{"gene":"TMEM215","run_date":"2026-06-10T10:51:55","timeline":{"discoveries":[{"year":2023,"finding":"TMEM215 is an endoplasmic reticulum-located 2-pass transmembrane protein that binds the chaperone BiP (GRP78) and facilitates the interaction of BiP with the BH3-only proapoptotic protein BIK. TMEM215 knockdown increases mitochondria-associated ER membrane (MAM) contacts and mitochondrial calcium influx; blocking IP3R or MCU (mitochondrial calcium uniporter) abrogates TMEM215-knockdown-induced apoptosis, placing TMEM215 upstream of BIK-triggered ER-to-mitochondrial Ca2+ influx and apoptosis.","method":"Immunoprecipitation-mass spectrometry to identify binding partners (BiP, BIK); siRNA knockdown of TMEM215 in HUVECs; rescue with BCL-2 overexpression; IP3R and MCU inhibition; EM quantification of MAM contacts; conditional EC-specific knockout mouse; retinal vasculature regression assay","journal":"Circulation research","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal co-IP/MS, multiple orthogonal rescue experiments (BCL-2, IP3R inhibition, MCU inhibition), in vivo conditional KO with defined phenotype, single lab with multiple complementary methods","pmids":["37750320"],"is_preprint":false},{"year":2018,"finding":"TMEM215 encodes a two-pass transmembrane protein localized to endothelial cells (colocalized with EC markers in retina, liver, and tumor vasculature). Knockdown of TMEM215 in ECs induces strong apoptotic cell death without affecting proliferation or migration, impairs lumen formation and sprouting in vitro, and delays/disrupts retinal vascular development in vivo (intravitreous siRNA injection), establishing TMEM215 as required for EC survival during angiogenesis.","method":"5'-RACE to characterize transcripts; immunofluorescence co-localization with EC markers; siRNA knockdown in ECs; cell viability, proliferation, and migration assays; in vitro lumen formation/sprouting assays; intravitreous siRNA injection in mice with retinal vascular phenotyping","journal":"Journal of cellular physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean siRNA KD with defined apoptotic phenotype plus in vivo validation; single lab, multiple methods but no binding-partner identification in this paper","pmids":["30370660"],"is_preprint":false},{"year":2023,"finding":"TMEM215 expression in endothelial cells is induced by physiological laminar shear stress via downregulation of EZH2 (a histone methyltransferase). EC-specific conditional Tmem215 knockout mice show impaired retinal vessel regression (reduced vessel density, increased empty basement membrane sleeves, increased EC apoptosis), demonstrating TMEM215 protects ECs from apoptosis during vessel pruning downstream of shear-stress/EZH2 signaling.","method":"Laminar shear stress application to ECs; EZH2 inhibition/knockdown; conditional EC-specific Tmem215 knockout mouse; retinal flatmount analyses with quantification of vascular density, empty sleeves, and apoptotic ECs","journal":"Circulation research","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo conditional KO with well-defined phenotypic readouts plus upstream pathway (shear stress→EZH2→TMEM215) established in the same study with multiple methods","pmids":["37750320"],"is_preprint":false},{"year":2026,"finding":"NET-DNA (from neutrophil extracellular traps) independently upregulates TMEM215, which then facilitates formation of a Ca2+-dependent ANXA2-TMEM215 complex at ER-mitochondria contact sites, enhancing PINK1/Parkin-mediated mitophagy. Proteomic analysis identifies BiP as a TMEM215-interacting partner, and NET-DNA promotes assembly of a TMEM215-ANXA2-BiP ternary complex. Silencing TMEM215 disrupts mitophagy, impairs mitochondrial Ca2+ handling, reduces ER-mitochondria contacts, and restores anoikis sensitivity in endometrial stromal cells.","method":"Co-immunoprecipitation; proteomic analysis (IP-MS) to identify TMEM215 interactors (ANXA2, BiP); siRNA knockdown of TMEM215 and ANXA2 in primary human EESCs; mitophagy assays (PINK1/Parkin); mitochondrial membrane potential and ROS measurements; ER-mitochondria contact quantification; mouse endometriosis model with TMEM215 knockdown","journal":"Advanced