{"gene":"ANKS1A","run_date":"2026-04-28T17:12:37","timeline":{"discoveries":[{"year":2016,"finding":"Anks1a localizes to the endoplasmic reticulum (ER) upon serine phosphorylation, where its ankyrin repeat domain binds EphA2 to accumulate it at ER exit sites, while its PTB domain simultaneously binds Sec23, thereby facilitating selective loading of EphA2 (and indirectly ErbB2, which forms a complex with EphA2 in the ER) into COPII vesicles for anterograde transport to the cell surface.","method":"Co-immunoprecipitation, domain-specific binding assays, live-cell imaging, COPII vesicle reconstitution, Anks1a knockout mice, knockdown in primary mammary tumor cells","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (Co-IP, domain mutagenesis, KO mouse, cell-surface trafficking assays) in a single thorough study","pmids":["27619642","27802842"],"is_preprint":false},{"year":2013,"finding":"Odin (ANKS1A) functions as an effector of EGFR recycling: overexpression increases EGF-induced EGFR trafficking to recycling endosomes and back to the cell surface while reducing lysosomal degradation, whereas Odin knockdown accelerates EGFR lysosomal trafficking and degradation. Tyrosine phosphorylation of Odin is induced by EGF stimulation prior to EGFR internalization and independently of EGFR-to-ERK signaling.","method":"Overexpression and siRNA knockdown in HEK293 and RVH6849 cells, EGFR trafficking assays (recycling vs. degradation), phosphorylation time-course analysis","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 — clean KD/OE with defined cellular phenotype in two cell lines, but single lab","pmids":["23825523"],"is_preprint":false},{"year":2008,"finding":"Odin (ANKS1A) is a substrate of Src family kinases (SFK) in colorectal cancer cells: it was identified among tyrosine-phosphorylated proteins purified by LckSH2 affinity chromatography, and its phosphotyrosine levels decreased substantially upon SFK inhibition in SW620 cells.","method":"SH2 domain affinity chromatography, mass spectrometry, SFK inhibitor treatment with phosphotyrosine detection","journal":"Cell communication and signaling : CCS","confidence":"Medium","confidence_rationale":"Tier 2 — MS identification confirmed by pharmacological inhibition in cells, single lab","pmids":["18844995"],"is_preprint":false},{"year":2023,"finding":"ANKS1A associates with the NPXY motifs of LRP1 (via its PTB domain) in brain endothelial cells and facilitates transport of LRP1 from the ER to the cell surface; ANKS1A deficiency reduces cell-surface LRP1 levels and impairs amyloid-β clearance across the blood-brain barrier.","method":"Co-immunoprecipitation (ANKS1A–LRP1 NPXY interaction), endothelial-specific KO mouse, iPSC-derived BBB model with ANKS1A-null or rs6930932-variant endothelial cells, Aβ transcytosis assays, gene therapy rescue","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP, multiple KO/KD systems (mouse, human iBBB), functional Aβ clearance readout, gene therapy rescue; strong within a single study","pmids":["38123547"],"is_preprint":false},{"year":2019,"finding":"Anks1a (PTB adaptor) is required for proper differentiation of ependymal cells in the postnatal rodent brain: Anks1a-deficient ependymal cells display type B (neural stem) cell characteristics, and overexpression of Anks1a in the neonatal lateral wall increases ependymal cell number.","method":"Gene-trap LacZ reporter for expression mapping, Anks1a-deficient mouse analysis, in vivo overexpression in neonatal brain","journal":"Molecules and cells","confidence":"Medium","confidence_rationale":"Tier 2 — loss-of-function and gain-of-function in vivo with defined differentiation phenotype, single lab","pmids":["30759972"],"is_preprint":false},{"year":2023,"finding":"ANKS1A deficiency in ependymal cells increases entry of intraflagellar transport (IFT) machinery (IFT88-positive trains) into multicilia, elevates extracellular vesicle (ECV) numbers along cilia, and causes accumulation of the ciliary membrane protein Vangl2 in cilia and ECVs, indicating that ANKS1A normally restricts IFT entry into multicilia.","method":"Immunofluorescence of IFT88 and Vangl2 in ANKS1A-deficient ependymal cells, primary ependymal culture ECV isolation and analysis, isolated cilia imaging","journal":"Molecules and cells","confidence":"Medium","confidence_rationale":"Tier 3 — imaging-based loss-of-function with multiple markers, single lab but consistent across