{"gene":"ANKS1A","run_date":"2026-06-09T22:02:43","timeline":{"discoveries":[{"year":2016,"finding":"Anks1a localizes to the ER membrane upon serine phosphorylation. Once at the ER, its ankyrin repeat domain binds EphA2 causing it to accumulate at ER exit sites, while its PTB domain binds Sec23, together facilitating selective COPII-mediated ER export of EphA2. EphA2 in turn binds ErbB2 in the ER and loads ErbB2 into COPII carriers, enabling ErbB2 cell surface delivery.","method":"Subcellular fractionation/localization, co-immunoprecipitation of Anks1a with EphA2 and Sec23, domain mapping (ankyrin repeat vs PTB), COPII vesicle assay, Anks1a knockout mouse model with ErbB2-induced tumorigenesis readout, knockdown of Anks1a in primary mammary tumor cells","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP with domain mapping, multiple orthogonal methods (localization, vesicle assay, KO mouse phenocopy of EphA2 KO), replicated in companion BMB Reports commentary","pmids":["27619642","27802842"],"is_preprint":false},{"year":2023,"finding":"ANKS1A associates with the NPXY motifs of LRP1 and facilitates transport of LRP1 from the endoplasmic reticulum to the cell surface in brain endothelial cells. Endothelial ANKS1A deficiency reduces cell-surface LRP1 levels and impairs Aβ clearance across the blood-brain barrier, worsening Aβ pathology and cognitive deficits in an Alzheimer's disease mouse model.","method":"Co-immunoprecipitation (ANKS1A with LRP1 NPXY motifs), cell-surface biotinylation, ANKS1A KO mouse crossed with AD model, gene therapy rescue with endothelial-specific ANKS1A, iPSC-derived BBB organoids from ANKS1A-null or rs6930932-variant cells","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP with domain specificity, KO mouse model with cognitive phenotype rescue, human iPSC-derived BBB functional validation; multiple orthogonal methods in single study","pmids":["38123547"],"is_preprint":false},{"year":2013,"finding":"Odin (ANKS1A) functions as an effector of EGFR recycling: tyrosine phosphorylation of Odin is induced prior to EGFR internalization after EGF stimulation. Odin overexpression increases EGFR trafficking to recycling endosomes and back to the cell surface, while Odin knockdown decreases EGFR recycling and accelerates lysosomal trafficking and degradation.","method":"EGFR trafficking assays (recycling endosome and lysosome fractionation/imaging), Odin overexpression and siRNA knockdown in HEK293 and NSCLC RVH6849 cells, phosphotyrosine time-course analysis","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — defined cellular phenotype with both OE and KD, trafficking readout in two cell lines, single lab","pmids":["23825523"],"is_preprint":false},{"year":2008,"finding":"Odin (ANKS1A) is a substrate of Src family kinases (SFK) in colorectal cancer cells: Odin tyrosine phosphorylation is substantially reduced upon SFK inhibition in SW620 cells, identifying it as a novel SFK target in epithelial cancer cells.","method":"LckSH2 domain affinity chromatography followed by mass spectrometry to identify phosphotyrosine proteins; SFK inhibitor treatment with phosphotyrosine western blot confirmation","journal":"Cell communication and signaling : CCS","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — MS identification plus functional confirmation with kinase inhibitor, single lab","pmids":["18844995"],"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 cell (radial glial-like) characteristics indicating a differentiation arrest, while Anks1a overexpression in the lateral wall increases ependymal cell numbers.","method":"Anks1a gene-trap LacZ reporter for expression mapping, Anks1a KO mouse analysis of ependymal cell markers, Anks1a overexpression in neonatal brain lateral wall","journal":"Molecules and cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KO and OE with defined cellular differentiation phenotype, single lab","pmids":["30759972"],"is_preprint":false},{"year":2023,"finding":"ANKS1A deficiency in ependymal cells increases entry of IFT (intraflagellar transport) machinery (IFT88-positive trains) into multicilia, leads to increased extracellular vesicle (ECV) formation along cilia, and causes accumulation of the ciliary membrane protein Vangl2 in cilia and ECVs, suggesting ANKS1A normally limits aberrant protein entry into cilia and that ECV-based disposal compensates for its absence.","method":"Immunofluorescence of isolated cilia from ANKS1A KO ependymal cells, primary ependymal culture ECV isolation, IFT88 and Vangl2 quantification by imaging and western blot","journal":"Molecules and cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KO with multiple quantitative cellular phenotypes (IFT train number, ECV count, protein composition), single lab","pmids":["38052491"],"is_preprint":false},{"year":2022,"finding":"Anks1a interacts with