science","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — reciprocal Co-IP/proteomics with in vivo mouse model validation; single lab, single study, no independent replication yet","pmids":["42037208"],"is_preprint":false},{"year":2011,"finding":"Peptide pull-down and binding assays identified a putative interaction between the C-terminus of TMEM215 and PDZ domains of the scaffold proteins MAGI1 and/or SCRIB, though the predictor used had a high false-positive rate and measured affinities did not correlate with prediction scores; the interaction was identified as a 'novel putative interaction' without definitive validation.","method":"PDZ domain microarray binding assay; peptide binding experiments with purified PDZ domains","journal":"PloS one","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single peptide binding assay in a high-FPR context; authors explicitly note the predictor's limitations and describe these as 'putative' interactions","pmids":["22069443"],"is_preprint":false}],"current_model":"TMEM215 is an ER-resident 2-pass transmembrane protein that protects endothelial cells from apoptosis during vessel pruning by binding the chaperone BiP and restraining BIK-mediated ER-to-mitochondrial Ca2+ transfer through mitochondria-associated ER membranes (MAMs); its expression is induced by laminar shear stress via EZH2 downregulation, and it additionally participates in a Ca2+-dependent ANXA2-TMEM215-BiP complex that promotes PINK1/Parkin-mediated mitophagy and anoikis resistance."},"narrative":{"mechanistic_narrative":"TMEM215 is an endoplasmic reticulum-resident two-pass transmembrane protein required for endothelial cell survival during angiogenesis and vascular remodeling [PMID:30370660, PMID:37750320]. It binds the ER chaperone BiP (GRP78) and bridges BiP to the BH3-only proapoptotic protein BIK, thereby restraining ER-to-mitochondrial Ca2+ transfer: loss of TMEM215 expands mitochondria-associated ER membrane (MAM) contacts and drives mitochondrial Ca2+ influx, with the resulting apoptosis blocked by IP3R or MCU inhibition, placing TMEM215 upstream of BIK-triggered Ca2+ flux and cell death [PMID:37750320]. In endothelial cells its expression is induced by physiological laminar shear stress through downregulation of the histone methyltransferase EZH2, and EC-specific deletion impairs retinal vessel regression with increased EC apoptosis, linking TMEM215 to shear-stress-controlled protection of cells during vessel pruning [PMID:37750320]. Beyond the vasculature, TMEM215 nucleates a Ca2+-dependent ANXA2-TMEM215-BiP complex at ER-mitochondria contact sites that promotes PINK1/Parkin-mediated mitophagy and anoikis resistance in endometrial stromal cells [PMID:42037208].","teleology":[{"year":2011,"claim":"An initial proteomic screen asked whether TMEM215 engages PDZ-scaffold proteins, offering the first candidate interaction partners before any cellular role was known.","evidence":"PDZ domain microarray and peptide binding assays with MAGI1/SCRIB PDZ domains","pmids":["22069443"],"confidence":"Low","gaps":["Single peptide binding assay in a high-false-positive-rate context, explicitly described as putative","No cellular or functional validation of MAGI1/SCRIB binding","Interaction never reconnected to the later ER/apoptosis biology"]},{"year":2018,"claim":"The first functional study established that TMEM215 is an endothelial two-pass transmembrane protein essential for EC survival, defining its phenotype before its molecular mechanism.","evidence":"5'-RACE, IF co-localization with EC markers, siRNA knockdown with viability/sprouting assays, and intravitreous siRNA in mouse retina","pmids":["30370660"],"confidence":"Medium","gaps":["No binding partners identified in this study","Subcellular ER localization not yet established","Molecular cause of apoptosis upon knockdown unknown"]},{"year":2023,"claim":"Two coordinated studies resolved the molecular mechanism — ER localization, BiP/BIK binding, control of MAM Ca2+ flux — and placed TMEM215 downstream of shear-stress/EZH2 signaling in vessel pruning.","evidence":"IP-MS for partners, siRNA with BCL-2/IP3R/MCU rescue, EM MAM quantification, shear