assays","pmids":["38052491"],"is_preprint":false},{"year":2022,"finding":"Anks1a interacts with the activated (GTP-bound) form of Rac1 and accumulates at the active cell edge enriched with active Rac1 in mesenchymal-type breast cancer cells; overexpression of Anks1a increases migration of HER2-overexpressing SK-BR-3 cells, an effect attributed to its role in EGF receptor trafficking rather than direct Rac1 effector activity.","method":"Co-immunoprecipitation of Anks1a with active Rac1, live-cell migration assays, esiRNA knockdown and overexpression in multiple breast cancer cell lines","journal":"Biochemistry. Biokhimiia","confidence":"Low","confidence_rationale":"Tier 3 — single Co-IP plus migration assay, single lab, partial mechanistic resolution","pmids":["36717454"],"is_preprint":false}],"current_model":"ANKS1A (Odin) is a PTB/ankyrin-repeat adaptor that localizes to the ER upon serine phosphorylation and acts as a cargo adaptor for COPII-mediated ER export of receptor tyrosine kinases (EphA2, ErbB2, LRP1) by simultaneously binding cargo NPXY motifs via its ankyrin repeats/PTB domain and the COPII coat component Sec23; it is also a Src family kinase substrate that regulates EGFR endocytic recycling versus lysosomal degradation, and is required for ependymal cell differentiation and normal multicilia protein-transport homeostasis in the brain."},"narrative":{"teleology":[{"year":2008,"claim":"Identifying ANKS1A as a Src family kinase substrate established it as a signaling-responsive phosphoprotein in cancer cells, raising the question of what biological process its phosphorylation controls.","evidence":"SH2 affinity chromatography and mass spectrometry in SW620 colorectal cancer cells with SFK inhibitor validation","pmids":["18844995"],"confidence":"Medium","gaps":["Specific phosphorylation sites were not mapped","Functional consequence of SFK-dependent phosphorylation was not determined","Single cell line; generality unknown"]},{"year":2013,"claim":"Demonstrating that ANKS1A directs internalized EGFR toward recycling endosomes and away from lysosomes revealed a trafficking-regulatory function, connecting its phosphorylation to receptor fate decisions.","evidence":"Overexpression and siRNA knockdown in HEK293 and RVH6849 cells with EGFR recycling and degradation assays","pmids":["23825523"],"confidence":"Medium","gaps":["Mechanism by which ANKS1A diverts EGFR from the lysosomal pathway was not defined","Direct EGFR–ANKS1A physical interaction at endosomes was not shown","Single lab; not independently replicated"]},{"year":2016,"claim":"Reconstituting ANKS1A as a COPII cargo adaptor — binding EphA2 via ankyrin repeats and Sec23 via the PTB domain at ER exit sites — resolved its molecular mechanism in anterograde trafficking and explained how specific receptors are selected for ER export.","evidence":"Co-IP, domain mutagenesis, COPII vesicle reconstitution, Anks1a knockout mice, knockdown in primary mammary tumor cells","pmids":["27619642","27802842"],"confidence":"High","gaps":["Structural basis of the ankyrin-repeat–NPXY and PTB–Sec23 interfaces not resolved","Whether ANKS1A acts on other NPXY-containing cargoes beyond EphA2/ErbB2 was unknown at this point"]},{"year":2019,"claim":"Showing that Anks1a loss prevents ependymal cell differentiation in the postnatal brain extended its function from receptor trafficking to a developmental cell-fate decision, linking its adaptor activity to brain homeostasis.","evidence":"Anks1a-deficient mouse analysis, gene-trap reporter, in vivo neonatal overexpression","pmids":["30759972"],"confidence":"Medium","gaps":["Which cargo(es) must be trafficked by ANKS1A for ependymal differentiation was not identified","Single lab; mechanistic link to COPII pathway in this context not tested"]},{"year":2022,"claim":"Detection of an ANKS1A–active-Rac1 interaction at the leading edge of migrating breast cancer cells suggested a possible additional role in cell migration, though this was attributed to its effects on EGFR trafficking rather than direct Rac1 effector function.","evidence":"Co-immunoprecipitation with GTP-Rac1, live-cell migration assays, esiRNA knockdown in breast cancer lines","pmids":["36717454"],"confidence":"Low","gaps":["Single Co-IP without reciprocal or domain-mapping validation","Causality between Rac1 binding and migration phenotype not distinguished from EGFR trafficking effects","Single lab, partial mechanistic resolution"]},{"year":2023,"claim":"Extending