{"gene":"TRIM17","run_date":"2026-04-28T21:43:00","timeline":{"discoveries":[{"year":2010,"finding":"TRIM17 is a novel E3 ubiquitin ligase whose RING domain confers E3 activity that is both necessary and sufficient for initiating neuronal apoptosis via the intrinsic (Bax-dependent) pathway; its pro-apoptotic effect is abolished in Bax-/- neurons and by dominant-negative RING mutants.","method":"Overexpression/knockdown in primary cerebellar granule neurons (CGN) and sympathetic neurons, dominant-negative RING mutants, Bax-/- genetic rescue","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (KD, OE, DN mutants, Bax-/- epistasis) with defined cellular phenotype","pmids":["20559321"],"is_preprint":false},{"year":2012,"finding":"TRIM17 directly ubiquitinates Mcl-1 (anti-apoptotic Bcl-2 family member) in a phosphorylation (GSK3)-dependent manner: GSK3-mediated phosphorylation of Mcl-1 is required for its physical interaction with TRIM17, after which TRIM17 promotes K48-linked ubiquitination and proteasomal degradation of Mcl-1 to initiate neuronal apoptosis.","method":"Co-immunoprecipitation of endogenous proteins, in vitro ubiquitination assay, Trim17 knockdown reducing Mcl-1 ubiquitination/degradation, kinase inhibition and phospho-site point mutations blocking Trim17-Mcl-1 interaction","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 1-2 — in vitro ubiquitination assay, reciprocal Co-IP, mutagenesis of phosphorylation sites, KD with defined biochemical readout; single lab but multiple orthogonal methods","pmids":["22976837"],"is_preprint":false},{"year":2011,"finding":"TRIM17 (Terf) interacts with kinetochore protein ZWINT via its coiled-coil domain and promotes proteasomal degradation of ZWINT, negatively regulating cell proliferation.","method":"Yeast two-hybrid screening, immunoprecipitation/western blot, coiled-coil deletion mutants, overexpression causing ZWINT downregulation, siRNA knockdown, stable transfection cell growth assay","journal":"Journal of biochemistry","confidence":"Medium","confidence_rationale":"Tier 2-3 — multiple methods (Y2H, Co-IP, domain mapping, OE/KD with proliferation readout) but single lab","pmids":["22023800"],"is_preprint":false},{"year":2009,"finding":"TRIM17 (Terf) exhibits E3 ubiquitin ligase activity in vitro using UbcH6 as E2 enzyme; it auto-polyubiquitinates and is itself degraded by the proteasome. TRIM44 interacts with TRIM17 and inhibits its auto-ubiquitination, thereby stabilizing TRIM17 protein levels.","method":"In vitro ubiquitination assay with UbcH6, proteasome inhibitor stabilization in cells, co-immunoprecipitation of TRIM17 and TRIM44","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 1-2 — in vitro ubiquitination assay and Co-IP, single lab","pmids":["19358823"],"is_preprint":false},{"year":2018,"finding":"TRIM17 stabilizes BCL2A1 by physically blocking TRIM28 (an E3 ubiquitin ligase for BCL2A1) from binding and ubiquitinating BCL2A1; TRIM28 and BCL2A1 interact at the mitochondria, and TRIM28 knockdown decreases BCL2A1 ubiquitination. Knockout of TRIM17 reduces BCL2A1 protein levels and sensitizes melanoma cells to BRAF-targeted therapy.","method":"Co-immunoprecipitation of endogenous proteins, TRIM17 knockout, TRIM28 knockdown, ubiquitination assays, subcellular fractionation (mitochondria), cell viability assays","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP, KO/KD with biochemical and functional readouts, subcellular localization; single lab with multiple orthogonal methods","pmids":["30042493"],"is_preprint":false},{"year":2014,"finding":"TRIM17 binds preferentially SUMOylated forms of NFATc3 (and NFATc4) but does not ubiquitinate/degrade them; instead, TRIM17 reduces calcium-mediated nuclear translocation of NFATc3/c4 by approximately 2-fold, thereby inhibiting their transcriptional activity. Conversely, NFATc3 (together with c-Jun) directly binds the Trim17 gene promoter and induces Trim17 transcription, establishing a feedback loop.","method":"Co-immunoprecipitation, luciferase transcriptional reporter assays, nuclear/cytoplasmic fractionation, target gene expression measurement, ChIP (NFATc3 binding to Trim17 promoter), overexpression/knockdown in cerebellar granule neurons","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (Co-IP, ChIP, fractionation, reporter assays, KD/OE) with defined molecular and cellular phenotypes; single lab","pmids":["25215946"],"is_preprint":false},{"year":2016,"finding":"TRIM17 promotes selective autophagic removal of midbodies while inhibiting bulk autophagy through stabilization of Mcl-1–Beclin-1 complexes; selective loss of Mcl-1 from TRIM17-Beclin-1 complexes at midbodies correlates with TRIM17's ability to promote midbody degradation.","method":"Biochemical co-immunoprecipitation, autophagy flux assays, midbody localization imaging, overexpression/knockdown in mammalian cells","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP, imaging, OE/KD with defined autophagic phenotype; single lab","pmids":["27562068"],"is_preprint":false},{"year":2018,"finding":"TRIM17 decreases TRIM41-mediated ubiquitination and degradation of the transcription factor ZSCAN21, thereby stabilizing ZSCAN21 and increasing SNCA (α-synuclein) transcription. TRIM41 is an E3 ubiquitin ligase for ZSCAN21, and TRIM17 antagonizes this activity.","method":"Co-immunoprecipitation, ubiquitination assays, TRIM17/TRIM41/ZSCAN21 knockdown with measurement of ZSCAN21 protein and SNCA mRNA levels, mouse MPTP model","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (Co-IP, ubiquitination assay, KD with biochemical and transcriptional