{"gene":"TRIM37","run_date":"2026-06-10T10:51:56","timeline":{"discoveries":[{"year":2014,"finding":"TRIM37 functions as an E3 ubiquitin ligase that mono-ubiquitinates histone H2A (a chromatin modification associated with transcriptional repression). In 17q23-amplified breast cancer cells, TRIM37 associates with polycomb repressive complex 2 (PRC2), and together with PRC2 and PRC1 co-occupies target gene promoters to silence them. RNAi-mediated knockdown of TRIM37 results in loss of ubiquitinated H2A, dissociation of PRC1 and PRC2 from target promoters, and transcriptional reactivation of silenced genes including tumor suppressors.","method":"In vitro ubiquitin ligase assay, genome-wide ChIP-chip, RNA interference knockdown, co-immunoprecipitation, mouse xenograft tumor growth assay","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — multiple orthogonal methods (in vitro ubiquitination assay, ChIP-chip, Co-IP, RNAi with defined phenotypic readout) in a single rigorous study published in Nature","pmids":["25470042"],"is_preprint":false},{"year":2002,"finding":"TRIM37 protein localizes to peroxisomes, as demonstrated by colocalization with peroxisomal markers in transfected cells and endogenous staining in HepG2 and intestinal smooth muscle cell lines. Peroxisomal localization requires PEX1 and PEX5 but not PEX7, as TRIM37 fails to import into peroxisomes in PEX1(-/-) and PEX5(-/-) mutant fibroblasts. A major Finnish disease-associated mutation abrogates peroxisomal localization, classifying mulibrey nanism as a peroxisomal disorder.","method":"Immunofluorescence colocalization with peroxisomal markers, transfection of mutant constructs, analysis in peroxin-deficient fibroblasts (PEX1-/-, PEX5-/-, PEX7-/- cells), immunohistochemistry","journal":"American journal of human genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal approaches (colocalization, genetic complementation in peroxin-deficient cells, mutant protein analysis), replicated in multiple cell lines","pmids":["11938494"],"is_preprint":false},{"year":2005,"finding":"TRIM37 possesses RING-domain-dependent E3 ubiquitin ligase activity. Full-length TRIM37 and its TRIM domain undergo polyubiquitination when co-expressed with ubiquitin; bacterially produced GST-TRIM domain is polyubiquitinated in cell-free conditions. This activity is abolished by RING-domain mutation (Cys35Ser;Cys36Ser) and by the disease-associated missense mutation Leu76Pro. Ectopically expressed TRIM37 forms ubiquitin-, proteasome-, and chaperone-positive aggresomes; RING-mutant and patient-mutant proteins are markedly less prone to aggregation.","method":"Cell-free ubiquitination assay with bacterially produced GST-TRIM domain, co-expression with ubiquitin in cells, RING-domain mutagenesis (Cys35Ser;Cys36Ser), immunofluorescence analysis of aggresomes, yeast two-hybrid identification of ubiquitin as binding partner","journal":"Experimental cell research","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro cell-free ubiquitination assay with active-site mutagenesis, multiple orthogonal methods in one study","pmids":["15885686"],"is_preprint":false},{"year":2017,"finding":"TRIM37 localizes to peroxisomal membranes and ubiquitylates PEX5 at lysine 464 (K464) by interacting with the C-terminal 51 amino acids (CT51) of PEX5. This ubiquitylation stabilizes PEX5 by preventing its proteasomal degradation, thereby promoting PTS protein import into peroxisomes. PEX5 mutations K464A or ΔCT51, or TRIM37 depletion/mutation, reduce PEX5 abundance and impair its cargo-binding and import functions. TRIM37 or PEX5 depletion induces apoptosis and enhances oxidative stress sensitivity.","method":"Co-immunoprecipitation, site-directed mutagenesis (K464A, ΔCT51), protein stability assay, peroxisomal import assay, RNAi knockdown, apoptosis assay, immunofluorescence localization","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — reciprocal Co-IP, site-directed mutagenesis identifying specific ubiquitylation site, functional import assay, multiple orthogonal methods in one rigorous study","pmids":["28724525"],"is_preprint":false},{"year":2018,"finding":"TRIM37 interacts with MTOR and RRAGB proteins, enhances the MTOR-RRAGB interaction, and promotes lysosomal localization of MTOR, thereby activating amino acid-stimulated MTORC1 signaling. Loss of TRIM37 function reduces TFEB phosphorylation, causing TFEB nuclear translocation and transcriptional activation of lysosome biogenesis and autophagy genes. Enhanced autophagy upon TRIM37 loss depends on MTORC1 inhibition.","method":"Co-immunoprecipitation (TRIM37 with MTOR and RRAGB), immunofluorescence (lysosomal MTOR localization), western blotting (TFEB phosphorylation), RNAi knockdown, autophagy flux assays","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP interactions identified, functional readouts with knockdown, single lab but two orthogonal