the COPII adaptor model to LRP1 in brain endothelial cells — and linking ANKS1A deficiency to impaired amyloid-β transcytosis — generalized the cargo adaptor mechanism and established disease relevance for blood-brain barrier function.","evidence":"Co-IP of ANKS1A–LRP1 NPXY interaction, endothelial-specific KO mouse, iPSC-derived BBB model, Aβ transcytosis assays, gene therapy rescue","pmids":["38123547"],"confidence":"High","gaps":["Whether the ANKS1A rs6930932 variant is a genetic risk factor for Alzheimer's disease in population studies was not established","Full repertoire of NPXY-containing cargoes handled by ANKS1A in vivo remains undefined"]},{"year":2023,"claim":"Revealing that ANKS1A restricts IFT entry into ependymal multicilia and controls ciliary membrane protein (Vangl2) and extracellular vesicle homeostasis added a cilia-regulatory dimension to its function beyond ER export.","evidence":"Immunofluorescence of IFT88 and Vangl2 in ANKS1A-deficient ependymal cells, primary culture ECV analysis","pmids":["38052491"],"confidence":"Medium","gaps":["Molecular mechanism by which ANKS1A restricts IFT entry is unknown","Whether this ciliary function depends on the same PTB–Sec23 interaction used in COPII trafficking is untested","Single lab with imaging-based readout"]},{"year":null,"claim":"How ANKS1A's COPII adaptor function, endocytic recycling role, and ciliary IFT-restriction activity are coordinated — and whether they share a common PTB/ankyrin-dependent mechanism — remains unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structural data for any ANKS1A domain–partner interface","Complete in vivo cargo repertoire unknown","Relationship between serine phosphorylation-dependent ER localization and tyrosine phosphorylation by SFKs is undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,3]},{"term_id":"GO:0038024","term_label":"cargo receptor activity","supporting_discovery_ids":[0,3]}],"localization":[{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[0,3]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[1]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[5]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[0,3]},{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[0,1,3]}],"complexes":[],"partners":["SEC23A","EPHA2","ERBB2","LRP1","EGFR","IFT88"],"other_free_text":[]},"mechanistic_narrative":"ANKS1A (Odin) is a PTB- and ankyrin-repeat-containing adaptor protein that functions as a cargo-specific sorting factor in COPII-mediated ER-to-cell-surface transport and in receptor tyrosine kinase endocytic trafficking. Upon serine phosphorylation it localizes to the ER, where its ankyrin repeat domain binds NPXY motifs on cargo receptors (EphA2, LRP1) while its PTB domain simultaneously engages the COPII coat subunit Sec23, thereby selectively loading these receptors into COPII vesicles for anterograde transport [PMID:27619642, PMID:38123547]. ANKS1A also regulates EGFR post-endocytic fate: it promotes recycling of internalized EGFR to the plasma membrane and suppresses lysosomal degradation, functioning downstream of Src family kinase-mediated tyrosine phosphorylation [PMID:23825523, PMID:18844995]. In the postnatal brain, ANKS1A is required for ependymal cell differentiation and restricts intraflagellar transport entry into multicilia, thereby controlling ciliary membrane protein homeostasis [PMID:30759972, PMID:38052491]."},"prefetch_data":{"uniprot":{"accession":"Q92625","full_name":"Ankyrin repeat and SAM domain-containing protein 1A","aliases":["Odin"],"length_aa":1134,"mass_kda":123.1,"function":"Regulator of different signaling pathways. Regulates EPHA8 receptor tyrosine kinase signaling to control cell migration and neurite retraction (By similarity)","subcellular_location":"Cytoplasm; Cell projection","url":"https://www.uniprot.org/uniprotkb/Q92625/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/ANKS1A","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/ANKS1A","total_profiled":1310},"omim":[{"mim_id":"620678","title":"RAS AND RAB INTERACTOR-LIKE PROTEIN; RINL","url":"https://www.omim.org/entry/620678"},{"mim_id":"608994","title":"ANKYRIN REPEAT AND STERILE ALPHA MOTIF DOMAINS-CONTAINING PROTEIN 