the activated (GTP-bound) form of Rac1 and acts as a Rac1 effector. In HER2-negative MDA-MB-231 breast cancer cells, Anks1a accumulates at the active cell edge enriched with active Rac1. Overexpression of Anks1a selectively increases migration rate of HER2-overexpressing SK-BR-3 cells. Downregulation of ANKS1A had minimal effect on motility except a slight increase in MDA-MB-231 migration rate.","method":"Co-immunoprecipitation of Anks1a with activated Rac1 (GTPγS-loaded), live-cell imaging of migration, esiRNA knockdown and overexpression in breast cancer cell lines","journal":"Biochemistry. Biokhimiia","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP for Rac1 interaction, functional effects modest and cell-line dependent, single lab","pmids":["36717454"],"is_preprint":false},{"year":2023,"finding":"ANKS1A deficiency in aged mouse brain endothelial cells leads to CCM-like vessel lesions with peripheral blood leakage, immune cell infiltration, loss of astrocyte endfeet and tight junctions, and increased fibronectin expression in blood vessels (confirmed in cultured ANKS1A-deficient endothelial cells), indicating a role for ANKS1A in maintaining BBB integrity during aging.","method":"ANKS1A KO mouse histological analysis of aged brain vasculature, immunofluorescence for tight junction proteins, astrocyte endfeet markers, fibronectin; cultured endothelial cell fibronectin assay","journal":"Experimental neurobiology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — KO mouse phenotype with in vitro fibronectin confirmation, mechanistic pathway not resolved, single lab","pmids":["38196138"],"is_preprint":false}],"current_model":"ANKS1A (Odin) is a phosphotyrosine-binding (PTB) domain adaptor that localizes to the ER membrane upon serine phosphorylation, where it bridges cargo receptor tyrosine kinases (EphA2, LRP1) via its ankyrin repeat domain to the COPII coat component Sec23 via its PTB domain, thereby facilitating selective ER-to-surface export of EphA2/ErbB2 and LRP1; at the cell surface, ANKS1A—itself a substrate of Src family kinases and an effector of active Rac1—additionally regulates EGFR endocytic recycling versus lysosomal degradation, and in specialized brain cells it controls ependymal cell differentiation and limits aberrant protein entry into multicilia."},"narrative":{"mechanistic_narrative":"ANKS1A (Odin) is a phosphotyrosine-binding (PTB) domain adaptor that controls the selective ER export and surface trafficking of cargo receptor tyrosine kinases and related receptors [PMID:27619642, PMID:27802842, PMID:38123547]. Upon serine phosphorylation it localizes to the ER membrane, where its ankyrin repeat domain engages EphA2 to drive accumulation at ER exit sites and its PTB domain binds the COPII coat component Sec23, coupling EphA2 (and EphA2-associated ErbB2) into COPII carriers for cell-surface delivery [PMID:27619642, PMID:27802842]. By the same adaptor logic, ANKS1A associates with the NPXY motifs of LRP1 to promote LRP1 transport from the ER to the surface of brain endothelial cells; loss of endothelial ANKS1A reduces surface LRP1, impairs Aβ clearance across the blood-brain barrier, and worsens Alzheimer's-like pathology and cognitive deficits in mice [PMID:38123547]. At the cell surface ANKS1A is itself tyrosine-phosphorylated by Src family kinases [PMID:18844995] and acts as an effector of EGFR post-endocytic sorting, promoting recycling of internalized EGFR back to the plasma membrane while limiting its lysosomal degradation [PMID:23825523]. In the postnatal brain ANKS1A is required for ependymal cell differentiation, with deficiency causing a differentiation arrest toward a radial glial-like state [PMID:30759972], and it restrains aberrant entry of IFT machinery and ciliary membrane proteins such as Vangl2 into multicilia [PMID:38052491].","teleology":[{"year":2008,"claim":"Established ANKS1A as a phosphoprotein under tyrosine kinase control, placing it downstream of Src family kinase signaling in cancer cells before its adaptor function was known.","evidence":"LckSH2 affinity chromatography plus mass spectrometry and SFK-inhibitor phosphotyrosine western blot in SW620 colorectal cancer cells","pmids":["18844995"],"confidence":"Medium","gaps":["Specific phosphotyrosine sites not mapped","Functional consequence of SFK phosphorylation not addressed","Single cell-line context"]},{"year":2013,"claim":"Assigned a cellular trafficking role to ANKS1A by showing it directs EGFR toward recycling rather than degradation, linking its tyrosine phosphorylation to receptor fate decisions.","evidence":"EGFR recycling/lysosomal trafficking assays with Odin overexpression and siRNA knockdown in HEK293 and NSCLC cells, plus phosphotyrosine time-course","pmids":["23825523"],"confidence":"Medium","gaps":["Direct EGFR-ANKS1A interaction not demonstrated","Molecular mechanism