methods","pmids":["29940807"],"is_preprint":false},{"year":2018,"finding":"In response to genotoxic stress, ATM kinase phosphorylates TRIM37 in the cytoplasm, inducing its nuclear translocation. In the nucleus, TRIM37 forms a complex with NEMO and TRAF6 via a TRAF6-binding motif (TBM) and monoubiquitinates NEMO at K309, driving nuclear export of NEMO and subsequent IKK/NF-κB activation. A cell-penetrating TAT-TBM peptide that blocks this complex abrogates genotoxic NF-κB activation and sensitizes cancer cells to cisplatin.","method":"Co-immunoprecipitation, in vitro ubiquitination assay (monoubiquitination of NEMO K309), immunofluorescence (nuclear translocation), ATM kinase assay, TAT-TBM peptide inhibitor experiments, mutation of TRAF6-binding motif, xenograft in vivo experiments","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — multiple orthogonal methods (in vitro ubiquitination, kinase assay, Co-IP, mutagenesis, peptide inhibitor) in one rigorous study","pmids":["30254148"],"is_preprint":false},{"year":2020,"finding":"TRIM37 levels determine cellular vulnerability to PLK4 inhibition. High TRIM37 levels inhibit acentrosomal spindle assembly by promoting degradation of the centrosomal component CEP192, leading to mitotic failure when centrosomes are depleted. Low TRIM37 levels permit PLK4 to self-assemble into centrosome-independent condensates that serve as ectopic microtubule-organizing centres, enabling acentrosomal mitosis. Chr17q amplification (containing TRIM37) renders neuroblastoma and breast cancer cells highly sensitive to PLK4 inhibition.","method":"TRIM37 overexpression and knockdown with mitotic outcome assays, immunofluorescence, PLK4 inhibitor treatment, TRIM37-directed degradation of CEP192 assay, analysis of PLK4 condensate formation","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 / Strong — loss-of-function and gain-of-function with defined mechanistic readouts (CEP192 degradation, PLK4 condensate formation), published in Nature with extensive controls","pmids":["32908304"],"is_preprint":false},{"year":2020,"finding":"TRIM37 overexpression acts as a negative regulator of centrosomal pericentriolar material (PCM). In cells lacking centrosomes (after PLK4 inhibition), elevated TRIM37 blocks the formation of PCM foci that are required for acentrosomal spindle assembly and successful cell division. Overexpression of TRIM37 also delays centrosome maturation and separation at mitotic entry, increasing the frequency of mitotic errors and causing genomic instability.","method":"PLK4 inhibitor-induced centrosome depletion, TRIM37 overexpression/knockdown, immunofluorescence of PCM foci, mitotic timing assays, chromosome segregation analysis, live-cell imaging","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 / Strong — two independent Nature papers (PMIDs 32908304 and 32908313) using orthogonal methods consistently establishing the same mechanism","pmids":["32908313"],"is_preprint":false},{"year":2021,"finding":"TRIM37 prevents the formation of centriolar protein assemblies (Cenpas) by regulating the stability and solubility of Centrobin. TRIM37 depletion causes Centrobin to accumulate in elongated entities that seed Cenpas formation; these Cenpas can act as microtubule-organizing centres. Cenpas formation upon TRIM37 depletion requires PLK4 and two parallel pathways relying on Centrobin and PLK1, respectively. TRIM37 interacts with and ubiquitinates Centrobin. Mulibrey patient-derived cells harbor these Centrobin condensate-organized ectopic poles.","method":"TRIM37 depletion, immunofluorescence, correlative light-electron microscopy, PLK4/PLK1/Centrobin epistasis analysis (double knockdown), Co-IP and ubiquitination assay of Centrobin, analysis of patient-derived cells","journal":"eLife","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — genetic epistasis, Co-IP/ubiquitination, CLEM, patient-derived cell validation, multiple orthogonal methods in one study","pmids":["33491649"],"is_preprint":false},{"year":2021,"finding":"TRIM37 prevents assembly of a centrobin-scaffolded structured condensate that buds off centrosomes and organizes ectopic spindle poles. In ~25% of TRIM37-deficient cells, the condensate recruits centrosomal proteins and acquires microtubule nucleation capacity during mitotic entry, causing transient multipolarity and multipolar segregation. Centrobin interacts with and is ubiquitinated by TRIM37. Removing Centrobin suppresses ectopic spindle pole formation and multipolar segregation in TRIM37-deficient cells.","method":"TRIM37 KO cell lines, live-cell imaging, immunofluorescence, structured illumination microscopy, Co-IP and ubiquitination assay (TRIM37-Centrobin), Centrobin knockdown epistasis, chromosome segregation assays, patient-derived cell analysis","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — ubiquitination assay with substrate identification, genetic epistasis, live imaging, multiple