1A; ANKS1A","url":"https://www.omim.org/entry/608994"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/ANKS1A"},"hgnc":{"alias_symbol":["KIAA0229"],"prev_symbol":["ANKS1"]},"alphafold":{"accession":"Q92625","domains":[{"cath_id":"1.25.40.20","chopping":"2-25_71-142","consensus_level":"medium","plddt":89.1705,"start":2,"end":142},{"cath_id":"1.25.40.20","chopping":"213-309","consensus_level":"medium","plddt":91.9321,"start":213,"end":309},{"cath_id":"1.10.150.50","chopping":"699-762","consensus_level":"medium","plddt":85.8334,"start":699,"end":762},{"cath_id":"1.10.150.50","chopping":"776-831","consensus_level":"medium","plddt":84.975,"start":776,"end":831},{"cath_id":"2.30.29.30","chopping":"933-1073","consensus_level":"high","plddt":89.2597,"start":933,"end":1073}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q92625","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q92625-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q92625-F1-predicted_aligned_error_v6.png","plddt_mean":60.16},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ANKS1A","jax_strain_url":"https://www.jax.org/strain/search?query=ANKS1A"},"sequence":{"accession":"Q92625","fasta_url":"https://rest.uniprot.org/uniprotkb/Q92625.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q92625/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q92625"}},"corpus_meta":[{"pmid":"18844995","id":"PMC_18844995","title":"Odin (ANKS1A) is a Src family kinase target in colorectal cancer cells.","date":"2008","source":"Cell communication and signaling : CCS","url":"https://pubmed.ncbi.nlm.nih.gov/18844995","citation_count":25,"is_preprint":false},{"pmid":"27619642","id":"PMC_27619642","title":"Anks1a regulates COPII-mediated anterograde transport of receptor tyrosine kinases critical for tumorigenesis.","date":"2016","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/27619642","citation_count":25,"is_preprint":false},{"pmid":"38123547","id":"PMC_38123547","title":"ANKS1A regulates LDL receptor-related protein 1 (LRP1)-mediated cerebrovascular clearance in brain endothelial cells.","date":"2023","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/38123547","citation_count":24,"is_preprint":false},{"pmid":"23825523","id":"PMC_23825523","title":"Odin (ANKS1A) modulates EGF receptor recycling and stability.","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23825523","citation_count":20,"is_preprint":false},{"pmid":"30759972","id":"PMC_30759972","title":"Ependymal Cells Require Anks1a for Their Proper Development.","date":"2019","source":"Molecules and cells","url":"https://pubmed.ncbi.nlm.nih.gov/30759972","citation_count":8,"is_preprint":false},{"pmid":"27802842","id":"PMC_27802842","title":"Defective Anks1a disrupts the export of receptor tyrosine kinases from the endoplasmic reticulum.","date":"2016","source":"BMB reports","url":"https://pubmed.ncbi.nlm.nih.gov/27802842","citation_count":3,"is_preprint":false},{"pmid":"38052491","id":"PMC_38052491","title":"ANKS1A-Deficiency Aberrantly Increases the Entry of the Protein Transport Machinery into the Ependymal Cilia.","date":"2023","source":"Molecules and cells","url":"https://pubmed.ncbi.nlm.nih.gov/38052491","citation_count":3,"is_preprint":false},{"pmid":"34130940","id":"PMC_34130940","title":"ANKS1A genotype predicts cardiovascular events in patients with familial hypercholesterolemia.","date":"2021","source":"Journal of clinical lipidology","url":"https://pubmed.ncbi.nlm.nih.gov/34130940","citation_count":3,"is_preprint":false},{"pmid":"36717454","id":"PMC_36717454","title":"The Role of the Adapter Protein Anks1a in the Regulation of Breast Cancer Cell Motility.","date":"2022","source":"Biochemistry. Biokhimiia","url":"https://pubmed.ncbi.nlm.nih.gov/36717454","citation_count":1,"is_preprint":false},{"pmid":"38196138","id":"PMC_38196138","title":"Cerebral Cavernous Malformation (CCM)-like Vessel Lesion in the Aged ANKS1A-deficient Brain.","date":"2023","source":"Experimental neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/38196138","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.10.25.619688","title":"Mapping DNA Methylation to Cardiac Pathologies Induced by Beta-Adrenergic Stimulation in a Large Panel of Mice","date":"2024-10-26","source":"bioRxiv","url":"https://doi.org/10.1101/2024.10.25.619688","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":6681,"output_tokens":1949,"usd":0.024639},"stage2":{"model":"claude-opus-4-6","input_tokens":5219,"output_tokens":2247,"usd":0.123405},"total_usd":0.148044,"stage1_batch_id":"msgbatch_01TqNM6p6FsoMBT2jzQTwKBr","stage2_batch_id":"msgbatch_01Ya473eco8sTHbvRymQaU8o","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2016,\n      \"finding\": \"Anks1a localizes to the endoplasmic reticulum (ER) upon serine phosphorylation, where its ankyrin repeat domain binds EphA2 to accumulate it at ER exit sites, while its PTB domain simultaneously binds Sec23, thereby facilitating selective loading of EphA2 (and indirectly ErbB2, which forms a complex with EphA2 in the ER) into COPII vesicles for anterograde transport to the cell surface.