of recycling control unresolved","Single lab"]},{"year":2016,"claim":"Defined the core adaptor mechanism: ANKS1A bridges EphA2 (ankyrin repeats) to the COPII subunit Sec23 (PTB domain) to drive selective ER export of EphA2/ErbB2, explaining how it regulates surface receptor levels.","evidence":"Reciprocal Co-IP with domain mapping, COPII vesicle reconstitution, ER-exit-site localization, and Anks1a KO mouse with ErbB2 tumorigenesis readout","pmids":["27619642","27802842"],"confidence":"High","gaps":["Trigger for the ER-localizing serine phosphorylation not identified","Whether the same machinery operates for other cargoes not addressed here","No structural model of the ternary cargo-adaptor-COPII assembly"]},{"year":2019,"claim":"Extended ANKS1A function into tissue development by showing it is required for ependymal cell differentiation in the postnatal brain.","evidence":"Anks1a gene-trap LacZ expression mapping, KO analysis of ependymal markers, and overexpression in neonatal lateral wall","pmids":["30759972"],"confidence":"Medium","gaps":["Molecular cargo or signaling pathway driving differentiation not identified","Connection to the COPII/adaptor mechanism not established","Single lab"]},{"year":2022,"claim":"Proposed a surface signaling role linking ANKS1A to actin-based migration via the small GTPase Rac1.","evidence":"Co-IP of Anks1a with GTPγS-loaded Rac1 and migration assays in breast cancer cell lines with knockdown/overexpression","pmids":["36717454"],"confidence":"Low","gaps":["Single Co-IP without reciprocal validation for the Rac1 interaction","Migration effects modest and cell-line dependent","Mechanism connecting Rac1 binding to motility unresolved"]},{"year":2023,"claim":"Generalized the ER-export adaptor model to LRP1 in brain endothelium and tied ANKS1A directly to blood-brain-barrier Aβ clearance and Alzheimer's pathology.","evidence":"Co-IP with LRP1 NPXY motifs, surface biotinylation, ANKS1A KO crossed with an AD model with endothelial gene-therapy rescue, and human iPSC-derived BBB organoids","pmids":["38123547"],"confidence":"High","gaps":["Whether Sec23/COPII mediates LRP1 export as for EphA2 not directly shown","Contribution of non-endothelial ANKS1A to Aβ handling not addressed"]},{"year":2023,"claim":"Identified a ciliary surveillance function whereby ANKS1A limits aberrant IFT and membrane protein entry into multicilia.","evidence":"Immunofluorescence of isolated cilia and ECV isolation from ANKS1A KO ependymal cells, quantifying IFT88 trains and Vangl2","pmids":["38052491"],"confidence":"Medium","gaps":["Molecular mechanism by which ANKS1A gates ciliary entry unknown","Relationship to its ER-export adaptor role unclear","Single lab"]},{"year":2023,"claim":"Implicated ANKS1A in maintaining blood-brain-barrier integrity during aging through prevention of CCM-like vascular lesions.","evidence":"Histology and immunofluorescence of aged ANKS1A KO mouse brain vasculature plus cultured endothelial fibronectin assay","pmids":["38196138"],"confidence":"Low","gaps":["Causal pathway from ANKS1A loss to lesion formation not resolved","Link to LRP1/receptor trafficking not established","Single lab"]},{"year":null,"claim":"It remains unknown what signal triggers the serine phosphorylation that recruits ANKS1A to the ER and whether a single adaptor mechanism unifies its roles in COPII export, EGFR recycling, ciliary gating, and vascular maintenance.","evidence":"","pmids":[],"confidence":"Low","gaps":["Upstream kinase for ER-localizing serine phosphorylation unidentified","No structural model of the cargo-PTB-Sec23 assembly","Mechanistic link between trafficking and developmental/ciliary phenotypes unresolved"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,1]},{"term_id":"GO:0038024","term_label":"cargo receptor activity","supporting_discovery_ids":[0,1]}],"localization":[{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[0,1]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[2,6]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[5]}],"pathway":[{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[0,1]},{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[0,2]}],"complexes":[],"partners":["EPHA2","SEC23","LRP1","ERBB2","RAC1"],"other_free_text":[]}},"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":"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":27,"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":"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":"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":"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":4,"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":"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":7448,"output_tokens":2434,"usd":0.029427,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":9530,"output_tokens":3080,"usd":0.062325,"stage2_stop_reason":"end_turn"},"total_usd":0.091752,"stage1_batch_id":"msgbatch_0179Z2pxRYBsXi2xADneafRw","stage2_batch_id":"msgbatch_01LaY9ZaVdgjWArcZo9eqQE5","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2016,\n      \"finding\": \"Anks1a localizes to the ER membrane upon serine phosphorylation. Once at the ER, its ankyrin repeat domain binds EphA2 causing it to accumulate at ER exit sites, while its PTB domain binds Sec23, together facilitating selective COPII-mediated ER export of EphA2. EphA2 in turn binds ErbB2 in the ER and loads ErbB2 into COPII carriers, enabling ErbB2 cell surface delivery.