orthogonal methods; consistent with independent eLife paper (PMID 33491649)","pmids":["33983387"],"is_preprint":false},{"year":2018,"finding":"TRIM37 promotes K63-linked polyubiquitination of TRAF2, sustaining activation of the NF-κB pathway in non-small-cell lung cancer. Mutation of the RING finger domain of TRIM37 abolishes its ability to promote K63 polyubiquitination of TRAF2 and NF-κB activation. TRIM37 binds to TRAF2 as demonstrated by co-immunoprecipitation.","method":"Co-immunoprecipitation (TRIM37-TRAF2), in vitro/cellular ubiquitination assay, RING-domain mutagenesis, NF-κB luciferase reporter, overexpression and RNAi knockdown with apoptosis/proliferation readouts","journal":"The Journal of pathology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP and ubiquitination assay with RING mutagenesis, single lab, two orthogonal methods","pmids":["30043491"],"is_preprint":false},{"year":2020,"finding":"TRIM37-directed histone H2A monoubiquitination enforces changes in DNA repair that render TP53-mutant triple-negative breast cancer cells resistant to chemotherapy. A positive feedback loop via ATM/E2F1/STAT signaling amplifies the TRIM37 network in chemoresistant cells. TRIM37 inhibition using antisense oligonucleotides conjugated to antifolate receptor 1 nanoparticles reduces lung metastasis in vivo.","method":"RNAi knockdown, TRIM37-specific antisense oligonucleotide nanoparticles, H2A ubiquitination assay, spontaneous metastatic murine models, transcriptomic analysis, ATM/E2F1/STAT pathway analysis","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — H2A ubiquitination assay, in vivo model, pathway analysis with knockdown; single lab with multiple orthogonal methods","pmids":["32855208"],"is_preprint":false},{"year":2020,"finding":"TRIM37 mediates K48-linked ubiquitination and proteasomal degradation of PTEN, activating the AKT-GSK-3β-β-catenin signaling pathway in pancreatic cancer cells to sustain stemness and chemoresistance.","method":"Co-immunoprecipitation (TRIM37-PTEN), ubiquitination assay (K48-linked), protein stability assay, immunofluorescence, RNAi knockdown, mouse xenograft","journal":"Frontiers in oncology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ubiquitination and degradation assay, in vivo model; single lab with multiple orthogonal methods","pmids":["33194618"],"is_preprint":false},{"year":2022,"finding":"TRIM37 stimulates K63-chain-linked ubiquitination of the transcription factor AP-2γ, promoting AP-2γ translocation from the cytoplasm to the nucleus and facilitating AP-2γ chromatin binding and transcriptional activity in breast cancer cells.","method":"Proteomics/mass spectrometry to identify TRIM37-AP-2γ interaction, Co-immunoprecipitation, ubiquitination assay (K63-linked), immunofluorescence (AP-2γ localization), ChIP-seq (AP-2γ chromatin binding), RNAi knockdown with transcriptional readouts","journal":"International journal of biological sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — MS-identified interaction, Co-IP, K63 ubiquitination assay, ChIP-seq, single lab with multiple orthogonal methods","pmids":["35864973"],"is_preprint":false},{"year":2022,"finding":"TRIM37 directly interacts with the tumor suppressor P53 protein and promotes its K48-linked ubiquitination and proteasomal degradation, thereby activating aerobic glycolysis and promoting hepatocellular carcinoma progression. Knockdown of P53 reverses the effects of TRIM37 knockdown on HCC cell growth and metastasis.","method":"Co-immunoprecipitation (TRIM37-P53), ubiquitination assay, protein stability assay, glycolysis assays (lactate, glucose, ATP), functional cell assays, P53 knockdown epistasis, mouse xenograft","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ubiquitination assay, genetic epistasis; single lab with multiple orthogonal methods","pmids":["36252649"],"is_preprint":false},{"year":2020,"finding":"TRIM37 promotes K63-linked ubiquitination of TRAF6, facilitating NF-κB pathway activation. In the context of virus infection, TRIM37 positively regulates inflammatory responses; TRIM37 knockout reduces proinflammatory cytokine levels in bone marrow-derived macrophages and inhibits immune responses in H1N1-infected mice. Direct interaction between TRIM37 and TRAF6 was demonstrated by immunoprecipitation.","method":"Co-immunoprecipitation (TRIM37-TRAF6), K63 ubiquitination assay, TRIM37 knockout mice, ELISA (cytokines), flow cytometry, H&E staining, western blotting","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, K63 ubiquitination assay, TRIM37-KO mouse model; single lab with multiple orthogonal methods","pmids":["33839419"],"is_preprint":false},{"year":2020,"finding":"TRIM37 physically interacts with SMAD7 and promotes its ubiquitination-mediated proteasomal degradation, thereby enabling TGF-β signaling-dependent hepatic fibrosis. NF-κB activation mediated by ROS is necessary for transcriptional induction of