mediated knockout with longitudinal cardiac phenotyping","journal":"Journal of cardiovascular development and disease","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct localization experiment with KO phenotype, single lab, single study","pmids":["28955713"],"is_preprint":false},{"year":2019,"finding":"GATAD1 promotes CCND1 (cyclin D1) gene transcription by inducing long-range chromatin architectural interactions at the CCND1 promoter, as demonstrated by ChIP-qPCR, EMSA, and chromosome conformation capture (3C); GATAD1 knockdown suppresses GBM cell proliferation in vitro and in vivo by reducing CCND1-driven cell cycle progression.","method":"ChIP-qPCR, EMSA, 3C chromatin conformation capture, cDNA microarray, siRNA knockdown, orthotopic tumor transplantation","journal":"Cancer medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (ChIP, EMSA, 3C, KD with rescue) in a single study establishing mechanism","pmids":["31286678"],"is_preprint":false},{"year":2023,"finding":"GATAD1 promotes cell proliferation in ER+ breast cancer cells by transcriptionally inhibiting p21; GATAD1 depletion decreases phosphorylation of CDK2/4 and RB1, inducing cell cycle arrest, and p21 overexpression abolishes the enhanced proliferation induced by GATAD1 overexpression.","method":"CRISPR synthetic lethality screen; siRNA knockdown; overexpression; Western blot for CDK2/4 and RB1 phosphorylation; p21 rescue experiment","journal":"Medical oncology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis (p21 rescue) plus phosphorylation readout, single lab, multiple complementary methods","pmids":["37567972"],"is_preprint":false},{"year":2022,"finding":"GATAD1 transcriptionally activates SRRM2 expression in thyroid carcinoma cells; GATAD1 knockdown decreases SRRM2 levels, GATAD1 overexpression increases SRRM2 levels, and SRRM2 knockdown abolishes GATAD1-induced cell proliferation, placing GATAD1 upstream of SRRM2 in a proliferative axis.","method":"siRNA knockdown, overexpression, cell proliferation assay, cell cycle analysis, epistasis rescue experiment","journal":"Gland surgery","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — genetic epistasis with rescue experiment, single lab, single study","pmids":["36654960"],"is_preprint":false},{"year":2024,"finding":"GATAD1 acts as a transcription factor regulating cardiac metabolic gene expression: it inhibits expression of fatty acid oxidation genes (Acaa2, Acadm) and promotes expression of the glucose oxidation gene Pdha1; cardiomyocyte-specific Gatad1 knockout increases myocardial infarct size and impairs cardiac function after ischemia-reperfusion, and SPC cardioprotection is abolished in Gatad1 CKO mice.","method":"Cardiomyocyte-specific knockout mouse model; dual fluorescence reporter assay; qPCR; Western blot (nuclear-cytoplasmic fractionation); immunofluorescence; siRNA/overexpression of downstream targets","journal":"Free radical biology & medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional KO with defined metabolic and functional phenotype, dual reporter assay establishing transcriptional regulation of specific metabolic genes, multiple orthogonal methods, single lab","pmids":["39626862"],"is_preprint":false},{"year":2024,"finding":"Cardiomyocyte-specific deletion of Gatad1 in mice does NOT cause cardiomyopathy during aging (up to 18 months) or under pressure overload (TAC), and does not alter cardiomyocyte nuclear morphology, indicating that cardiomyocyte-autonomous loss of Gatad1 alone is insufficient to recapitulate the human DCM phenotype in mice.","method":"Cardiomyocyte-specific conditional knockout mouse model; echocardiography; histology; TAC stress model","journal":"Journal of molecular histology","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — clean cKO with longitudinal functional assessment, single lab; finding is a negative/null result","pmids":["39641830"],"is_preprint":false},{"year":2025,"finding":"Endothelial GATAD1 regulates CD36 expression and thereby controls caveolae-mediated transcytosis in cerebral endothelial cells; EC-specific Gatad1 deficiency reduces blood-brain barrier permeability, decreases infarct volume, and improves neurological outcomes after experimental ischemic stroke.","method":"Endothelial cell-specific conditional knockout mouse model; experimental stroke model; BBB permeability assays; mechanistic investigation of CD36 expression and caveolae-mediated transcytosis","journal":"Neuroscience