\",\n      \"method\": \"Subcellular fractionation/localization, co-immunoprecipitation of Anks1a with EphA2 and Sec23, domain mapping (ankyrin repeat vs PTB), COPII vesicle assay, Anks1a knockout mouse model with ErbB2-induced tumorigenesis readout, knockdown of Anks1a in primary mammary tumor cells\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP with domain mapping, multiple orthogonal methods (localization, vesicle assay, KO mouse phenocopy of EphA2 KO), replicated in companion BMB Reports commentary\",\n      \"pmids\": [\"27619642\", \"27802842\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ANKS1A associates with the NPXY motifs of LRP1 and facilitates transport of LRP1 from the endoplasmic reticulum to the cell surface in brain endothelial cells. Endothelial ANKS1A deficiency reduces cell-surface LRP1 levels and impairs Aβ clearance across the blood-brain barrier, worsening Aβ pathology and cognitive deficits in an Alzheimer's disease mouse model.\",\n      \"method\": \"Co-immunoprecipitation (ANKS1A with LRP1 NPXY motifs), cell-surface biotinylation, ANKS1A KO mouse crossed with AD model, gene therapy rescue with endothelial-specific ANKS1A, iPSC-derived BBB organoids from ANKS1A-null or rs6930932-variant cells\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP with domain specificity, KO mouse model with cognitive phenotype rescue, human iPSC-derived BBB functional validation; multiple orthogonal methods in single study\",\n      \"pmids\": [\"38123547\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Odin (ANKS1A) functions as an effector of EGFR recycling: tyrosine phosphorylation of Odin is induced prior to EGFR internalization after EGF stimulation. Odin overexpression increases EGFR trafficking to recycling endosomes and back to the cell surface, while Odin knockdown decreases EGFR recycling and accelerates lysosomal trafficking and degradation.\",\n      \"method\": \"EGFR trafficking assays (recycling endosome and lysosome fractionation/imaging), Odin overexpression and siRNA knockdown in HEK293 and NSCLC RVH6849 cells, phosphotyrosine time-course analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — defined cellular phenotype with both OE and KD, trafficking readout in two cell lines, 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: Odin tyrosine phosphorylation is substantially reduced upon SFK inhibition in SW620 cells, identifying it as a novel SFK target in epithelial cancer cells.\",\n      \"method\": \"LckSH2 domain affinity chromatography followed by mass spectrometry to identify phosphotyrosine proteins; SFK inhibitor treatment with phosphotyrosine western blot confirmation\",\n      \"journal\": \"Cell communication and signaling : CCS\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — MS identification plus functional confirmation with kinase inhibitor, single lab\",\n      \"pmids\": [\"18844995\"],\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 cell (radial glial-like) characteristics indicating a differentiation arrest, while Anks1a overexpression in the lateral wall increases ependymal cell numbers.\",\n      \"method\": \"Anks1a gene-trap LacZ reporter for expression mapping, Anks1a KO mouse analysis of ependymal cell markers, Anks1a overexpression in neonatal brain lateral wall\",\n      \"journal\": \"Molecules and cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO and OE with defined cellular 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 IFT (intraflagellar transport) machinery (IFT88-positive trains) into multicilia, leads to increased extracellular vesicle (ECV) formation along cilia, and causes accumulation of the ciliary membrane protein Vangl2 in cilia and ECVs, suggesting ANKS1A normally limits aberrant protein entry into cilia and that ECV-based disposal compensates for its absence.\",\n      \"method\": \"Immunofluorescence of isolated cilia from ANKS1A KO ependymal cells, primary ependymal culture ECV isolation, IFT88 and Vangl2 quantification by imaging and western blot\",\n      \"journal\": \"Molecules and cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO with multiple quantitative cellular phenotypes (IFT train number, ECV count, protein composition), single lab\",\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 acts as a Rac1 effector. In HER2-negative MDA-MB-231 breast cancer cells, Anks1a accumulates at the active cell edge enriched with active Rac1. Overexpression of Anks1a selectively increases migration rate of HER2-overexpressing SK-BR-3 cells. Downregulation of ANKS1A had minimal effect on motility except a slight increase in MDA-MB-231 migration rate.