stress and EZH2 manipulation, and EC-specific conditional knockout mice with retinal phenotyping","pmids":["37750320"],"confidence":"High","gaps":["Structural basis of the TMEM215-BiP-BIK assembly not defined","How TMEM215 mechanically limits MAM contacts is unresolved","Whether EZH2 acts directly on the TMEM215 locus not shown"]},{"year":2026,"claim":"A study in endometrial stromal cells extended TMEM215 function beyond endothelium, showing it assembles a Ca2+-dependent ANXA2-TMEM215-BiP complex that drives mitophagy and anoikis resistance.","evidence":"Co-IP and IP-MS for ANXA2/BiP, siRNA knockdown, PINK1/Parkin mitophagy and ER-mitochondria contact assays, and a mouse endometriosis model","pmids":["42037208"],"confidence":"Medium","gaps":["Single lab, single study without independent replication","Mechanistic relationship between apoptosis-restraining and mitophagy-promoting roles unclear","Direct ANXA2-TMEM215 binding interface not mapped"]},{"year":null,"claim":"How TMEM215 physically governs ER-mitochondria contact architecture and reconciles its dual roles in suppressing apoptosis versus promoting mitophagy across cell types remains unresolved.","evidence":"","pmids":[],"confidence":"High","gaps":["No structural model of TMEM215 or its complexes","Mechanism coupling BiP binding to MAM Ca2+ flux not defined","Generality of the ANXA2 complex beyond endometrial cells untested"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060089","term_label":"molecular transducer activity","supporting_discovery_ids":[0,3]}],"localization":[{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[0,1]}],"pathway":[{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[0,1,2]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[3]}],"complexes":["ANXA2-TMEM215-BiP complex"],"partners":["HSPA5","BIK","ANXA2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q68D42","full_name":"Transmembrane protein 215","aliases":[],"length_aa":235,"mass_kda":25.8,"function":"","subcellular_location":"Membrane","url":"https://www.uniprot.org/uniprotkb/Q68D42/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/TMEM215","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/TMEM215","total_profiled":1310},"omim":[],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"},{"location":"Vesicles","reliability":"Approved"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"retina","ntpm":16.9}],"url":"https://www.proteinatlas.org/search/TMEM215"},"hgnc":{"alias_symbol":[],"prev_symbol":[]},"alphafold":{"accession":"Q68D42","domains":[{"cath_id":"1.10.287","chopping":"9-64","consensus_level":"medium","plddt":70.2868,"start":9,"end":64}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q68D42","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q68D42-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q68D42-F1-predicted_aligned_error_v6.png","plddt_mean":52.97},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=TMEM215","jax_strain_url":"https://www.jax.org/strain/search?query=TMEM215"},"sequence":{"accession":"Q68D42","fasta_url":"https://rest.uniprot.org/uniprotkb/Q68D42.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q68D42/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q68D42"}},"corpus_meta":[{"pmid":"22069443","id":"PMC_22069443","title":"Putting into practice domain-linear motif interaction predictions for exploration of protein networks.","date":"2011","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/22069443","citation_count":34,"is_preprint":false},{"pmid":"37750320","id":"PMC_37750320","title":"TMEM215 Prevents Endothelial Cell Apoptosis in Vessel Regression by Blunting BIK-Regulated ER-to-Mitochondrial Ca Influx.","date":"2023","source":"Circulation research","url":"https://pubmed.ncbi.nlm.nih.gov/37750320","citation_count":27,"is_preprint":false},{"pmid":"28199486","id":"PMC_28199486","title":"Gsg1, Trnp1, and Tmem215 Mark Subpopulations of Bipolar Interneurons in the Mouse Retina.","date":"2017","source":"Investigative ophthalmology & visual science","url":"https://pubmed.ncbi.nlm.nih.gov/28199486","citation_count":15,"is_preprint":false},{"pmid":"30370660","id":"PMC_30370660","title":"Transmembrane