readouts, in vivo model); single lab","pmids":["30485814"],"is_preprint":false},{"year":2019,"finding":"TRIM17 expression is controlled by the PI3K/Akt/GSK3 signaling pathway in cerebellar granule neurons; inhibition of this pathway upregulates Trim17 mRNA and protein, and Trim17 protein is expressed in vivo in apoptotic neurons during postnatal cerebellar development.","method":"Pharmacological inhibition of PI3K/Akt/GSK3, immunostaining of apoptotic neurons in vivo, RT-PCR/western blot","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 3 — pharmacological pathway inhibition with expression readout, in vivo localization; single lab","pmids":["20559321"],"is_preprint":false},{"year":2023,"finding":"TRIM17 interacts with BAX and promotes its K48-linked ubiquitination and proteasomal degradation in gastric cancer cells, leading to suppression of BAX-dependent apoptosis and enhanced cancer cell survival.","method":"Co-immunoprecipitation, ubiquitination assays (K48-linkage specific), overexpression/knockdown in AGS and HGC-27 gastric cancer cell lines, apoptosis assays","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP, linkage-specific ubiquitination, KD/OE with apoptosis readout; single lab","pmids":["37697039"],"is_preprint":false},{"year":2023,"finding":"TRIM17 interacts with RBM38 and promotes its K48-linked ubiquitination and proteasomal degradation, thereby attenuating ROS production and DNA damage to drive cisplatin resistance in non-small cell lung cancer cells.","method":"Co-immunoprecipitation, K48-linkage ubiquitination assay, TRIM17 knockdown/overexpression, ROS and DNA damage measurements, in vitro and in vivo cisplatin sensitivity assays","journal":"Cellular oncology","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP, linkage-specific ubiquitination, KD/OE with defined drug resistance phenotype; single lab","pmids":["37219768"],"is_preprint":false},{"year":2025,"finding":"TMEFF2 recruits TRIM17 as the E3 ubiquitin ligase to promote K48-linked ubiquitination and proteasomal degradation of BAX, thereby driving benign prostatic hyperplasia progression; TMEFF2 interacts with BAX and TRIM17 in a ternary complex.","method":"Co-immunoprecipitation, ubiquitination assay (K48-linkage), cycloheximide chase assay, knockdown/overexpression in prostate cell lines and rat BPH model","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP showing ternary complex, K48-linkage ubiquitination, CHX chase, in vivo model; single lab","pmids":["40780616"],"is_preprint":false},{"year":2025,"finding":"TRIM17 ubiquitinates and promotes proteasomal degradation of FTO (an m6A RNA demethylase), which increases N6-methyladenosine modification and stability of PDK1 mRNA, activating the AKT/mTOR signaling pathway to drive osteosarcoma malignancy.","method":"Co-immunoprecipitation, ubiquitination assay, overexpression/knockdown, m6A profiling, AKT/mTOR pathway analysis in osteosarcoma cells","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP, ubiquitination, KD/OE with pathway readout; single lab","pmids":["41145484"],"is_preprint":false},{"year":1998,"finding":"TRIM17 (Terf/RNF16) was molecularly cloned and characterized as a novel RBCC/TRIM protein containing an N-terminal RING finger domain, one B-box, and a middle coiled-coil domain; Northern blot showed near-exclusive expression in testis.","method":"PCR with degenerate primers, cDNA library screening, Northern blot analysis, domain analysis","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 — molecular cloning and domain characterization; foundational identification paper","pmids":["9792805"],"is_preprint":false},{"year":2011,"finding":"PPARγ activation (by DEHP or the PPARγ agonist troglitazone) induces Trim17 protein expression in Neuro-2a neuroblastoma cells, which is associated with caspase-3 cleavage and apoptosis; this induction is blocked by the PPARγ antagonist GW9662.","method":"Chemical activation/inhibition of PPARγ, western blot for Trim17 and cleaved caspase-3, cell viability assays","journal":"Toxicology letters","confidence":"Low","confidence_rationale":"Tier 3 — pharmacological modulation with expression readout only; no direct mechanistic link established","pmids":["21856391"],"is_preprint":false}],"current_model":"TRIM17 is a RING-domain E3 ubiquitin ligase that can both promote substrate ubiquitination and proteasomal degradation (of Mcl-1, ZWINT, BCL2A1 via antagonizing TRIM28, RBM38, BAX, FTO, and ZSCAN21 via antagonizing TRIM41) and paradoxically stabilize other proteins by binding to and inhibiting partner E3 ligases (TRIM28, TRIM41); its pro-apoptotic activity in neurons requires GSK3-mediated phosphorylation of substrates for recognition, is transcriptionally induced by NFATc3/c-Jun, and is regulated upstream by the PI3K/Akt/GSK3 pathway, while also controlling selective autophagy of midbodies through modulation of Mcl-1–Beclin-1 complexes."