\",\n      \"method\": \"Co-immunoprecipitation of Anks1a with activated Rac1 (GTPγS-loaded), live-cell imaging of migration, esiRNA knockdown and overexpression in breast cancer cell lines\",\n      \"journal\": \"Biochemistry. Biokhimiia\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP for Rac1 interaction, functional effects modest and cell-line dependent, single lab\",\n      \"pmids\": [\"36717454\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ANKS1A deficiency in aged mouse brain endothelial cells leads to CCM-like vessel lesions with peripheral blood leakage, immune cell infiltration, loss of astrocyte endfeet and tight junctions, and increased fibronectin expression in blood vessels (confirmed in cultured ANKS1A-deficient endothelial cells), indicating a role for ANKS1A in maintaining BBB integrity during aging.\",\n      \"method\": \"ANKS1A KO mouse histological analysis of aged brain vasculature, immunofluorescence for tight junction proteins, astrocyte endfeet markers, fibronectin; cultured endothelial cell fibronectin assay\",\n      \"journal\": \"Experimental neurobiology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — KO mouse phenotype with in vitro fibronectin confirmation, mechanistic pathway not resolved, single lab\",\n      \"pmids\": [\"38196138\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ANKS1A (Odin) is a phosphotyrosine-binding (PTB) domain adaptor that localizes to the ER membrane upon serine phosphorylation, where it bridges cargo receptor tyrosine kinases (EphA2, LRP1) via its ankyrin repeat domain to the COPII coat component Sec23 via its PTB domain, thereby facilitating selective ER-to-surface export of EphA2/ErbB2 and LRP1; at the cell surface, ANKS1A—itself a substrate of Src family kinases and an effector of active Rac1—additionally regulates EGFR endocytic recycling versus lysosomal degradation, and in specialized brain cells it controls ependymal cell differentiation and limits aberrant protein entry into multicilia.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ANKS1A (Odin) is a phosphotyrosine-binding (PTB) domain adaptor that controls the selective ER export and surface trafficking of cargo receptor tyrosine kinases and related receptors [#0, #1]. Upon serine phosphorylation it localizes to the ER membrane, where its ankyrin repeat domain engages EphA2 to drive accumulation at ER exit sites and its PTB domain binds the COPII coat component Sec23, coupling EphA2 (and EphA2-associated ErbB2) into COPII carriers for cell-surface delivery [#0]. By the same adaptor logic, ANKS1A associates with the NPXY motifs of LRP1 to promote LRP1 transport from the ER to the surface of brain endothelial cells; loss of endothelial ANKS1A reduces surface LRP1, impairs Aβ clearance across the blood-brain barrier, and worsens Alzheimer's-like pathology and cognitive deficits in mice [#1]. At the cell surface ANKS1A is itself tyrosine-phosphorylated by Src family kinases [#3] and acts as an effector of EGFR post-endocytic sorting, promoting recycling of internalized EGFR back to the plasma membrane while limiting its lysosomal degradation [#2]. In the postnatal brain ANKS1A is required for ependymal cell differentiation, with deficiency causing a differentiation arrest toward a radial glial-like state [#4], and it restrains aberrant entry of IFT machinery and ciliary membrane proteins such as Vangl2 into multicilia [#5].\",\n  \"teleology\": [\n    {\n      \"year\": 2008,\n      \"claim\": \"Established ANKS1A as a phosphoprotein under tyrosine kinase control, placing it downstream of Src family kinase signaling in cancer cells before its adaptor function was known.\",\n      \"evidence\": \"LckSH2 affinity chromatography plus mass spectrometry and SFK-inhibitor phosphotyrosine western blot in SW620 colorectal cancer cells\",\n      \"pmids\": [\"18844995\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Specific phosphotyrosine sites not mapped\", \"Functional consequence of SFK phosphorylation not addressed\", \"Single cell-line context\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Assigned a cellular trafficking role to ANKS1A by showing it directs EGFR toward recycling rather than degradation, linking its tyrosine phosphorylation to receptor fate decisions.