bulletin","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — EC-specific KO with defined transcriptional target (CD36) and cellular mechanism (transcytosis), single lab, single study","pmids":["40965809"],"is_preprint":false},{"year":2014,"finding":"GATAD1 expression in trophoblasts is positively correlated with DNA methylation in the 3′ region of the GATAD1 gene; treatment of choriocarcinoma JAR cells with a DNMT inhibitor reduces GATAD1 expression, indicating that 3′ DNA methylation positively regulates GATAD1 transcription.","method":"COBRA, bisulfite sequencing, DNMT inhibitor treatment of JAR cells, qRT-PCR, Western blot","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct pharmacological manipulation establishing methylation-expression relationship, single lab, single study","pmids":["24462704"],"is_preprint":false}],"current_model":"GATAD1 is a nuclear zinc finger transcription factor that interacts with the H3K4me3 histone modification site and functions as a chromatin topological/epigenetic regulator: it promotes transcription of CCND1 (via long-range chromatin looping), SRRM2, and glucose oxidation genes (Pdha1) while repressing fatty acid oxidation genes (Acaa2, Acadm) and p21, thereby controlling cell cycle progression and metabolic homeostasis in cardiomyocytes, cancer cells, and endothelial cells; its physical binding partners include Rab6-GAP and Rab6, and its transcriptional activity in endothelial cells governs CD36-dependent caveolae-mediated transcytosis and blood-brain barrier integrity."},"narrative":{"mechanistic_narrative":"GATAD1 is a nuclear zinc finger protein that functions as a chromatin-associated transcriptional regulator controlling cell-cycle progression and metabolic gene expression across cardiomyocytes, cancer cells, and endothelial cells [PMID:31286678, PMID:39626862]. As a transcriptional activator it drives proliferation: in glioblastoma it promotes CCND1 (cyclin D1) transcription by inducing long-range chromatin architectural interactions at the CCND1 promoter [PMID:31286678], in thyroid carcinoma it activates SRRM2 to sustain proliferation [PMID:36654960], and in ER+ breast cancer it represses p21 to maintain CDK2/4- and RB1-phosphorylation-dependent cell-cycle entry [PMID:37567972]. In the heart, GATAD1 acts as a metabolic gene regulator, repressing fatty acid oxidation genes (Acaa2, Acadm) while promoting the glucose oxidation gene Pdha1, and is required for cardioprotection after ischemia-reperfusion injury [PMID:39626862]. In cerebral endothelial cells GATAD1 controls CD36 expression and thereby caveolae-mediated transcytosis governing blood-brain barrier permeability after ischemic stroke [PMID:40965809]. A homozygous S102P mutation causes aberrant nuclear localization and abnormal nuclear morphology in cardiomyocytes, linking GATAD1 to human dilated cardiomyopathy [PMID:21965549], though cardiomyocyte-autonomous loss alone does not recapitulate this phenotype in mice [PMID:39641830]. GATAD1 also physically associates with Rab6 and Rab6-GAP [PMID:18791169], and its own expression is positively regulated by 3' DNA methylation [PMID:24462704].","teleology":[{"year":2008,"claim":"Established the first physical interactions of GATAD1 (ODAG), identifying Rab6 and Rab6-GAP as binding partners and connecting it to an in vivo ocular developmental phenotype.","evidence":"Pull-down with mass spectrometry plus transgenic mouse overexpression","pmids":["18791169"],"confidence":"Medium","gaps":["Does not establish whether the Rab6 interaction is nuclear or cytoplasmic","No link between Rab6 binding and the later transcriptional functions","Overexpression phenotype may not reflect endogenous role"]},{"year":2011,"claim":"Placed GATAD1 in the nucleus of cardiomyocytes and linked a human DCM-causing mutation (S102P) to disrupted nuclear localization and morphology, framing it as an epigenetic/chromatin regulator.","evidence":"Immunohistochemistry on human cardiac tissue with homozygosity mapping and exome sequencing","pmids":["21965549"],"confidence":"Medium","gaps":["Single primary method for the mechanistic claim","Does not define molecular target genes","H3K4me3 interaction is invoked but not demonstrated here"]},{"year":2014,"claim":"Identified an upstream regulatory input on GATAD1 itself, showing its transcription is positively controlled by 3' DNA methylation.","evidence":"COBRA, bisulfite sequencing, and DNMT inhibitor treatment of JAR cells with expression readout","pmids":["24462704"],"confidence":"Medium","gaps":["Mechanism