},"narrative":{"teleology":[{"year":1998,"claim":"Identification of TRIM17 as a novel RBCC/TRIM family member with RING, B-box, and coiled-coil domains established the gene's structural framework and revealed near-exclusive testis expression, posing the question of its enzymatic and biological function.","evidence":"PCR cloning, cDNA library screening, Northern blot in mouse tissues","pmids":["9792805"],"confidence":"Medium","gaps":["No enzymatic activity demonstrated","Function unknown beyond domain architecture","Expression in other tissues not explored at protein level"]},{"year":2009,"claim":"Demonstration that TRIM17 possesses intrinsic E3 ubiquitin ligase activity with UbcH6 as its cognate E2, and that TRIM44 stabilizes TRIM17 by blocking its auto-ubiquitination, established TRIM17 as a bona fide ubiquitin ligase subject to regulation by a partner TRIM protein.","evidence":"In vitro ubiquitination assay, proteasome inhibitor chase, Co-IP of TRIM17–TRIM44","pmids":["19358823"],"confidence":"Medium","gaps":["No physiological substrate identified","Functional consequence of TRIM44-mediated stabilization not tested in vivo"]},{"year":2010,"claim":"Showing that TRIM17 RING domain activity is necessary and sufficient for Bax-dependent neuronal apoptosis, and that TRIM17 is induced by PI3K/Akt/GSK3 pathway inhibition in cerebellar granule neurons, answered the central question of TRIM17's biological role and placed it in a defined signaling axis during developmental cell death.","evidence":"OE/KD in primary CGN and sympathetic neurons, dominant-negative RING mutants, Bax−/− epistasis, pharmacological pathway inhibition, in vivo immunostaining","pmids":["20559321"],"confidence":"High","gaps":["Direct ubiquitination substrate mediating apoptosis not yet identified","Transcriptional regulation mechanism not resolved"]},{"year":2011,"claim":"Identification of ZWINT as a TRIM17 substrate degraded via the coiled-coil domain interaction linked TRIM17 to kinetochore biology and cell proliferation control beyond its neuronal apoptosis role.","evidence":"Yeast two-hybrid, Co-IP, coiled-coil deletion mapping, siRNA KD, proliferation assay","pmids":["22023800"],"confidence":"Medium","gaps":["Ubiquitin chain linkage type on ZWINT not determined","In vivo relevance to cell cycle not shown"]},{"year":2012,"claim":"Identification of Mcl-1 as the direct pro-apoptotic substrate of TRIM17, requiring GSK3-dependent phosphorylation for recognition and K48-linked ubiquitination, resolved how TRIM17 E3 activity connects to the Bax-dependent apoptotic pathway in neurons.","evidence":"Endogenous Co-IP, in vitro ubiquitination, phospho-site mutagenesis blocking interaction, KD reducing Mcl-1 ubiquitination","pmids":["22976837"],"confidence":"High","gaps":["Whether TRIM17 is the sole E3 for Mcl-1 degradation in neurons not resolved","Structural basis of phospho-dependent recognition unknown"]},{"year":2014,"claim":"Discovery that NFATc3/c-Jun directly transcribes TRIM17 while TRIM17 reciprocally inhibits NFATc3 nuclear translocation established a negative feedback loop governing TRIM17 expression during neuronal apoptosis.","evidence":"ChIP on Trim17 promoter, luciferase reporters, nuclear/cytoplasmic fractionation, OE/KD in CGN","pmids":["25215946"],"confidence":"High","gaps":["Mechanism by which TRIM17 retains SUMOylated NFATc3 in cytoplasm unknown","Whether TRIM17 ubiquitinates NFATc3 indirectly not excluded"]},{"year":2016,"claim":"Demonstrating that TRIM17 promotes selective autophagic degradation of midbodies while inhibiting bulk autophagy through Mcl-1–Beclin-1 complex stabilization revealed a non-apoptotic function and explained how TRIM17 coordinates apoptotic and autophagic pathways via a shared Mcl-1 node.","evidence":"Co-IP, autophagy flux assays, midbody imaging, OE/KD in mammalian cells","pmids":["27562068"],"confidence":"Medium","gaps":["Mechanism of selective Mcl-1 loss at midbodies unclear","Whether TRIM17 directly ubiquitinates autophagy components not tested"]},{"year":2018,"claim":"Two studies revealed that TRIM17 can stabilize proteins by inhibiting partner E3 ligases: it blocks TRIM28-mediated ubiquitination of BCL2A1 (relevant to melanoma drug resistance) and TRIM41-mediated ubiquitination of ZSCAN21 (controlling α-synuclein transcription), fundamentally expanding TRIM17's mechanism from substrate-directed E3 to E3 ligase antagonist.","evidence":"Endogenous Co-IP, KO/KD with ubiquitination readouts, subcellular fractionation, melanoma drug sensitivity assays (BCL2A1); Co-IP, ubiquitination assays, SNCA mRNA measurement, MPTP mouse model (ZSCAN21)","pmids":["30042493","30485814"],"confidence":"High","gaps":["Structural basis of TRIM17-mediated E3 inhibition not determined","Whether TRIM17 catalytic activity is required for the inhibitory function not resolved","Relevance of ZSCAN21–SNCA axis to Parkinson's disease pathology not confirmed in human tissue"]},{"year":2023,"claim":"Identification of BAX and RBM38 as direct K48-linked ubiquitination substrates of TRIM17 in gastric cancer and lung cancer cells, respectively, showed that TRIM17 can function as an anti-apoptotic and chemoresistance factor in cancer contexts — inverting its neuronal pro-apoptotic role.","evidence":"K48-linkage-specific ubiquitination assays, Co-IP, OE/KD with apoptosis and drug resistance readouts in cancer cell lines","pmids":["37697039","37219768"],"confidence":"Medium","gaps":["Context-dependent switch between pro- and anti-apoptotic roles mechanistically unexplained","BAX ubiquitination by TRIM17 reported from single labs — independent confirmation lacking"]},{"year":2025,"claim":"Demonstration that TRIM17 ubiquitinates FTO to regulate m6A-dependent mRNA stability and AKT/mTOR signaling in osteosarcoma, and that TMEFF2 recruits TRIM17 to BAX in a ternary complex in prostate tissue, expanded the substrate repertoire and revealed adaptor-mediated substrate recruitment as a regulatory mechanism.","evidence":"Co-IP, ubiquitination assays, m6A profiling, AKT/mTOR readouts (FTO); Co-IP of ternary complex, CHX chase, rat BPH model (BAX/TMEFF2)","pmids":["41145484","40780616"],"confidence":"Medium","gaps":["Generality of adaptor-mediated recruitment to other substrates unknown","FTO as TRIM17 substrate awaits independent