protein 215 promotes angiogenesis by maintaining endothelial cell survival.","date":"2018","source":"Journal of cellular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/30370660","citation_count":13,"is_preprint":false},{"pmid":"38631315","id":"PMC_38631315","title":"Hypothalamic GABAergic Neurons Expressing Cellular Retinoic Acid Binding Protein 1 (CRABP1) Are Sensitive to Metabolic Status and Liraglutide in Male Mice.","date":"2024","source":"Neuroendocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/38631315","citation_count":9,"is_preprint":false},{"pmid":"27155051","id":"PMC_27155051","title":"Fine mapping under linkage peaks for symptomatic or asymptomatic outcomes of Leishmania infantum infection in Brazil.","date":"2016","source":"Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases","url":"https://pubmed.ncbi.nlm.nih.gov/27155051","citation_count":6,"is_preprint":false},{"pmid":"40001597","id":"PMC_40001597","title":"Data-Driven Identification of Early Cancer-Associated Genes via Penalized Trans-Dimensional Hidden Markov Models.","date":"2025","source":"Biomolecules","url":"https://pubmed.ncbi.nlm.nih.gov/40001597","citation_count":1,"is_preprint":false},{"pmid":"42037208","id":"PMC_42037208","title":"NET-DNA Activates the ANXA2/TMEM215/BiP Axis to Promote Mitophagy-Mediated Anoikis Resistance in Endometriosis.","date":"2026","source":"Advanced science (Weinheim, Baden-Wurttemberg, Germany)","url":"https://pubmed.ncbi.nlm.nih.gov/42037208","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":6628,"output_tokens":1769,"usd":0.02321,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":8621,"output_tokens":2020,"usd":0.046802,"stage2_stop_reason":"end_turn"},"total_usd":0.070012,"stage1_batch_id":"msgbatch_017qqVz33Ga63SCDwzb35XPb","stage2_batch_id":"msgbatch_01Scr2Ei9x4HJMiRGxwrmvLK","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2023,\n      \"finding\": \"TMEM215 is an endoplasmic reticulum-located 2-pass transmembrane protein that binds the chaperone BiP (GRP78) and facilitates the interaction of BiP with the BH3-only proapoptotic protein BIK. TMEM215 knockdown increases mitochondria-associated ER membrane (MAM) contacts and mitochondrial calcium influx; blocking IP3R or MCU (mitochondrial calcium uniporter) abrogates TMEM215-knockdown-induced apoptosis, placing TMEM215 upstream of BIK-triggered ER-to-mitochondrial Ca2+ influx and apoptosis.\",\n      \"method\": \"Immunoprecipitation-mass spectrometry to identify binding partners (BiP, BIK); siRNA knockdown of TMEM215 in HUVECs; rescue with BCL-2 overexpression; IP3R and MCU inhibition; EM quantification of MAM contacts; conditional EC-specific knockout mouse; retinal vasculature regression assay\",\n      \"journal\": \"Circulation research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal co-IP/MS, multiple orthogonal rescue experiments (BCL-2, IP3R inhibition, MCU inhibition), in vivo conditional KO with defined phenotype, single lab with multiple complementary methods\",\n      \"pmids\": [\"37750320\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TMEM215 encodes a two-pass transmembrane protein localized to endothelial cells (colocalized with EC markers in retina, liver, and tumor vasculature). Knockdown of TMEM215 in ECs induces strong apoptotic cell death without affecting proliferation or migration, impairs lumen formation and sprouting in vitro, and delays/disrupts retinal vascular development in vivo (intravitreous siRNA injection), establishing TMEM215 as required for EC survival during angiogenesis.\",\n      \"method\": \"5'-RACE to characterize transcripts; immunofluorescence co-localization with EC markers; siRNA knockdown in ECs; cell viability, proliferation, and migration assays; in vitro lumen formation/sprouting assays; intravitreous siRNA injection in mice with retinal vascular phenotyping\",\n      \"journal\": \"Journal of cellular physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean siRNA KD with defined apoptotic phenotype plus in vivo validation; single lab, multiple methods but no binding-partner identification in this paper\",\n      \"pmids\": [\"30370660\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"TMEM215 expression in endothelial cells is induced by physiological laminar shear stress via downregulation of EZH2 (a histone methyltransferase). EC-specific conditional Tmem215 knockout mice show impaired retinal vessel regression (reduced vessel density, increased empty basement membrane sleeves, increased EC apoptosis), demonstrating TMEM215 protects ECs from apoptosis during vessel pruning downstream of shear-stress/EZH2 signaling.