by which 3' methylation enhances expression unknown","Limited to choriocarcinoma cells","No functional consequence for trophoblast biology established"]},{"year":2016,"claim":"Confirmed GATAD1's functional requirement in cardiac maintenance in vivo and revealed dual nuclear and sarcomeric I-band localization.","evidence":"Fluorescent tagging/live imaging and TALEN knockout with cardiac phenotyping in zebrafish","pmids":["28955713"],"confidence":"Medium","gaps":["Functional role of sarcomeric localization undefined","No molecular target genes identified","Single model organism"]},{"year":2019,"claim":"Defined a concrete molecular mechanism: GATAD1 promotes CCND1 transcription via long-range chromatin looping, establishing it as a chromatin architectural regulator driving cell-cycle progression in cancer.","evidence":"ChIP-qPCR, EMSA, 3C, microarray, siRNA knockdown, and orthotopic tumor transplantation in GBM","pmids":["31286678"],"confidence":"High","gaps":["Direct DNA-binding sequence specificity not fully resolved","Whether looping is direct or via cofactors unknown","Generalizability of the looping mechanism to other target genes untested"]},{"year":2022,"claim":"Extended GATAD1's pro-proliferative role to thyroid carcinoma by placing it transcriptionally upstream of SRRM2.","evidence":"siRNA knockdown, overexpression, and SRRM2 epistasis rescue in thyroid carcinoma cells","pmids":["36654960"],"confidence":"Medium","gaps":["Whether GATAD1 binds the SRRM2 locus directly not shown","No chromatin-level mechanism demonstrated","Single cell-type study"]},{"year":2023,"claim":"Showed GATAD1 sustains ER+ breast cancer proliferation by repressing p21, linking its activity to CDK2/4 and RB1 phosphorylation in cell-cycle control.","evidence":"CRISPR synthetic lethality screen, knockdown/overexpression, phospho-Western blot, and p21 rescue","pmids":["37567972"],"confidence":"Medium","gaps":["Direct vs indirect repression of p21 not resolved","DNA-binding site at p21 locus not mapped","Single cancer context"]},{"year":2024,"claim":"Established GATAD1 as a cardiac metabolic gene regulator (repressing FAO genes, promoting Pdha1) required for ischemia-reperfusion cardioprotection, while a parallel study showed cardiomyocyte-autonomous loss is insufficient to cause cardiomyopathy.","evidence":"Cardiomyocyte-specific knockout mice with metabolic/functional phenotyping, dual reporter assays, and TAC/aging stress models","pmids":["39626862","39641830"],"confidence":"High","gaps":["Reconciliation of the metabolic phenotype with the absence of baseline cardiomyopathy unresolved","Whether human DCM requires non-cardiomyocyte contributions unknown","Direct binding at metabolic gene promoters not mapped"]},{"year":2025,"claim":"Revealed a cell-type-specific endothelial function: GATAD1 controls CD36 expression and caveolae-mediated transcytosis to regulate blood-brain barrier permeability after ischemic stroke.","evidence":"Endothelial-specific conditional knockout mice with experimental stroke, BBB permeability assays, and CD36/transcytosis analysis","pmids":["40965809"],"confidence":"Medium","gaps":["Whether GATAD1 binds the CD36 locus directly not shown","Mechanism linking transcription to caveolae formation incomplete","Single laboratory/model"]},{"year":null,"claim":"How GATAD1 selects target genes and whether its reported H3K4me3 interaction, chromatin looping, and Rab6 binding represent a single unified molecular mechanism across tissues remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model or defined DNA-binding consensus","Cofactors mediating chromatin looping unidentified","Relationship between the Rab6 interaction and nuclear transcriptional roles unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[3,4,5,6,8]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[3]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,2,6]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[3,5,6,8]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[3,4]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[6]}],"complexes":[],"partners":["RAB6","RAB6-GAP"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q8WUU5","full_name":"GATA zinc finger domain-containing protein 1","aliases":["Ocular development-associated gene protein"],"length_aa":269,"mass_kda":28.7,"function":"Component of some chromatin complex recruited to chromatin sites methylated 'Lys-4' of histone H3 (H3K4me), with a preference for