replication"]},{"year":null,"claim":"What determines whether TRIM17 acts as a substrate-directed E3 ligase versus an E3 ligase antagonist in different cellular contexts remains unresolved, as does the structural basis for substrate versus partner E3 recognition.","evidence":"","pmids":[],"confidence":"High","gaps":["No structural model of TRIM17 or its complexes available","Context-dependent functional switch mechanism undefined","Physiological role in testis (highest expression tissue) completely uncharacterized"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[0,1,2,3,9,10,11,12]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[4,7]}],"localization":[{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[4]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[6]}],"pathway":[{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[0,1,9]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[1,3,4,7,10,12]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[6]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[5,8]}],"complexes":[],"partners":["MCL1","TRIM28","TRIM41","TRIM44","ZWINT","BAX","ZSCAN21","FTO"],"other_free_text":[]},"mechanistic_narrative":"TRIM17 is a RING-domain E3 ubiquitin ligase that functions as a dual regulator of protein stability — directly ubiquitinating substrates for proteasomal degradation and inhibiting partner E3 ligases to stabilize specific targets. TRIM17 promotes K48-linked ubiquitination and degradation of the anti-apoptotic protein Mcl-1 in a GSK3 phosphorylation-dependent manner, triggering Bax-dependent neuronal apoptosis, and also targets ZWINT, RBM38, BAX, and FTO for proteasomal degradation in various cellular contexts [PMID:22976837, PMID:22023800, PMID:37219768, PMID:37697039, PMID:41145484]. Paradoxically, TRIM17 stabilizes BCL2A1 and ZSCAN21 by physically blocking the E3 ligases TRIM28 and TRIM41, respectively, from ubiquitinating these substrates, thereby modulating melanoma drug resistance and α-synuclein transcription [PMID:30042493, PMID:30485814]. TRIM17 also regulates selective autophagy of midbodies through modulation of Mcl-1–Beclin-1 complexes, and its expression is transcriptionally induced by NFATc3/c-Jun in a feedback loop and regulated upstream by the PI3K/Akt/GSK3 pathway during developmental neuronal apoptosis [PMID:27562068, PMID:25215946, PMID:20559321]."},"prefetch_data":{"uniprot":{"accession":"Q9Y577","full_name":"E3 ubiquitin-protein ligase TRIM17","aliases":["RING finger protein 16","RING-type E3 ubiquitin transferase TRIM17","Testis RING finger protein","Tripartite motif-containing protein 17"],"length_aa":477,"mass_kda":54.4,"function":"E3 ubiquitin ligase that plays important roles in the regulation of neuronal apoptosis, selective autophagy or cell proliferation (PubMed:19358823, PubMed:22023800, PubMed:27562068). Stimulates the degradation of kinetochore ZW10 interacting protein ZWINT in a proteasome-dependent manner, leading to negative regulation of cell proliferation (PubMed:22023800). Inhibits autophagic degradation of diverse known targets while contributing to autophagy of midbodies. Autophagy-inhibitory activity involves MCL1, which TRIM17 assembles into complexes with the key autophagy regulator BECN1 (PubMed:27562068). Controls neuronal apoptosis by mediating ubiquitination and degradation of MCL1 to initiate neuronal death. In addition, regulates NFAT transcription factors NFATC3 and NFATC4 activities by preventing their nuclear localization, thus inhibiting their transcriptional activities. Decreases TRIM41-mediated degradation of ZSCAN2 thereby stimulating alpha-synuclein/SNCA transcription in neuronal cells (By similarity). Prevents the E3 ubiquitin-ligase activity of TRIM28 and its interaction with anti-apoptotic BCL2A1, blocking TRIM28 from ubiquitinating BCL2A1 (PubMed:19358823)","subcellular_location":"Cytoplasm; Lysosome","url":"https://www.uniprot.org/uniprotkb/Q9Y577/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/TRIM17","classification":"Not Classified","n_dependent_lines":14,"n_total_lines":1208,"dependency_fraction":0.011589403973509934},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/TRIM17","total_profiled":1310},"omim":[],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Vesicles","reliability":"Approved"}],"tissue_specificity":"Group enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":45.2},{"tissue":"testis","ntpm":39.3}],"url":"https://www.proteinatlas.org/search/TRIM17"},"hgnc":{"alias_symbol":["terf","RBCC"],"prev_symbol":["RNF16"]},"alphafold":{"accession":"Q9Y577","domains":[{"cath_id":"3.30.40.10","chopping":"2-48_57-94","consensus_level":"medium","plddt":83.8636,"start":2,"end":94},{"cath_id":"2.60.120.920","chopping":"287-322_332-397_408-476","consensus_level":"high","plddt":86.5259,"start":287,"end":476}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y577","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y577-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y577-F1-predicted_aligned_error_v6.png","plddt_mean":85.75},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=TRIM17","jax_strain_url":"https://www.jax.org/strain/search?query=TRIM17"},"sequence":{"accession":"Q9Y577","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9Y577.