TRIM37 during HBV infection.","method":"Co-immunoprecipitation (TRIM37-SMAD7), ubiquitination/degradation assay, RNAi knockdown, mouse fibrosis model, NF-κB reporter, ROS inhibitor treatment","journal":"Molecular therapy. Nucleic acids","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ubiquitination assay, in vivo mouse model; single lab with multiple orthogonal methods","pmids":["32916597"],"is_preprint":false},{"year":2023,"finding":"TRIM37 promotes Wnt/β-catenin signaling in gallbladder cancer by ubiquitinating Axin1, leading to Axin1 degradation and subsequent β-catenin stabilization and activation.","method":"Co-immunoprecipitation (TRIM37-Axin1), ubiquitination assay, protein stability assay, RNAi knockdown, in vitro and in vivo functional assays","journal":"Translational oncology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — Co-IP and ubiquitination assay reported, single lab, single publication, limited mechanistic follow-up details in abstract","pmids":["37379772"],"is_preprint":false},{"year":2023,"finding":"TRIM37 directly interacts with TRAF6 and promotes K63-linked ubiquitination of TRAF6, leading to IKKβ phosphorylation. Additionally, TRIM37 enhances translocation of IKKγ (NEMO) from the nucleus to the cytoplasm, stabilizing the cytoplasmic IKK complex and prolonging NF-κB-driven inflammation during hepatic ischemia/reperfusion injury.","method":"Co-immunoprecipitation (TRIM37-TRAF6), immunofluorescence (IKKγ translocation), western blotting (subcellular fractionation), IKK inhibitor rescue experiments, in vivo 70% hepatic I/R model","journal":"Molecular medicine (Cambridge, Mass.)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, immunofluorescence localization with functional consequence, in vivo model; single lab","pmids":["37158850"],"is_preprint":false},{"year":2021,"finding":"During PM-induced autophagy in lung epithelial cells, TRIM37 is itself degraded via autophagy. This degradation of TRIM37 protects TRAF6 from proteasomal degradation, increasing TRAF6 levels and thereby driving NF-κB-dependent chemokine production that recruits neutrophils and promotes pre-metastatic niche formation.","method":"RNAi knockdown of TRIM37 and TRAF6, autophagy inhibition (hydroxychloroquine), ROS blockade, immunofluorescence, in vitro and in vivo lung metastasis models","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis (TRIM37 autophagy degradation protects TRAF6), in vivo model, multiple orthogonal methods; single lab","pmids":["34524943"],"is_preprint":false},{"year":2016,"finding":"Trim37 knockout mice recapitulate several features of human mulibrey nanism including infertility (germ cell aplasia, Leydig cell hyperplasia, lipid accumulation), elevated FSH/LH, elevated fasting blood glucose, non-compaction cardiomyopathy, hepatomegaly, fatty liver, and tumor formation. Liver peroxisome amount and morphology appeared normal in Trim37-/- mice.","method":"Trim37 knockout mouse model, CT scan (skeletal parameters), histology, hormone assays, glucose/insulin measurements, autopsy/tumor analysis, electron microscopy of peroxisomes","journal":"Biology open","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean KO mouse model with defined multi-organ phenotypic readouts; single lab","pmids":["27044324"],"is_preprint":false},{"year":2006,"finding":"TRIM37 mutations affecting the B-box domain (p.Cys109Ser) and the TRAF domain (p.Glu271_Ser287del in-frame deletion) both alter the subcellular localization of TRIM37, suggesting that both the B-box and TRAF domains are important for TRIM37 protein-protein interactions and proper peroxisomal targeting.","method":"Immunofluorescence of transfected mutant constructs to assess subcellular localization","journal":"Clinical genetics","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single method (immunofluorescence of localization), single case study, no functional follow-up","pmids":["17100991"],"is_preprint":false},{"year":2015,"finding":"TRIM37 activates Wnt/β-catenin signaling in hepatocellular carcinoma by interacting with β-catenin and activating the transcriptional activity of the β-catenin/TCF complex, as well as expression of downstream target genes. This activation promotes EMT, cell migration, and metastasis.","method":"Co-immunoprecipitation (TRIM37-β-catenin), dual-luciferase reporter assay (β-catenin/TCF transcriptional activity), RNAi knockdown and overexpression, in vivo metastasis assay","journal":"Biochemical and biophysical research communications","confidence":"Low","confidence_rationale":"Tier 3 / Weak — Co-IP and luciferase reporter, single lab, limited mechanistic depth on ubiquitination substrate","pmids":["26208456"],"is_preprint":false},{"year":2020,"finding":"PBK kinase directly interacts with TRIM37 and promotes its phosphorylation and nuclear translocation, which subsequently activates the NF-κB pathway to confer olaparib (PARP inhibitor) resistance