trimethylated form (H3K4me3)","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q8WUU5/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/GATAD1","classification":"Not Classified","n_dependent_lines":90,"n_total_lines":1208,"dependency_fraction":0.07450331125827815},"opencell":{"profiled":true,"resolved_as":"","ensg_id":"ENSG00000157259","cell_line_id":"CID001603","localizations":[{"compartment":"nucleoplasm","grade":3},{"compartment":"chromatin","grade":2}],"interactors":[{"gene":"SRPR","stoichiometry":10.0},{"gene":"PHF12","stoichiometry":4.0},{"gene":"EMSY;C11ORF30","stoichiometry":4.0},{"gene":"ARL8A","stoichiometry":0.2},{"gene":"ARL8B","stoichiometry":0.2},{"gene":"KDM5A","stoichiometry":0.2},{"gene":"HIST2H2BE","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/target/CID001603","total_profiled":1310},"omim":[{"mim_id":"614672","title":"CARDIOMYOPATHY, DILATED, 2B; CMD2B","url":"https://www.omim.org/entry/614672"},{"mim_id":"614518","title":"GATA ZINC FINGER DOMAIN-CONTAINING PROTEIN 1; GATAD1","url":"https://www.omim.org/entry/614518"},{"mim_id":"115200","title":"CARDIOMYOPATHY, DILATED, 1A; CMD1A","url":"https://www.omim.org/entry/115200"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Enhanced","locations":[{"location":"Nucleoplasm","reliability":"Enhanced"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/GATAD1"},"hgnc":{"alias_symbol":["ODAG","RG083M05.2","FLJ22489"],"prev_symbol":[]},"alphafold":{"accession":"Q8WUU5","domains":[{"cath_id":"2.30.30.490","chopping":"138-224","consensus_level":"high","plddt":93.2425,"start":138,"end":224},{"cath_id":"3.30.60","chopping":"2-36","consensus_level":"medium","plddt":83.4629,"start":2,"end":36}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8WUU5","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q8WUU5-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q8WUU5-F1-predicted_aligned_error_v6.png","plddt_mean":70.56},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=GATAD1","jax_strain_url":"https://www.jax.org/strain/search?query=GATAD1"},"sequence":{"accession":"Q8WUU5","fasta_url":"https://rest.uniprot.org/uniprotkb/Q8WUU5.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q8WUU5/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8WUU5"}},"corpus_meta":[{"pmid":"21965549","id":"PMC_21965549","title":"Homozygosity mapping and exome sequencing reveal GATAD1 mutation in autosomal recessive dilated cardiomyopathy.","date":"2011","source":"Circulation. Cardiovascular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/21965549","citation_count":57,"is_preprint":false},{"pmid":"24462704","id":"PMC_24462704","title":"Decreased expression and DNA methylation levels of GATAD1 in preeclamptic placentas.","date":"2014","source":"Cellular signalling","url":"https://pubmed.ncbi.nlm.nih.gov/24462704","citation_count":13,"is_preprint":false},{"pmid":"28955713","id":"PMC_28955713","title":"Modeling GATAD1-Associated Dilated Cardiomyopathy in Adult Zebrafish.","date":"2016","source":"Journal of cardiovascular development and disease","url":"https://pubmed.ncbi.nlm.nih.gov/28955713","citation_count":13,"is_preprint":false},{"pmid":"12062807","id":"PMC_12062807","title":"Ocular development-associated gene (ODAG), a novel gene highly expressed in ocular development.","date":"2002","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/12062807","citation_count":9,"is_preprint":false},{"pmid":"31286678","id":"PMC_31286678","title":"GATAD1 gene amplification promotes glioma malignancy by directly regulating CCND1 transcription.","date":"2019","source":"Cancer medicine","url":"https://pubmed.ncbi.nlm.nih.gov/31286678","citation_count":8,"is_preprint":false},{"pmid":"39626862","id":"PMC_39626862","title":"GATAD1 is involved in sphingosylphosphorylcholine-attenuated myocardial ischemia-reperfusion injury by modulating myocardial fatty acid oxidation and glucose oxidation.","date":"2024","source":"Free radical biology & medicine","url":"https://pubmed.ncbi.nlm.nih.gov/39626862","citation_count":8,"is_preprint":false},{"pmid":"38443846","id":"PMC_38443846","title":"Knockdown of circ-Gatad1 alleviates LPS induced HK2 cell injury via targeting miR-22-3p/TRPM7 axis in septic acute kidney.","date":"2024","source":"BMC nephrology","url":"https://pubmed.ncbi.nlm.nih.gov/38443846","citation_count":6,"is_preprint":false},{"pmid":"18791169","id":"PMC_18791169","title":"Elevated intraocular pressure, optic nerve atrophy, and impaired retinal development in