\",\n      \"method\": \"Laminar shear stress application to ECs; EZH2 inhibition/knockdown; conditional EC-specific Tmem215 knockout mouse; retinal flatmount analyses with quantification of vascular density, empty sleeves, and apoptotic ECs\",\n      \"journal\": \"Circulation research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo conditional KO with well-defined phenotypic readouts plus upstream pathway (shear stress→EZH2→TMEM215) established in the same study with multiple methods\",\n      \"pmids\": [\"37750320\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"NET-DNA (from neutrophil extracellular traps) independently upregulates TMEM215, which then facilitates formation of a Ca2+-dependent ANXA2-TMEM215 complex at ER-mitochondria contact sites, enhancing PINK1/Parkin-mediated mitophagy. Proteomic analysis identifies BiP as a TMEM215-interacting partner, and NET-DNA promotes assembly of a TMEM215-ANXA2-BiP ternary complex. Silencing TMEM215 disrupts mitophagy, impairs mitochondrial Ca2+ handling, reduces ER-mitochondria contacts, and restores anoikis sensitivity in endometrial stromal cells.\",\n      \"method\": \"Co-immunoprecipitation; proteomic analysis (IP-MS) to identify TMEM215 interactors (ANXA2, BiP); siRNA knockdown of TMEM215 and ANXA2 in primary human EESCs; mitophagy assays (PINK1/Parkin); mitochondrial membrane potential and ROS measurements; ER-mitochondria contact quantification; mouse endometriosis model with TMEM215 knockdown\",\n      \"journal\": \"Advanced science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — reciprocal Co-IP/proteomics with in vivo mouse model validation; single lab, single study, no independent replication yet\",\n      \"pmids\": [\"42037208\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Peptide pull-down and binding assays identified a putative interaction between the C-terminus of TMEM215 and PDZ domains of the scaffold proteins MAGI1 and/or SCRIB, though the predictor used had a high false-positive rate and measured affinities did not correlate with prediction scores; the interaction was identified as a 'novel putative interaction' without definitive validation.\",\n      \"method\": \"PDZ domain microarray binding assay; peptide binding experiments with purified PDZ domains\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single peptide binding assay in a high-FPR context; authors explicitly note the predictor's limitations and describe these as 'putative' interactions\",\n      \"pmids\": [\"22069443\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"TMEM215 is an ER-resident 2-pass transmembrane protein that protects endothelial cells from apoptosis during vessel pruning by binding the chaperone BiP and restraining BIK-mediated ER-to-mitochondrial Ca2+ transfer through mitochondria-associated ER membranes (MAMs); its expression is induced by laminar shear stress via EZH2 downregulation, and it additionally participates in a Ca2+-dependent ANXA2-TMEM215-BiP complex that promotes PINK1/Parkin-mediated mitophagy and anoikis resistance.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"TMEM215 is an endoplasmic reticulum-resident two-pass transmembrane protein required for endothelial cell survival during angiogenesis and vascular remodeling [#1, #2]. It binds the ER chaperone BiP (GRP78) and bridges BiP to the BH3-only proapoptotic protein BIK, thereby restraining ER-to-mitochondrial Ca2+ transfer: loss of TMEM215 expands mitochondria-associated ER membrane (MAM) contacts and drives mitochondrial Ca2+ influx, with the resulting apoptosis blocked by IP3R or MCU inhibition, placing TMEM215 upstream of BIK-triggered Ca2+ flux and cell death [#0]. In endothelial cells its expression is induced by physiological laminar shear stress through downregulation of the histone methyltransferase EZH2, and EC-specific deletion impairs retinal vessel regression with increased EC apoptosis, linking TMEM215 to shear-stress-controlled protection of cells during vessel pruning [#2]. Beyond the vasculature, TMEM215 nucleates a Ca2+-dependent ANXA2-TMEM215-BiP complex at ER-mitochondria contact sites that promotes PINK1/Parkin-mediated mitophagy and anoikis resistance in endometrial stromal cells [#3].