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9Y577/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y577"}},"corpus_meta":[{"pmid":"16237670","id":"PMC_16237670","title":"TRIM/RBCC, a novel class of 'single protein RING finger' E3 ubiquitin ligases.","date":"2005","source":"BioEssays : news and reviews in molecular, cellular and developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/16237670","citation_count":603,"is_preprint":false},{"pmid":"10882102","id":"PMC_10882102","title":"The lin-41 RBCC gene acts in the C. elegans heterochronic pathway between the let-7 regulatory RNA and the LIN-29 transcription factor.","date":"2000","source":"Molecular cell","url":"https://pubmed.ncbi.nlm.nih.gov/10882102","citation_count":584,"is_preprint":false},{"pmid":"11704850","id":"PMC_11704850","title":"PML protein isoforms and the RBCC/TRIM motif.","date":"2001","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/11704850","citation_count":381,"is_preprint":false},{"pmid":"16434393","id":"PMC_16434393","title":"Subclassification of the RBCC/TRIM superfamily reveals a novel motif necessary for microtubule binding.","date":"2006","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/16434393","citation_count":270,"is_preprint":false},{"pmid":"11867753","id":"PMC_11867753","title":"An RBCC protein implicated in maintenance of steady-state neuregulin receptor levels.","date":"2002","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/11867753","citation_count":105,"is_preprint":false},{"pmid":"17314412","id":"PMC_17314412","title":"The RBCC gene RFP2 (Leu5) encodes a novel transmembrane E3 ubiquitin ligase involved in ERAD.","date":"2007","source":"Molecular biology of the cell","url":"https://pubmed.ncbi.nlm.nih.gov/17314412","citation_count":96,"is_preprint":false},{"pmid":"16529770","id":"PMC_16529770","title":"Solution structure of the RBCC/TRIM B-box1 domain of human MID1: B-box with a RING.","date":"2006","source":"Journal of molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/16529770","citation_count":92,"is_preprint":false},{"pmid":"12878161","id":"PMC_12878161","title":"BTBD1 and BTBD2 colocalize to cytoplasmic bodies with the RBCC/tripartite motif protein, TRIM5delta.","date":"2003","source":"Experimental cell research","url":"https://pubmed.ncbi.nlm.nih.gov/12878161","citation_count":89,"is_preprint":false},{"pmid":"22976837","id":"PMC_22976837","title":"Trim17-mediated ubiquitination and degradation of Mcl-1 initiate apoptosis in neurons.","date":"2012","source":"Cell death and differentiation","url":"https://pubmed.ncbi.nlm.nih.gov/22976837","citation_count":77,"is_preprint":false},{"pmid":"12096914","id":"PMC_12096914","title":"Hetero-oligomerization among the TIF family of RBCC/TRIM domain-containing nuclear cofactors: a potential mechanism for regulating the switch between coactivation and corepression.","date":"2002","source":"Journal of molecular 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neurons, dominant-negative RING mutants, Bax-/- genetic rescue\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (KD, OE, DN mutants, Bax-/- epistasis) with defined cellular phenotype\",\n      \"pmids\": [\"20559321\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"TRIM17 directly ubiquitinates Mcl-1 (anti-apoptotic Bcl-2 family member) in a phosphorylation (GSK3)-dependent manner: GSK3-mediated phosphorylation of Mcl-1 is required for its physical interaction with TRIM17, after which TRIM17 promotes K48-linked ubiquitination and proteasomal degradation of Mcl-1 to initiate neuronal apoptosis.\",\n      \"method\": \"Co-immunoprecipitation of endogenous proteins, in vitro ubiquitination assay, Trim17 knockdown reducing Mcl-1 ubiquitination/degradation, kinase inhibition and phospho-site point mutations blocking Trim17-Mcl-1 interaction\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — in vitro ubiquitination assay, reciprocal Co-IP, mutagenesis of phosphorylation sites, KD with defined biochemical readout; single lab but multiple orthogonal methods\",\n      \"pmids\": [\"22976837\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"TRIM17 (Terf) interacts with kinetochore protein ZWINT via its coiled-coil domain and promotes proteasomal degradation of ZWINT, negatively regulating cell proliferation.\",\n      \"method\": \"Yeast two-hybrid screening, immunoprecipitation/western blot, coiled-coil deletion mutants, overexpression causing ZWINT downregulation, siRNA knockdown, stable transfection cell growth assay\",\n      \"journal\": \"Journal of biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — multiple methods (Y2H, Co-IP, domain mapping, OE/KD with proliferation readout) but single lab\",\n      \"pmids\": [\"22023800\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"TRIM17 (Terf) exhibits E3 ubiquitin ligase activity in vitro using UbcH6 as E2 enzyme; it auto-polyubiquitinates and is itself degraded by the proteasome. TRIM44 interacts with TRIM17 and inhibits its auto-ubiquitination, thereby stabilizing TRIM17 protein levels.\",\n      \"method\": \"In vitro ubiquitination assay with UbcH6, proteasome inhibitor stabilization in cells, co-immunoprecipitation of TRIM17 and TRIM44\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 — in vitro ubiquitination assay and Co-IP, single lab\",\n      \"pmids\": [\"19358823\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TRIM17 stabilizes BCL2A1 by physically blocking TRIM28 (an E3 ubiquitin ligase for BCL2A1) from binding and ubiquitinating BCL2A1; TRIM28 and BCL2A1 interact at the mitochondria, and TRIM28 knockdown decreases BCL2A1 ubiquitination. Knockout of TRIM17 reduces BCL2A1 protein levels and sensitizes melanoma cells to BRAF-targeted therapy.