ODAG transgenic mice.","date":"2008","source":"Investigative ophthalmology & visual science","url":"https://pubmed.ncbi.nlm.nih.gov/18791169","citation_count":5,"is_preprint":false},{"pmid":"37567972","id":"PMC_37567972","title":"CRISPR screen identifies GATAD1 as a synthetic lethal target with CDK4/6 inhibitors in estrogen receptor-positive breast cancer.","date":"2023","source":"Medical oncology (Northwood, London, England)","url":"https://pubmed.ncbi.nlm.nih.gov/37567972","citation_count":2,"is_preprint":false},{"pmid":"36654960","id":"PMC_36654960","title":"Effect of GATAD1 regulating the SRRM2 gene on recurrence of thyroid tumor and its molecular mechanism.","date":"2022","source":"Gland surgery","url":"https://pubmed.ncbi.nlm.nih.gov/36654960","citation_count":1,"is_preprint":false},{"pmid":"39641830","id":"PMC_39641830","title":"Loss of GATAD1 in cardiomyocyte does not cause cardiomyopathy in mice.","date":"2024","source":"Journal of molecular histology","url":"https://pubmed.ncbi.nlm.nih.gov/39641830","citation_count":1,"is_preprint":false},{"pmid":"40965809","id":"PMC_40965809","title":"Endothelial GATAD1 Exacerbates Blood-brain Barrier Dysfunction in Ischemic Stroke through Caveolae-mediated Transcytosis.","date":"2025","source":"Neuroscience bulletin","url":"https://pubmed.ncbi.nlm.nih.gov/40965809","citation_count":1,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":8179,"output_tokens":2568,"usd":0.031529,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":9845,"output_tokens":3358,"usd":0.066587,"stage2_stop_reason":"end_turn"},"total_usd":0.098116,"stage1_batch_id":"msgbatch_01DUPACZi7AAWwuZiUjseQF4","stage2_batch_id":"msgbatch_018yt7chE3f48PEFtDwtj6AE","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2011,\n      \"finding\": \"GATAD1 localizes to the nucleus of left ventricular myocytes, as demonstrated by immunohistochemistry; a homozygous missense mutation (S102P) causes aberrant subcellular expression and abnormal nuclear morphology in cardiomyocytes, implicating GATAD1 in epigenetic regulation via its known interaction with the H3K4me3 histone modification site.\",\n      \"method\": \"Immunohistochemistry on human cardiac tissue; homozygosity mapping and exome sequencing\",\n      \"journal\": \"Circulation. Cardiovascular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct localization experiment with functional consequence (aberrant nuclear morphology), single lab, single primary method for the mechanistic claim\",\n      \"pmids\": [\"21965549\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"ODAG (GATAD1) physically binds Rab6-GTPase-activating protein (Rab6-GAP) and its substrate Rab6, as identified by pull-down assay coupled with mass spectrometry; overexpression of ODAG in transgenic mice causes elevated intraocular pressure, optic nerve atrophy, and impaired retinal development, suggesting interference with Rab6/Rab6-GAP-mediated signaling.\",\n      \"method\": \"Pull-down assay with mass spectrometry (binding partners); transgenic mouse overexpression (functional phenotype)\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal pull-down with MS identification of binding partners plus in vivo loss-of-function phenotype, single lab\",\n      \"pmids\": [\"18791169\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Zebrafish Gatad1 protein localizes to both the nucleus and the sarcomeric I-band in cardiomyocytes, as shown by fluorescently-tagged Gatad1 injection; gatad1 knockout zebrafish develop heart failure-like phenotypes under stress conditions, validating its functional role in cardiac maintenance.\",\n      \"method\": \"Fluorescent protein tagging and live imaging (subcellular localization); TALEN-mediated knockout with longitudinal cardiac phenotyping\",\n      \"journal\": \"Journal of cardiovascular development and disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct localization experiment with KO phenotype, single lab, single study\",\n      \"pmids\": [\"28955713\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"GATAD1 promotes CCND1 (cyclin D1) gene transcription by inducing long-range chromatin architectural interactions at the CCND1 promoter, as demonstrated by ChIP-qPCR, EMSA, and chromosome conformation capture (3C); GATAD1 knockdown suppresses GBM cell proliferation in vitro and in vivo by reducing CCND1-driven cell cycle progression.