\",\n      \"method\": \"Co-immunoprecipitation, domain-specific binding assays, live-cell imaging, COPII vesicle reconstitution, Anks1a knockout mice, knockdown in primary mammary tumor cells\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (Co-IP, domain mutagenesis, KO mouse, cell-surface trafficking assays) in a single thorough study\",\n      \"pmids\": [\"27619642\", \"27802842\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Odin (ANKS1A) functions as an effector of EGFR recycling: overexpression increases EGF-induced EGFR trafficking to recycling endosomes and back to the cell surface while reducing lysosomal degradation, whereas Odin knockdown accelerates EGFR lysosomal trafficking and degradation. Tyrosine phosphorylation of Odin is induced by EGF stimulation prior to EGFR internalization and independently of EGFR-to-ERK signaling.\",\n      \"method\": \"Overexpression and siRNA knockdown in HEK293 and RVH6849 cells, EGFR trafficking assays (recycling vs. degradation), phosphorylation time-course analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — clean KD/OE with defined cellular phenotype in two cell lines, but single lab\",\n      \"pmids\": [\"23825523\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Odin (ANKS1A) is a substrate of Src family kinases (SFK) in colorectal cancer cells: it was identified among tyrosine-phosphorylated proteins purified by LckSH2 affinity chromatography, and its phosphotyrosine levels decreased substantially upon SFK inhibition in SW620 cells.\",\n      \"method\": \"SH2 domain affinity chromatography, mass spectrometry, SFK inhibitor treatment with phosphotyrosine detection\",\n      \"journal\": \"Cell communication and signaling : CCS\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — MS identification confirmed by pharmacological inhibition in cells, single lab\",\n      \"pmids\": [\"18844995\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ANKS1A associates with the NPXY motifs of LRP1 (via its PTB domain) in brain endothelial cells and facilitates transport of LRP1 from the ER to the cell surface; ANKS1A deficiency reduces cell-surface LRP1 levels and impairs amyloid-β clearance across the blood-brain barrier.\",\n      \"method\": \"Co-immunoprecipitation (ANKS1A–LRP1 NPXY interaction), endothelial-specific KO mouse, iPSC-derived BBB model with ANKS1A-null or rs6930932-variant endothelial cells, Aβ transcytosis assays, gene therapy rescue\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, multiple KO/KD systems (mouse, human iBBB), functional Aβ clearance readout, gene therapy rescue; strong within a single study\",\n      \"pmids\": [\"38123547\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Anks1a (PTB adaptor) is required for proper differentiation of ependymal cells in the postnatal rodent brain: Anks1a-deficient ependymal cells display type B (neural stem) cell characteristics, and overexpression of Anks1a in the neonatal lateral wall increases ependymal cell number.\",\n      \"method\": \"Gene-trap LacZ reporter for expression mapping, Anks1a-deficient mouse analysis, in vivo overexpression in neonatal brain\",\n      \"journal\": \"Molecules and cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function and gain-of-function in vivo with defined differentiation phenotype, single lab\",\n      \"pmids\": [\"30759972\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ANKS1A deficiency in ependymal cells increases entry of intraflagellar transport (IFT) machinery (IFT88-positive trains) into multicilia, elevates extracellular vesicle (ECV) numbers along cilia, and causes accumulation of the ciliary membrane protein Vangl2 in cilia and ECVs, indicating that ANKS1A normally restricts IFT entry into multicilia.