\",\n      \"method\": \"Co-immunoprecipitation of endogenous proteins, TRIM17 knockout, TRIM28 knockdown, ubiquitination assays, subcellular fractionation (mitochondria), cell viability assays\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, KO/KD with biochemical and functional readouts, subcellular localization; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"30042493\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"TRIM17 binds preferentially SUMOylated forms of NFATc3 (and NFATc4) but does not ubiquitinate/degrade them; instead, TRIM17 reduces calcium-mediated nuclear translocation of NFATc3/c4 by approximately 2-fold, thereby inhibiting their transcriptional activity. Conversely, NFATc3 (together with c-Jun) directly binds the Trim17 gene promoter and induces Trim17 transcription, establishing a feedback loop.\",\n      \"method\": \"Co-immunoprecipitation, luciferase transcriptional reporter assays, nuclear/cytoplasmic fractionation, target gene expression measurement, ChIP (NFATc3 binding to Trim17 promoter), overexpression/knockdown in cerebellar granule neurons\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (Co-IP, ChIP, fractionation, reporter assays, KD/OE) with defined molecular and cellular phenotypes; single lab\",\n      \"pmids\": [\"25215946\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"TRIM17 promotes selective autophagic removal of midbodies while inhibiting bulk autophagy through stabilization of Mcl-1–Beclin-1 complexes; selective loss of Mcl-1 from TRIM17-Beclin-1 complexes at midbodies correlates with TRIM17's ability to promote midbody degradation.\",\n      \"method\": \"Biochemical co-immunoprecipitation, autophagy flux assays, midbody localization imaging, overexpression/knockdown in mammalian cells\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP, imaging, OE/KD with defined autophagic phenotype; single lab\",\n      \"pmids\": [\"27562068\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TRIM17 decreases TRIM41-mediated ubiquitination and degradation of the transcription factor ZSCAN21, thereby stabilizing ZSCAN21 and increasing SNCA (α-synuclein) transcription. TRIM41 is an E3 ubiquitin ligase for ZSCAN21, and TRIM17 antagonizes this activity.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assays, TRIM17/TRIM41/ZSCAN21 knockdown with measurement of ZSCAN21 protein and SNCA mRNA levels, mouse MPTP model\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (Co-IP, ubiquitination assay, KD with biochemical and transcriptional readouts, in vivo model); single lab\",\n      \"pmids\": [\"30485814\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"TRIM17 expression is controlled by the PI3K/Akt/GSK3 signaling pathway in cerebellar granule neurons; inhibition of this pathway upregulates Trim17 mRNA and protein, and Trim17 protein is expressed in vivo in apoptotic neurons during postnatal cerebellar development.\",\n      \"method\": \"Pharmacological inhibition of PI3K/Akt/GSK3, immunostaining of apoptotic neurons in vivo, RT-PCR/western blot\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — pharmacological pathway inhibition with expression readout, in vivo localization; single lab\",\n      \"pmids\": [\"20559321\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"TRIM17 interacts with BAX and promotes its K48-linked ubiquitination and proteasomal degradation in gastric cancer cells, leading to suppression of BAX-dependent apoptosis and enhanced cancer cell survival.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assays (K48-linkage specific), overexpression/knockdown in AGS and HGC-27 gastric cancer cell lines, apoptosis assays\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP, linkage-specific ubiquitination, KD/OE with apoptosis readout; single lab\",\n      \"pmids\": [\"37697039\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"TRIM17 interacts with RBM38 and promotes its K48-linked ubiquitination and proteasomal degradation, thereby attenuating ROS production and DNA damage to drive cisplatin resistance in non-small cell lung cancer cells.\",\n      \"method\": \"Co-immunoprecipitation, K48-linkage ubiquitination assay, TRIM17 knockdown/overexpression, ROS and DNA damage measurements, in vitro and in vivo cisplatin sensitivity assays\",\n      \"journal\": \"Cellular oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP, linkage-specific ubiquitination, KD/OE with defined drug resistance phenotype; single lab\",\n      \"pmids\": [\"37219768\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"TMEFF2 recruits TRIM17 as the E3 ubiquitin ligase to promote K48-linked ubiquitination and proteasomal degradation of BAX, thereby driving benign prostatic hyperplasia progression; TMEFF2 interacts with BAX and TRIM17 in a ternary complex.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay (K48-linkage), cycloheximide chase assay, knockdown/overexpression in prostate cell lines and rat BPH model\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP showing ternary complex, K48-linkage ubiquitination, CHX chase, in vivo model; single lab\",\n      \"pmids\": [\"40780616\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"TRIM17 ubiquitinates and promotes proteasomal degradation of FTO (an m6A RNA demethylase), which increases N6-methyladenosine modification and stability of PDK1 mRNA, activating the AKT/mTOR signaling pathway to drive osteosarcoma malignancy.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay, overexpression/knockdown, m6A profiling, AKT/mTOR pathway analysis in osteosarcoma cells\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP, ubiquitination, KD/OE with pathway readout; single lab\",\n      \"pmids\": [\"41145484\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"TRIM17 (Terf/RNF16) was molecularly cloned and characterized as a novel RBCC/TRIM protein containing an N-terminal RING finger domain, one B-box, and a middle coiled-coil domain; Northern blot showed near-exclusive expression in testis.