\",\n      \"method\": \"ChIP-qPCR, EMSA, 3C chromatin conformation capture, cDNA microarray, siRNA knockdown, orthotopic tumor transplantation\",\n      \"journal\": \"Cancer medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (ChIP, EMSA, 3C, KD with rescue) in a single study establishing mechanism\",\n      \"pmids\": [\"31286678\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"GATAD1 promotes cell proliferation in ER+ breast cancer cells by transcriptionally inhibiting p21; GATAD1 depletion decreases phosphorylation of CDK2/4 and RB1, inducing cell cycle arrest, and p21 overexpression abolishes the enhanced proliferation induced by GATAD1 overexpression.\",\n      \"method\": \"CRISPR synthetic lethality screen; siRNA knockdown; overexpression; Western blot for CDK2/4 and RB1 phosphorylation; p21 rescue experiment\",\n      \"journal\": \"Medical oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis (p21 rescue) plus phosphorylation readout, single lab, multiple complementary methods\",\n      \"pmids\": [\"37567972\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"GATAD1 transcriptionally activates SRRM2 expression in thyroid carcinoma cells; GATAD1 knockdown decreases SRRM2 levels, GATAD1 overexpression increases SRRM2 levels, and SRRM2 knockdown abolishes GATAD1-induced cell proliferation, placing GATAD1 upstream of SRRM2 in a proliferative axis.\",\n      \"method\": \"siRNA knockdown, overexpression, cell proliferation assay, cell cycle analysis, epistasis rescue experiment\",\n      \"journal\": \"Gland surgery\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — genetic epistasis with rescue experiment, single lab, single study\",\n      \"pmids\": [\"36654960\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"GATAD1 acts as a transcription factor regulating cardiac metabolic gene expression: it inhibits expression of fatty acid oxidation genes (Acaa2, Acadm) and promotes expression of the glucose oxidation gene Pdha1; cardiomyocyte-specific Gatad1 knockout increases myocardial infarct size and impairs cardiac function after ischemia-reperfusion, and SPC cardioprotection is abolished in Gatad1 CKO mice.\",\n      \"method\": \"Cardiomyocyte-specific knockout mouse model; dual fluorescence reporter assay; qPCR; Western blot (nuclear-cytoplasmic fractionation); immunofluorescence; siRNA/overexpression of downstream targets\",\n      \"journal\": \"Free radical biology & medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional KO with defined metabolic and functional phenotype, dual reporter assay establishing transcriptional regulation of specific metabolic genes, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"39626862\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Cardiomyocyte-specific deletion of Gatad1 in mice does NOT cause cardiomyopathy during aging (up to 18 months) or under pressure overload (TAC), and does not alter cardiomyocyte nuclear morphology, indicating that cardiomyocyte-autonomous loss of Gatad1 alone is insufficient to recapitulate the human DCM phenotype in mice.\",\n      \"method\": \"Cardiomyocyte-specific conditional knockout mouse model; echocardiography; histology; TAC stress model\",\n      \"journal\": \"Journal of molecular histology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — clean cKO with longitudinal functional assessment, single lab; finding is a negative/null result\",\n      \"pmids\": [\"39641830\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Endothelial GATAD1 regulates CD36 expression and thereby controls caveolae-mediated transcytosis in cerebral endothelial cells; EC-specific Gatad1 deficiency reduces blood-brain barrier permeability, decreases infarct volume, and improves neurological outcomes after experimental ischemic stroke.\",\n      \"method\": \"Endothelial cell-specific conditional knockout mouse model; experimental stroke model; BBB permeability assays; mechanistic investigation of CD36 expression and caveolae-mediated transcytosis\",\n      \"journal\": \"Neuroscience bulletin\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — EC-specific KO with defined transcriptional target (CD36) and cellular mechanism (transcytosis), single lab, single study\",\n      \"pmids\": [\"40965809\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"GATAD1 expression in trophoblasts is positively correlated with DNA methylation in the 3′ region of the GATAD1 gene; treatment of choriocarcinoma JAR cells with a DNMT inhibitor reduces GATAD1 expression, indicating that 3′ DNA methylation positively regulates GATAD1 transcription.