\",\n      \"evidence\": \"EGFR recycling/lysosomal trafficking assays with Odin overexpression and siRNA knockdown in HEK293 and NSCLC cells, plus phosphotyrosine time-course\",\n      \"pmids\": [\"23825523\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct EGFR-ANKS1A interaction not demonstrated\", \"Molecular mechanism of recycling control unresolved\", \"Single lab\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Defined the core adaptor mechanism: ANKS1A bridges EphA2 (ankyrin repeats) to the COPII subunit Sec23 (PTB domain) to drive selective ER export of EphA2/ErbB2, explaining how it regulates surface receptor levels.\",\n      \"evidence\": \"Reciprocal Co-IP with domain mapping, COPII vesicle reconstitution, ER-exit-site localization, and Anks1a KO mouse with ErbB2 tumorigenesis readout\",\n      \"pmids\": [\"27619642\", \"27802842\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Trigger for the ER-localizing serine phosphorylation not identified\", \"Whether the same machinery operates for other cargoes not addressed here\", \"No structural model of the ternary cargo-adaptor-COPII assembly\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Extended ANKS1A function into tissue development by showing it is required for ependymal cell differentiation in the postnatal brain.\",\n      \"evidence\": \"Anks1a gene-trap LacZ expression mapping, KO analysis of ependymal markers, and overexpression in neonatal lateral wall\",\n      \"pmids\": [\"30759972\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular cargo or signaling pathway driving differentiation not identified\", \"Connection to the COPII/adaptor mechanism not established\", \"Single lab\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Proposed a surface signaling role linking ANKS1A to actin-based migration via the small GTPase Rac1.\",\n      \"evidence\": \"Co-IP of Anks1a with GTPγS-loaded Rac1 and migration assays in breast cancer cell lines with knockdown/overexpression\",\n      \"pmids\": [\"36717454\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Single Co-IP without reciprocal validation for the Rac1 interaction\", \"Migration effects modest and cell-line dependent\", \"Mechanism connecting Rac1 binding to motility unresolved\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Generalized the ER-export adaptor model to LRP1 in brain endothelium and tied ANKS1A directly to blood-brain-barrier Aβ clearance and Alzheimer's pathology.\",\n      \"evidence\": \"Co-IP with LRP1 NPXY motifs, surface biotinylation, ANKS1A KO crossed with an AD model with endothelial gene-therapy rescue, and human iPSC-derived BBB organoids\",\n      \"pmids\": [\"38123547\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Sec23/COPII mediates LRP1 export as for EphA2 not directly shown\", \"Contribution of non-endothelial ANKS1A to Aβ handling not addressed\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified a ciliary surveillance function whereby ANKS1A limits aberrant IFT and membrane protein entry into multicilia.\",\n      \"evidence\": \"Immunofluorescence of isolated cilia and ECV isolation from ANKS1A KO ependymal cells, quantifying IFT88 trains and Vangl2\",\n      \"pmids\": [\"38052491\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mechanism by which ANKS1A gates ciliary entry unknown\", \"Relationship to its ER-export adaptor role unclear\", \"Single lab\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Implicated ANKS1A in maintaining blood-brain-barrier integrity during aging through prevention of CCM-like vascular lesions.\",\n      \"evidence\": \"Histology and immunofluorescence of aged ANKS1A KO mouse brain vasculature plus cultured endothelial fibronectin assay\",\n      \"pmids\": [\"38196138\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Causal pathway from ANKS1A loss to lesion formation not resolved\", \"Link to LRP1/receptor trafficking not established\", \"Single lab\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unknown what signal triggers the serine phosphorylation that recruits ANKS1A to the ER and whether a single adaptor mechanism unifies its roles in COPII export, EGFR recycling, ciliary gating, and vascular maintenance.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Upstream kinase for ER-localizing serine phosphorylation unidentified\", \"No structural model of the cargo-PTB-Sec23 assembly\", \"Mechanistic link between trafficking and developmental/ciliary phenotypes unresolved\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 1]},\n      {\"term_id\": \"GO:0038024\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [0, 1]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [2, 6]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [5]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [0, 1]},\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [0, 2]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"EphA2\", \"Sec23\", \"LRP1\", \"ErbB2\", \"Rac1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}