\",\n      \"method\": \"PCR with degenerate primers, cDNA library screening, Northern blot analysis, domain analysis\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — molecular cloning and domain characterization; foundational identification paper\",\n      \"pmids\": [\"9792805\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"PPARγ activation (by DEHP or the PPARγ agonist troglitazone) induces Trim17 protein expression in Neuro-2a neuroblastoma cells, which is associated with caspase-3 cleavage and apoptosis; this induction is blocked by the PPARγ antagonist GW9662.\",\n      \"method\": \"Chemical activation/inhibition of PPARγ, western blot for Trim17 and cleaved caspase-3, cell viability assays\",\n      \"journal\": \"Toxicology letters\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — pharmacological modulation with expression readout only; no direct mechanistic link established\",\n      \"pmids\": [\"21856391\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"TRIM17 is a RING-domain E3 ubiquitin ligase that can both promote substrate ubiquitination and proteasomal degradation (of Mcl-1, ZWINT, BCL2A1 via antagonizing TRIM28, RBM38, BAX, FTO, and ZSCAN21 via antagonizing TRIM41) and paradoxically stabilize other proteins by binding to and inhibiting partner E3 ligases (TRIM28, TRIM41); its pro-apoptotic activity in neurons requires GSK3-mediated phosphorylation of substrates for recognition, is transcriptionally induced by NFATc3/c-Jun, and is regulated upstream by the PI3K/Akt/GSK3 pathway, while also controlling selective autophagy of midbodies through modulation of Mcl-1–Beclin-1 complexes.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"TRIM17 is a RING-domain E3 ubiquitin ligase that functions as a dual regulator of protein stability — directly ubiquitinating substrates for proteasomal degradation and inhibiting partner E3 ligases to stabilize specific targets. TRIM17 promotes K48-linked ubiquitination and degradation of the anti-apoptotic protein Mcl-1 in a GSK3 phosphorylation-dependent manner, triggering Bax-dependent neuronal apoptosis, and also targets ZWINT, RBM38, BAX, and FTO for proteasomal degradation in various cellular contexts [PMID:22976837, PMID:22023800, PMID:37219768, PMID:37697039, PMID:41145484]. Paradoxically, TRIM17 stabilizes BCL2A1 and ZSCAN21 by physically blocking the E3 ligases TRIM28 and TRIM41, respectively, from ubiquitinating these substrates, thereby modulating melanoma drug resistance and α-synuclein transcription [PMID:30042493, PMID:30485814]. TRIM17 also regulates selective autophagy of midbodies through modulation of Mcl-1–Beclin-1 complexes, and its expression is transcriptionally induced by NFATc3/c-Jun in a feedback loop and regulated upstream by the PI3K/Akt/GSK3 pathway during developmental neuronal apoptosis [PMID:27562068, PMID:25215946, PMID:20559321].\",\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Identification of TRIM17 as a novel RBCC/TRIM family member with RING, B-box, and coiled-coil domains established the gene's structural framework and revealed near-exclusive testis expression, posing the question of its enzymatic and biological function.\",\n      \"evidence\": \"PCR cloning, cDNA library screening, Northern blot in mouse tissues\",\n      \"pmids\": [\"9792805\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No enzymatic activity demonstrated\", \"Function unknown beyond domain architecture\", \"Expression in other tissues not explored at protein level\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Demonstration that TRIM17 possesses intrinsic E3 ubiquitin ligase activity with UbcH6 as its cognate E2, and that TRIM44 stabilizes TRIM17 by blocking its auto-ubiquitination, established TRIM17 as a bona fide ubiquitin ligase subject to regulation by a partner TRIM protein.\",\n      \"evidence\": \"In vitro ubiquitination assay, proteasome inhibitor chase, Co-IP of TRIM17–TRIM44\",\n      \"pmids\": [\"19358823\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No physiological substrate identified\", \"Functional consequence of TRIM44-mediated stabilization not tested in vivo\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Showing that TRIM17 RING domain activity is necessary and sufficient for Bax-dependent neuronal apoptosis, and that TRIM17 is induced by PI3K/Akt/GSK3 pathway inhibition in cerebellar granule neurons, answered the central question of TRIM17's biological role and placed it in a defined signaling axis during developmental cell death.\",\n      \"evidence\": \"OE/KD in primary CGN and sympathetic neurons, dominant-negative RING mutants, Bax−/− epistasis, pharmacological pathway inhibition, in vivo immunostaining\",\n      \"pmids\": [\"20559321\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ubiquitination substrate mediating apoptosis not yet identified\", \"Transcriptional regulation mechanism not resolved\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Identification of ZWINT as a TRIM17 substrate degraded via the coiled-coil domain interaction linked TRIM17 to kinetochore biology and cell proliferation control beyond its neuronal apoptosis role.