\",\n      \"method\": \"Immunofluorescence of IFT88 and Vangl2 in ANKS1A-deficient ependymal cells, primary ependymal culture ECV isolation and analysis, isolated cilia imaging\",\n      \"journal\": \"Molecules and cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — imaging-based loss-of-function with multiple markers, single lab but consistent across assays\",\n      \"pmids\": [\"38052491\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Anks1a interacts with the activated (GTP-bound) form of Rac1 and accumulates at the active cell edge enriched with active Rac1 in mesenchymal-type breast cancer cells; overexpression of Anks1a increases migration of HER2-overexpressing SK-BR-3 cells, an effect attributed to its role in EGF receptor trafficking rather than direct Rac1 effector activity.\",\n      \"method\": \"Co-immunoprecipitation of Anks1a with active Rac1, live-cell migration assays, esiRNA knockdown and overexpression in multiple breast cancer cell lines\",\n      \"journal\": \"Biochemistry. Biokhimiia\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — single Co-IP plus migration assay, single lab, partial mechanistic resolution\",\n      \"pmids\": [\"36717454\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ANKS1A (Odin) is a PTB/ankyrin-repeat adaptor that localizes to the ER upon serine phosphorylation and acts as a cargo adaptor for COPII-mediated ER export of receptor tyrosine kinases (EphA2, ErbB2, LRP1) by simultaneously binding cargo NPXY motifs via its ankyrin repeats/PTB domain and the COPII coat component Sec23; it is also a Src family kinase substrate that regulates EGFR endocytic recycling versus lysosomal degradation, and is required for ependymal cell differentiation and normal multicilia protein-transport homeostasis in the brain.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"ANKS1A (Odin) is a PTB- and ankyrin-repeat-containing adaptor protein that functions as a cargo-specific sorting factor in COPII-mediated ER-to-cell-surface transport and in receptor tyrosine kinase endocytic trafficking. Upon serine phosphorylation it localizes to the ER, where its ankyrin repeat domain binds NPXY motifs on cargo receptors (EphA2, LRP1) while its PTB domain simultaneously engages the COPII coat subunit Sec23, thereby selectively loading these receptors into COPII vesicles for anterograde transport [PMID:27619642, PMID:38123547]. ANKS1A also regulates EGFR post-endocytic fate: it promotes recycling of internalized EGFR to the plasma membrane and suppresses lysosomal degradation, functioning downstream of Src family kinase-mediated tyrosine phosphorylation [PMID:23825523, PMID:18844995]. In the postnatal brain, ANKS1A is required for ependymal cell differentiation and restricts intraflagellar transport entry into multicilia, thereby controlling ciliary membrane protein homeostasis [PMID:30759972, PMID:38052491].\",\n  \"teleology\": [\n    {\n      \"year\": 2008,\n      \"claim\": \"Identifying ANKS1A as a Src family kinase substrate established it as a signaling-responsive phosphoprotein in cancer cells, raising the question of what biological process its phosphorylation controls.\",\n      \"evidence\": \"SH2 affinity chromatography and mass spectrometry in SW620 colorectal cancer cells with SFK inhibitor validation\",\n      \"pmids\": [\"18844995\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Specific phosphorylation sites were not mapped\",\n        \"Functional consequence of SFK-dependent phosphorylation was not determined\",\n        \"Single cell line; generality unknown\"\n      ]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Demonstrating that ANKS1A directs internalized EGFR toward recycling endosomes and away from lysosomes revealed a trafficking-regulatory function, connecting its phosphorylation to receptor fate decisions.\",\n      \"evidence\": \"Overexpression and siRNA knockdown in HEK293 and RVH6849 cells with EGFR recycling and degradation assays\",\n      \"pmids\": [\"23825523\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Mechanism by which ANKS1A diverts EGFR from the lysosomal pathway was not defined\",\n        \"Direct EGFR–ANKS1A physical interaction at endosomes was not shown\",\n        \"Single lab; not independently replicated\"\n      ]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Reconstituting ANKS1A as a COPII cargo adaptor — binding EphA2 via ankyrin repeats and Sec23 via the PTB domain at ER exit sites — resolved its molecular mechanism in anterograde trafficking and explained how specific receptors are selected for ER export.