in ovarian cancer cells.","method":"Co-immunoprecipitation (PBK-TRIM37), immunofluorescence (nuclear translocation), PBK inhibitor treatment, RNAi knockdown, in vitro and in vivo resistance assays","journal":"Experimental & molecular medicine","confidence":"Low","confidence_rationale":"Tier 3 / Weak — Co-IP, single lab, limited mechanistic follow-up details available from abstract","pmids":["35859118"],"is_preprint":false},{"year":2020,"finding":"ASB16-AS1 lncRNA cooperates with ATM serine/threonine kinase to induce TRIM37 phosphorylation (post-translational modification), activating the NF-κB pathway in gastric cancer cells.","method":"Co-immunoprecipitation, RNA immunoprecipitation (RIP), luciferase reporter assay, pulldown assay","journal":"Gastric cancer","confidence":"Low","confidence_rationale":"Tier 3 / Weak — phosphorylation inferred from Co-IP and functional assays, single lab, abstract-level description insufficient to confirm direct kinase assay","pmids":["32572790"],"is_preprint":false},{"year":2021,"finding":"TRIM37 orchestrates TGF-β1 signaling activation in renal cell carcinoma through direct mediation of histone H2A ubiquitination modifications, thereby promoting EMT and malignant progression.","method":"RNAi knockdown and overexpression, ubiquitination assay (H2A), TGF-β1 pathway analysis, interactive network analysis, in vitro and in vivo functional assays","journal":"Journal of experimental & clinical cancer research","confidence":"Low","confidence_rationale":"Tier 3 / Weak — ubiquitination assay and pathway analysis, single lab, limited mechanistic detail in abstract","pmids":["34130705"],"is_preprint":false}],"current_model":"TRIM37 is an E3 ubiquitin ligase (RING-finger-dependent) with multiple established substrates: it mono-ubiquitinates histone H2A to repress transcription in concert with PRC2/PRC1 complexes; ubiquitinates PEX5 at K464 to stabilize it and promote peroxisomal matrix protein import; ubiquitinates Centrobin to prevent its condensation into ectopic microtubule-organizing centres; monoubiquitinates NEMO at K309 (triggered by ATM-mediated phosphorylation of TRIM37) to drive nuclear-to-cytoplasmic NF-κB signaling; and promotes K63-linked ubiquitination of TRAF2 and TRAF6 to activate NF-κB; at centrosomes, TRIM37 prevents PLK4 from forming condensate-based ectopic spindle poles and targets CEP192 for degradation to control centrosome maturation, with levels of TRIM37 being a key determinant of sensitivity to PLK4 inhibition; additionally, TRIM37 positively regulates MTORC1 signaling by enhancing the MTOR-RRAGB interaction and lysosomal MTOR localization, suppressing autophagy via the TFEB axis."},"narrative":{"mechanistic_narrative":"TRIM37 is a RING-domain E3 ubiquitin ligase whose catalytic activity is essential for its diverse cellular roles, abolished by RING mutation and by disease-associated point mutations [PMID:15885686]. Through monoubiquitination of histone H2A, it acts as a transcriptional repressor that cooperates with PRC1 and PRC2 to co-occupy and silence target promoters, including tumor suppressor genes in 17q23-amplified breast cancer [PMID:25470042]. At the centrosome, TRIM37 is a key safeguard of mitotic fidelity: it ubiquitinates and limits Centrobin to prevent its condensation into ectopic, microtubule-nucleating centriolar assemblies, and it targets CEP192 for degradation while restraining PLK4 condensate-based ectopic spindle poles—activities that make TRIM37 levels (elevated by chr17q amplification) a determinant of sensitivity to PLK4 inhibition [PMID:32908304, PMID:33491649, PMID:33983387]. TRIM37 also localizes to peroxisomal membranes in a PEX1/PEX5-dependent manner, where it ubiquitinates PEX5 at K464 to stabilize it and promote peroxisomal matrix protein import [PMID:11938494, PMID:28724525]. In genotoxic stress signaling, ATM phosphorylates TRIM37 to drive its nuclear translocation, where it monoubiquitinates NEMO at K309 within a TRAF6-containing complex to trigger nuclear export of NEMO and IKK/NF-κB activation [PMID:30254148]. TRIM37 further activates NF-κB through K63-linked ubiquitination of TRAF2 and TRAF6 [PMID:30043491, PMID:33839419], and positively regulates MTORC1 by enhancing the MTOR–RRAGB interaction and lysosomal MTOR localization, thereby suppressing TFEB-driven autophagy [PMID:29940807]. Germline loss-of-function in TRIM37 causes mulibrey nanism, and Trim37-knockout mice recapitulate multi-organ disease features including infertility, cardiomyopathy, and metabolic abnormalities [PMID:11938494, PMID:27044324].","teleology":[{"year":2002,"claim":"Established where TRIM37 acts in the cell and tied its localization to disease, showing peroxisomal targeting depends on the import machinery and is lost in a major disease mutation.","evidence":"Immunofluorescence colocalization and complementation in PEX1-/-, PEX5-/-, PEX7-/- fibroblasts, with disease-mutant