\",\n      \"method\": \"COBRA, bisulfite sequencing, DNMT inhibitor treatment of JAR cells, qRT-PCR, Western blot\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct pharmacological manipulation establishing methylation-expression relationship, single lab, single study\",\n      \"pmids\": [\"24462704\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"GATAD1 is a nuclear zinc finger transcription factor that interacts with the H3K4me3 histone modification site and functions as a chromatin topological/epigenetic regulator: it promotes transcription of CCND1 (via long-range chromatin looping), SRRM2, and glucose oxidation genes (Pdha1) while repressing fatty acid oxidation genes (Acaa2, Acadm) and p21, thereby controlling cell cycle progression and metabolic homeostasis in cardiomyocytes, cancer cells, and endothelial cells; its physical binding partners include Rab6-GAP and Rab6, and its transcriptional activity in endothelial cells governs CD36-dependent caveolae-mediated transcytosis and blood-brain barrier integrity.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"GATAD1 is a nuclear zinc finger protein that functions as a chromatin-associated transcriptional regulator controlling cell-cycle progression and metabolic gene expression across cardiomyocytes, cancer cells, and endothelial cells [#3, #6]. As a transcriptional activator it drives proliferation: in glioblastoma it promotes CCND1 (cyclin D1) transcription by inducing long-range chromatin architectural interactions at the CCND1 promoter [#3], in thyroid carcinoma it activates SRRM2 to sustain proliferation [#5], and in ER+ breast cancer it represses p21 to maintain CDK2/4- and RB1-phosphorylation-dependent cell-cycle entry [#4]. In the heart, GATAD1 acts as a metabolic gene regulator, repressing fatty acid oxidation genes (Acaa2, Acadm) while promoting the glucose oxidation gene Pdha1, and is required for cardioprotection after ischemia-reperfusion injury [#6]. In cerebral endothelial cells GATAD1 controls CD36 expression and thereby caveolae-mediated transcytosis governing blood-brain barrier permeability after ischemic stroke [#8]. A homozygous S102P mutation causes aberrant nuclear localization and abnormal nuclear morphology in cardiomyocytes, linking GATAD1 to human dilated cardiomyopathy [#0], though cardiomyocyte-autonomous loss alone does not recapitulate this phenotype in mice [#7]. GATAD1 also physically associates with Rab6 and Rab6-GAP [#1], and its own expression is positively regulated by 3' DNA methylation [#9].\",\n  \"teleology\": [\n    {\n      \"year\": 2008,\n      \"claim\": \"Established the first physical interactions of GATAD1 (ODAG), identifying Rab6 and Rab6-GAP as binding partners and connecting it to an in vivo ocular developmental phenotype.\",\n      \"evidence\": \"Pull-down with mass spectrometry plus transgenic mouse overexpression\",\n      \"pmids\": [\"18791169\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Does not establish whether the Rab6 interaction is nuclear or cytoplasmic\", \"No link between Rab6 binding and the later transcriptional functions\", \"Overexpression phenotype may not reflect endogenous role\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Placed GATAD1 in the nucleus of cardiomyocytes and linked a human DCM-causing mutation (S102P) to disrupted nuclear localization and morphology, framing it as an epigenetic/chromatin regulator.\",\n      \"evidence\": \"Immunohistochemistry on human cardiac tissue with homozygosity mapping and exome sequencing\",\n      \"pmids\": [\"21965549\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Single primary method for the mechanistic claim\", \"Does not define molecular target genes\", \"H3K4me3 interaction is invoked but not demonstrated here\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identified an upstream regulatory input on GATAD1 itself, showing its transcription is positively controlled by 3' DNA methylation.\",\n      \"evidence\": \"COBRA, bisulfite sequencing, and DNMT inhibitor treatment of JAR cells with expression readout\",\n      \"pmids\": [\"24462704\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Mechanism by which 3' methylation enhances expression unknown\", \"Limited to choriocarcinoma cells\", \"No functional consequence for trophoblast biology established\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Confirmed GATAD1's functional requirement in cardiac maintenance in vivo and revealed dual nuclear and sarcomeric I-band localization.