\",\n      \"evidence\": \"Co-IP, domain mutagenesis, COPII vesicle reconstitution, Anks1a knockout mice, knockdown in primary mammary tumor cells\",\n      \"pmids\": [\"27619642\", \"27802842\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Structural basis of the ankyrin-repeat–NPXY and PTB–Sec23 interfaces not resolved\",\n        \"Whether ANKS1A acts on other NPXY-containing cargoes beyond EphA2/ErbB2 was unknown at this point\"\n      ]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showing that Anks1a loss prevents ependymal cell differentiation in the postnatal brain extended its function from receptor trafficking to a developmental cell-fate decision, linking its adaptor activity to brain homeostasis.\",\n      \"evidence\": \"Anks1a-deficient mouse analysis, gene-trap reporter, in vivo neonatal overexpression\",\n      \"pmids\": [\"30759972\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Which cargo(es) must be trafficked by ANKS1A for ependymal differentiation was not identified\",\n        \"Single lab; mechanistic link to COPII pathway in this context not tested\"\n      ]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Detection of an ANKS1A–active-Rac1 interaction at the leading edge of migrating breast cancer cells suggested a possible additional role in cell migration, though this was attributed to its effects on EGFR trafficking rather than direct Rac1 effector function.\",\n      \"evidence\": \"Co-immunoprecipitation with GTP-Rac1, live-cell migration assays, esiRNA knockdown in breast cancer lines\",\n      \"pmids\": [\"36717454\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"Single Co-IP without reciprocal or domain-mapping validation\",\n        \"Causality between Rac1 binding and migration phenotype not distinguished from EGFR trafficking effects\",\n        \"Single lab, partial mechanistic resolution\"\n      ]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Extending the COPII adaptor model to LRP1 in brain endothelial cells — and linking ANKS1A deficiency to impaired amyloid-β transcytosis — generalized the cargo adaptor mechanism and established disease relevance for blood-brain barrier function.\",\n      \"evidence\": \"Co-IP of ANKS1A–LRP1 NPXY interaction, endothelial-specific KO mouse, iPSC-derived BBB model, Aβ transcytosis assays, gene therapy rescue\",\n      \"pmids\": [\"38123547\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether the ANKS1A rs6930932 variant is a genetic risk factor for Alzheimer's disease in population studies was not established\",\n        \"Full repertoire of NPXY-containing cargoes handled by ANKS1A in vivo remains undefined\"\n      ]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Revealing that ANKS1A restricts IFT entry into ependymal multicilia and controls ciliary membrane protein (Vangl2) and extracellular vesicle homeostasis added a cilia-regulatory dimension to its function beyond ER export.\",\n      \"evidence\": \"Immunofluorescence of IFT88 and Vangl2 in ANKS1A-deficient ependymal cells, primary culture ECV analysis\",\n      \"pmids\": [\"38052491\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Molecular mechanism by which ANKS1A restricts IFT entry is unknown\",\n        \"Whether this ciliary function depends on the same PTB–Sec23 interaction used in COPII trafficking is untested\",\n        \"Single lab with imaging-based readout\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How ANKS1A's COPII adaptor function, endocytic recycling role, and ciliary IFT-restriction activity are coordinated — and whether they share a common PTB/ankyrin-dependent mechanism — remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"No structural data for any ANKS1A domain–partner interface\",\n        \"Complete in vivo cargo repertoire unknown\",\n        \"Relationship between serine phosphorylation-dependent ER localization and tyrosine phosphorylation by SFKs is undefined\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 3]},\n      {\"term_id\": \"GO:0038024\", \"supporting_discovery_ids\": [0, 3]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [0, 3]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [1]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [5]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [0, 3]},\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [0, 1, 3]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"SEC23A\",\n      \"EPHA2\",\n      \"ERBB2\",\n      \"LRP1\",\n      \"EGFR\",\n      \"IFT88\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}