constructs","pmids":["11938494"],"confidence":"High","gaps":["Did not define the molecular activity of TRIM37 at peroxisomes","No substrate identified at this stage"]},{"year":2005,"claim":"Defined TRIM37 as a bona fide RING-dependent E3 ubiquitin ligase and showed disease mutations cripple its catalytic/folding properties, supplying the enzymatic basis for all later substrate work.","evidence":"Cell-free ubiquitination with GST-TRIM domain, RING mutagenesis (C35S;C36S), aggresome imaging, yeast two-hybrid","pmids":["15885686"],"confidence":"High","gaps":["No physiological substrate identified","Autoubiquitination shown but chain linkage and cellular consequence undefined"]},{"year":2014,"claim":"Identified the first substrate-level chromatin function: TRIM37 monoubiquitinates H2A and partners with PRC1/PRC2 to silence tumor suppressors, explaining its oncogenic role in 17q23-amplified breast cancer.","evidence":"In vitro ubiquitination, genome-wide ChIP-chip, Co-IP, RNAi with transcriptional reactivation, xenografts","pmids":["25470042"],"confidence":"High","gaps":["Mechanism of TRIM37 recruitment to specific promoters not resolved","Direct biochemical interaction with PRC2 subunits not fully mapped"]},{"year":2017,"claim":"Resolved how TRIM37 supports peroxisome function mechanistically: it ubiquitinates PEX5 at K464 to stabilize it and sustain matrix protein import, linking enzymatic activity to organelle homeostasis.","evidence":"Reciprocal Co-IP, site-directed mutagenesis (K464A, ΔCT51), import and protein-stability assays, apoptosis readouts","pmids":["28724525"],"confidence":"High","gaps":["Ubiquitin chain type on PEX5 stabilization not fully characterized","Reconciliation with normal peroxisome morphology in Trim37-KO mice unexplained"]},{"year":2018,"claim":"Connected TRIM37 to genotoxic NF-κB signaling, showing ATM phosphorylation drives nuclear TRIM37 to monoubiquitinate NEMO at K309 and trigger IKK activation, defining a druggable node for chemosensitization.","evidence":"Co-IP, in vitro ubiquitination of NEMO K309, ATM kinase assay, TBM mutagenesis, TAT-TBM peptide, xenografts","pmids":["30254148"],"confidence":"High","gaps":["Structural basis of TRAF6/NEMO complex assembly unresolved","Relationship to cytoplasmic TRAF-directed NF-κB activation not integrated"]},{"year":2018,"claim":"Extended TRIM37 into nutrient signaling, showing it enhances MTOR-RRAGB interaction and lysosomal MTOR localization to activate MTORC1 and suppress TFEB-driven autophagy.","evidence":"Co-IP (MTOR, RRAGB), immunofluorescence of lysosomal MTOR, TFEB phosphorylation blots, autophagy flux assays","pmids":["29940807"],"confidence":"Medium","gaps":["Whether MTORC1 regulation requires TRIM37 ligase activity not established","No direct ubiquitination substrate in this axis identified"]},{"year":2018,"claim":"Broadened TRIM37's NF-κB role beyond NEMO by showing RING-dependent K63 ubiquitination of TRAF2 sustains pathway activation in lung cancer.","evidence":"Co-IP, ubiquitination assay, RING mutagenesis, NF-κB reporter, knockdown phenotypes","pmids":["30043491"],"confidence":"Medium","gaps":["TRAF2 ubiquitination site not mapped","Single lab without reciprocal validation"]},{"year":2020,"claim":"Defined TRIM37 as a centrosomal gatekeeper whose levels dictate vulnerability to PLK4 inhibition by degrading CEP192 and restraining PLK4 condensates that drive acentrosomal mitosis.","evidence":"Two independent Nature studies: gain/loss-of-function with mitotic outcome assays, CEP192 degradation, PLK4 condensate and PCM foci imaging","pmids":["32908304","32908313"],"confidence":"High","gaps":["Direct ubiquitination of CEP192 vs. indirect regulation not fully separated","Mechanism by which TRIM37 senses centrosome state unclear"]},{"year":2021,"claim":"Pinpointed Centrobin as the centrosomal substrate whose TRIM37-dependent ubiquitination controls solubility, preventing condensate-scaffolded ectopic spindle poles seen in patient cells.","evidence":"Two studies: TRIM37 KO/depletion, CLEM/SIM imaging, Co-IP and ubiquitination of Centrobin, PLK4/PLK1/Centrobin epistasis, patient-derived cells","pmids":["33491649","33983387"],"confidence":"High","gaps":["Ubiquitin chain linkage on Centrobin not defined","Why only a subset of cells form ectopic poles unexplained"]},{"year":2020,"claim":"Linked TRIM37 H2A ubiquitination to DNA-repair-driven chemoresistance in TP53-mutant breast cancer via an ATM/E2F1/STAT feedback loop, with therapeutic targeting in vivo.","evidence":"RNAi, antisense-oligonucleotide nanoparticles, H2A ubiquitination assay, metastasis models, transcriptomics","pmids":["32855208"],"confidence":"Medium","gaps":["Direct vs. indirect contribution of H2A ubiquitination to repair changes unresolved","Feedback loop wiring not fully dissected"]},{"year":null,"claim":"A wide array of additional reported substrates and signaling outputs (PTEN, P53, AP-2γ, Axin1, SMAD7, TRAF6) tie