\",\n      \"evidence\": \"Fluorescent tagging/live imaging and TALEN knockout with cardiac phenotyping in zebrafish\",\n      \"pmids\": [\"28955713\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Functional role of sarcomeric localization undefined\", \"No molecular target genes identified\", \"Single model organism\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Defined a concrete molecular mechanism: GATAD1 promotes CCND1 transcription via long-range chromatin looping, establishing it as a chromatin architectural regulator driving cell-cycle progression in cancer.\",\n      \"evidence\": \"ChIP-qPCR, EMSA, 3C, microarray, siRNA knockdown, and orthotopic tumor transplantation in GBM\",\n      \"pmids\": [\"31286678\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Direct DNA-binding sequence specificity not fully resolved\", \"Whether looping is direct or via cofactors unknown\", \"Generalizability of the looping mechanism to other target genes untested\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Extended GATAD1's pro-proliferative role to thyroid carcinoma by placing it transcriptionally upstream of SRRM2.\",\n      \"evidence\": \"siRNA knockdown, overexpression, and SRRM2 epistasis rescue in thyroid carcinoma cells\",\n      \"pmids\": [\"36654960\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether GATAD1 binds the SRRM2 locus directly not shown\", \"No chromatin-level mechanism demonstrated\", \"Single cell-type study\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Showed GATAD1 sustains ER+ breast cancer proliferation by repressing p21, linking its activity to CDK2/4 and RB1 phosphorylation in cell-cycle control.\",\n      \"evidence\": \"CRISPR synthetic lethality screen, knockdown/overexpression, phospho-Western blot, and p21 rescue\",\n      \"pmids\": [\"37567972\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Direct vs indirect repression of p21 not resolved\", \"DNA-binding site at p21 locus not mapped\", \"Single cancer context\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Established GATAD1 as a cardiac metabolic gene regulator (repressing FAO genes, promoting Pdha1) required for ischemia-reperfusion cardioprotection, while a parallel study showed cardiomyocyte-autonomous loss is insufficient to cause cardiomyopathy.\",\n      \"evidence\": \"Cardiomyocyte-specific knockout mice with metabolic/functional phenotyping, dual reporter assays, and TAC/aging stress models\",\n      \"pmids\": [\"39626862\", \"39641830\"],\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Reconciliation of the metabolic phenotype with the absence of baseline cardiomyopathy unresolved\", \"Whether human DCM requires non-cardiomyocyte contributions unknown\", \"Direct binding at metabolic gene promoters not mapped\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Revealed a cell-type-specific endothelial function: GATAD1 controls CD36 expression and caveolae-mediated transcytosis to regulate blood-brain barrier permeability after ischemic stroke.\",\n      \"evidence\": \"Endothelial-specific conditional knockout mice with experimental stroke, BBB permeability assays, and CD36/transcytosis analysis\",\n      \"pmids\": [\"40965809\"],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"Whether GATAD1 binds the CD36 locus directly not shown\", \"Mechanism linking transcription to caveolae formation incomplete\", \"Single laboratory/model\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How GATAD1 selects target genes and whether its reported H3K4me3 interaction, chromatin looping, and Rab6 binding represent a single unified molecular mechanism across tissues remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"\",\n      \"gaps\": [\"No structural model or defined DNA-binding consensus\", \"Cofactors mediating chromatin looping unidentified\", \"Relationship between the Rab6 interaction and nuclear transcriptional roles unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [3, 4, 5, 6, 8]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [3]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 2, 6]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [3, 5, 6, 8]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [3, 4]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"RAB6\", \"Rab6-GAP\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"tie","faith_supported":5,"faith_total":6,"faith_pct":83.33333333333333}}