\",\n      \"evidence\": \"Yeast two-hybrid, Co-IP, coiled-coil deletion mapping, siRNA KD, proliferation assay\",\n      \"pmids\": [\"22023800\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Ubiquitin chain linkage type on ZWINT not determined\", \"In vivo relevance to cell cycle not shown\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Identification of Mcl-1 as the direct pro-apoptotic substrate of TRIM17, requiring GSK3-dependent phosphorylation for recognition and K48-linked ubiquitination, resolved how TRIM17 E3 activity connects to the Bax-dependent apoptotic pathway in neurons.\",\n      \"evidence\": \"Endogenous Co-IP, in vitro ubiquitination, phospho-site mutagenesis blocking interaction, KD reducing Mcl-1 ubiquitination\",\n      \"pmids\": [\"22976837\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether TRIM17 is the sole E3 for Mcl-1 degradation in neurons not resolved\", \"Structural basis of phospho-dependent recognition unknown\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Discovery that NFATc3/c-Jun directly transcribes TRIM17 while TRIM17 reciprocally inhibits NFATc3 nuclear translocation established a negative feedback loop governing TRIM17 expression during neuronal apoptosis.\",\n      \"evidence\": \"ChIP on Trim17 promoter, luciferase reporters, nuclear/cytoplasmic fractionation, OE/KD in CGN\",\n      \"pmids\": [\"25215946\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which TRIM17 retains SUMOylated NFATc3 in cytoplasm unknown\", \"Whether TRIM17 ubiquitinates NFATc3 indirectly not excluded\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Demonstrating that TRIM17 promotes selective autophagic degradation of midbodies while inhibiting bulk autophagy through Mcl-1–Beclin-1 complex stabilization revealed a non-apoptotic function and explained how TRIM17 coordinates apoptotic and autophagic pathways via a shared Mcl-1 node.\",\n      \"evidence\": \"Co-IP, autophagy flux assays, midbody imaging, OE/KD in mammalian cells\",\n      \"pmids\": [\"27562068\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of selective Mcl-1 loss at midbodies unclear\", \"Whether TRIM17 directly ubiquitinates autophagy components not tested\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Two studies revealed that TRIM17 can stabilize proteins by inhibiting partner E3 ligases: it blocks TRIM28-mediated ubiquitination of BCL2A1 (relevant to melanoma drug resistance) and TRIM41-mediated ubiquitination of ZSCAN21 (controlling α-synuclein transcription), fundamentally expanding TRIM17's mechanism from substrate-directed E3 to E3 ligase antagonist.\",\n      \"evidence\": \"Endogenous Co-IP, KO/KD with ubiquitination readouts, subcellular fractionation, melanoma drug sensitivity assays (BCL2A1); Co-IP, ubiquitination assays, SNCA mRNA measurement, MPTP mouse model (ZSCAN21)\",\n      \"pmids\": [\"30042493\", \"30485814\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of TRIM17-mediated E3 inhibition not determined\", \"Whether TRIM17 catalytic activity is required for the inhibitory function not resolved\", \"Relevance of ZSCAN21–SNCA axis to Parkinson's disease pathology not confirmed in human tissue\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identification of BAX and RBM38 as direct K48-linked ubiquitination substrates of TRIM17 in gastric cancer and lung cancer cells, respectively, showed that TRIM17 can function as an anti-apoptotic and chemoresistance factor in cancer contexts — inverting its neuronal pro-apoptotic role.\",\n      \"evidence\": \"K48-linkage-specific ubiquitination assays, Co-IP, OE/KD with apoptosis and drug resistance readouts in cancer cell lines\",\n      \"pmids\": [\"37697039\", \"37219768\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Context-dependent switch between pro- and anti-apoptotic roles mechanistically unexplained\", \"BAX ubiquitination by TRIM17 reported from single labs — independent confirmation lacking\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Demonstration that TRIM17 ubiquitinates FTO to regulate m6A-dependent mRNA stability and AKT/mTOR signaling in osteosarcoma, and that TMEFF2 recruits TRIM17 to BAX in a ternary complex in prostate tissue, expanded the substrate repertoire and revealed adaptor-mediated substrate recruitment as a regulatory mechanism.\",\n      \"evidence\": \"Co-IP, ubiquitination assays, m6A profiling, AKT/mTOR readouts (FTO); Co-IP of ternary complex, CHX chase, rat BPH model (BAX/TMEFF2)\",\n      \"pmids\": [\"41145484\", \"40780616\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Generality of adaptor-mediated recruitment to other substrates unknown\", \"FTO as TRIM17 substrate awaits independent replication\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"What determines whether TRIM17 acts as a substrate-directed E3 ligase versus an E3 ligase antagonist in different cellular contexts remains unresolved, as does the structural basis for substrate versus partner E3 recognition.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No structural model of TRIM17 or its complexes available\", \"Context-dependent functional switch mechanism undefined\", \"Physiological role in testis (highest expression tissue) completely uncharacterized\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [0, 1, 2, 3, 9, 10, 11, 12]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [4, 7]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [0, 1, 9]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [1, 3, 4, 7, 10, 12]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [6]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [5, 8]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"MCL1\", \"TRIM28\", \"TRIM41\", \"TRIM44\", \"ZWINT\", \"BAX\", \"ZSCAN21\", \"FTO\"],\n    \"other_free_text\": []\n  }\n}\n```"}