TRIM37 to Wnt/β-catenin, glycolysis, TGF-β and inflammatory programs across cancers, but it remains unresolved which represent direct, generalizable activities versus context-specific or low-confidence observations.","evidence":"","pmids":[],"confidence":"Low","gaps":["Many substrate claims rest on single-lab Co-IP/ubiquitination without reciprocal or structural validation","Ubiquitin chain types and modification sites largely unmapped","Unifying logic that selects among TRIM37's many substrates in a given cell is unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016740","term_label":"transferase activity","supporting_discovery_ids":[0,2,3,5,8,9,10,15]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[0,2,3,5,8,9]},{"term_id":"GO:0016874","term_label":"ligase activity","supporting_discovery_ids":[2,3,5,8]},{"term_id":"GO:0042393","term_label":"histone binding","supporting_discovery_ids":[0]}],"localization":[{"term_id":"GO:0005777","term_label":"peroxisome","supporting_discovery_ids":[1,3]},{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[6,7,8,9]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[5]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[5]},{"term_id":"GO:0005764","term_label":"lysosome","supporting_discovery_ids":[4]}],"pathway":[{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[6,7,8,9]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[5,10,15]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[4]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[2,3]}],"complexes":["PRC1/PRC2 (co-occupancy at target promoters)"],"partners":["PEX5","NEMO","TRAF6","TRAF2","CENTROBIN","MTOR","RRAGB","CEP192"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O94972","full_name":"E3 ubiquitin-protein ligase TRIM37","aliases":["Mulibrey nanism protein","RING-type E3 ubiquitin transferase TRIM37","Tripartite motif-containing protein 37"],"length_aa":964,"mass_kda":107.9,"function":"E3 ubiquitin-protein ligase required to prevent centriole reduplication (PubMed:15885686, PubMed:23769972). Probably acts by ubiquitinating positive regulators of centriole reduplication (PubMed:23769972). Mediates monoubiquitination of 'Lys-119' of histone H2A (H2AK119Ub), a specific tag for epigenetic transcriptional repression: associates with some Polycomb group (PcG) multiprotein PRC2-like complex and mediates repression of target genes (PubMed:25470042). Also acts as a positive regulator of peroxisome import by mediating monoubiquitination of PEX5 at 'Lys-472': monoubiquitination promotes PEX5 stabilitation by preventing its polyubiquitination and degradation by the proteasome (PubMed:28724525). 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elegans.","date":"2012","source":"Radiation research","url":"https://pubmed.ncbi.nlm.nih.gov/22967128","citation_count":12,"is_preprint":false},{"pmid":"11578880","id":"PMC_11578880","title":"Expression of MUL, a gene encoding a novel RBCC family ring-finger protein, in human and mouse embryogenesis.","date":"2001","source":"Mechanisms of development","url":"https://pubmed.ncbi.nlm.nih.gov/11578880","citation_count":12,"is_preprint":false},{"pmid":"21849285","id":"PMC_21849285","title":"A randomized trial of punctuated antiretroviral therapy in Ugandan HIV-seropositive adults with pulmonary tuberculosis and CD4⁺ T-cell counts of ≥ 350 cells/μL.","date":"2011","source":"The Journal of infectious diseases","url":"https://pubmed.ncbi.nlm.nih.gov/21849285","citation_count":12,"is_preprint":false},{"pmid":"29894509","id":"PMC_29894509","title":"Cryptococcal antigen positivity combined with the percentage of HIV-seropositive samples with CD4 counts <100 cells/μl identifies districts in South 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ligase that mono-ubiquitinates histone H2A (a chromatin modification associated with transcriptional repression). In 17q23-amplified breast cancer cells, TRIM37 associates with polycomb repressive complex 2 (PRC2), and together with PRC2 and PRC1 co-occupies target gene promoters to silence them. RNAi-mediated knockdown of TRIM37 results in loss of ubiquitinated H2A, dissociation of PRC1 and PRC2 from target promoters, and transcriptional reactivation of silenced genes including tumor suppressors.\",\n      \"method\": \"In vitro ubiquitin ligase assay, genome-wide ChIP-chip, RNA interference knockdown, co-immunoprecipitation, mouse xenograft tumor growth assay\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — multiple orthogonal methods (in vitro ubiquitination assay, ChIP-chip, Co-IP, RNAi with defined phenotypic readout) in a single rigorous study published in Nature\",\n      \"pmids\": [\"25470042\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"TRIM37 protein localizes to peroxisomes, as demonstrated by colocalization with peroxisomal markers in transfected cells and endogenous staining in HepG2 and intestinal smooth muscle cell lines. Peroxisomal localization requires PEX1 and PEX5 but not PEX7, as TRIM37 fails to import into peroxisomes in PEX1(-/-) and PEX5(-/-) mutant fibroblasts. A major Finnish disease-associated mutation abrogates peroxisomal localization, classifying mulibrey nanism as a peroxisomal disorder.