\",\n  \"teleology\": [\n    {\n      \"year\": 2011,\n      \"claim\": \"An initial proteomic screen asked whether TMEM215 engages PDZ-scaffold proteins, offering the first candidate interaction partners before any cellular role was known.\",\n      \"evidence\": \"PDZ domain microarray and peptide binding assays with MAGI1/SCRIB PDZ domains\",\n      \"pmids\": [\"22069443\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Single peptide binding assay in a high-false-positive-rate context, explicitly described as putative\", \"No cellular or functional validation of MAGI1/SCRIB binding\", \"Interaction never reconnected to the later ER/apoptosis biology\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"The first functional study established that TMEM215 is an endothelial two-pass transmembrane protein essential for EC survival, defining its phenotype before its molecular mechanism.\",\n      \"evidence\": \"5'-RACE, IF co-localization with EC markers, siRNA knockdown with viability/sprouting assays, and intravitreous siRNA in mouse retina\",\n      \"pmids\": [\"30370660\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No binding partners identified in this study\", \"Subcellular ER localization not yet established\", \"Molecular cause of apoptosis upon knockdown unknown\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Two coordinated studies resolved the molecular mechanism — ER localization, BiP/BIK binding, control of MAM Ca2+ flux — and placed TMEM215 downstream of shear-stress/EZH2 signaling in vessel pruning.\",\n      \"evidence\": \"IP-MS for partners, siRNA with BCL-2/IP3R/MCU rescue, EM MAM quantification, shear stress and EZH2 manipulation, and EC-specific conditional knockout mice with retinal phenotyping\",\n      \"pmids\": [\"37750320\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of the TMEM215-BiP-BIK assembly not defined\", \"How TMEM215 mechanically limits MAM contacts is unresolved\", \"Whether EZH2 acts directly on the TMEM215 locus not shown\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"A study in endometrial stromal cells extended TMEM215 function beyond endothelium, showing it assembles a Ca2+-dependent ANXA2-TMEM215-BiP complex that drives mitophagy and anoikis resistance.\",\n      \"evidence\": \"Co-IP and IP-MS for ANXA2/BiP, siRNA knockdown, PINK1/Parkin mitophagy and ER-mitochondria contact assays, and a mouse endometriosis model\",\n      \"pmids\": [\"42037208\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab, single study without independent replication\", \"Mechanistic relationship between apoptosis-restraining and mitophagy-promoting roles unclear\", \"Direct ANXA2-TMEM215 binding interface not mapped\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How TMEM215 physically governs ER-mitochondria contact architecture and reconciles its dual roles in suppressing apoptosis versus promoting mitophagy across cell types remains unresolved.\",\n      \"evidence\": null,\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No structural model of TMEM215 or its complexes\", \"Mechanism coupling BiP binding to MAM Ca2+ flux not defined\", \"Generality of the ANXA2 complex beyond endometrial cells untested\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060089\", \"supporting_discovery_ids\": [0, 3]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [0, 1, 2]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [3]}\n    ],\n    \"complexes\": [\"ANXA2-TMEM215-BiP complex\"],\n    \"partners\": [\"HSPA5\", \"BIK\", \"ANXA2\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"faith_supported":4,"faith_total":4,"faith_pct":100.0}}