\",\n      \"method\": \"Immunofluorescence colocalization with peroxisomal markers, transfection of mutant constructs, analysis in peroxin-deficient fibroblasts (PEX1-/-, PEX5-/-, PEX7-/- cells), immunohistochemistry\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal approaches (colocalization, genetic complementation in peroxin-deficient cells, mutant protein analysis), replicated in multiple cell lines\",\n      \"pmids\": [\"11938494\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"TRIM37 possesses RING-domain-dependent E3 ubiquitin ligase activity. Full-length TRIM37 and its TRIM domain undergo polyubiquitination when co-expressed with ubiquitin; bacterially produced GST-TRIM domain is polyubiquitinated in cell-free conditions. This activity is abolished by RING-domain mutation (Cys35Ser;Cys36Ser) and by the disease-associated missense mutation Leu76Pro. Ectopically expressed TRIM37 forms ubiquitin-, proteasome-, and chaperone-positive aggresomes; RING-mutant and patient-mutant proteins are markedly less prone to aggregation.\",\n      \"method\": \"Cell-free ubiquitination assay with bacterially produced GST-TRIM domain, co-expression with ubiquitin in cells, RING-domain mutagenesis (Cys35Ser;Cys36Ser), immunofluorescence analysis of aggresomes, yeast two-hybrid identification of ubiquitin as binding partner\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro cell-free ubiquitination assay with active-site mutagenesis, multiple orthogonal methods in one study\",\n      \"pmids\": [\"15885686\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"TRIM37 localizes to peroxisomal membranes and ubiquitylates PEX5 at lysine 464 (K464) by interacting with the C-terminal 51 amino acids (CT51) of PEX5. This ubiquitylation stabilizes PEX5 by preventing its proteasomal degradation, thereby promoting PTS protein import into peroxisomes. PEX5 mutations K464A or ΔCT51, or TRIM37 depletion/mutation, reduce PEX5 abundance and impair its cargo-binding and import functions. TRIM37 or PEX5 depletion induces apoptosis and enhances oxidative stress sensitivity.\",\n      \"method\": \"Co-immunoprecipitation, site-directed mutagenesis (K464A, ΔCT51), protein stability assay, peroxisomal import assay, RNAi knockdown, apoptosis assay, immunofluorescence localization\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — reciprocal Co-IP, site-directed mutagenesis identifying specific ubiquitylation site, functional import assay, multiple orthogonal methods in one rigorous study\",\n      \"pmids\": [\"28724525\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TRIM37 interacts with MTOR and RRAGB proteins, enhances the MTOR-RRAGB interaction, and promotes lysosomal localization of MTOR, thereby activating amino acid-stimulated MTORC1 signaling. Loss of TRIM37 function reduces TFEB phosphorylation, causing TFEB nuclear translocation and transcriptional activation of lysosome biogenesis and autophagy genes. Enhanced autophagy upon TRIM37 loss depends on MTORC1 inhibition.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37 with MTOR and RRAGB), immunofluorescence (lysosomal MTOR localization), western blotting (TFEB phosphorylation), RNAi knockdown, autophagy flux assays\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP interactions identified, functional readouts with knockdown, single lab but two orthogonal methods\",\n      \"pmids\": [\"29940807\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"In response to genotoxic stress, ATM kinase phosphorylates TRIM37 in the cytoplasm, inducing its nuclear translocation. In the nucleus, TRIM37 forms a complex with NEMO and TRAF6 via a TRAF6-binding motif (TBM) and monoubiquitinates NEMO at K309, driving nuclear export of NEMO and subsequent IKK/NF-κB activation. A cell-penetrating TAT-TBM peptide that blocks this complex abrogates genotoxic NF-κB activation and sensitizes cancer cells to cisplatin.\",\n      \"method\": \"Co-immunoprecipitation, in vitro ubiquitination assay (monoubiquitination of NEMO K309), immunofluorescence (nuclear translocation), ATM kinase assay, TAT-TBM peptide inhibitor experiments, mutation of TRAF6-binding motif, xenograft in vivo experiments\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — multiple orthogonal methods (in vitro ubiquitination, kinase assay, Co-IP, mutagenesis, peptide inhibitor) in one rigorous study\",\n      \"pmids\": [\"30254148\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TRIM37 levels determine cellular vulnerability to PLK4 inhibition. High TRIM37 levels inhibit acentrosomal spindle assembly by promoting degradation of the centrosomal component CEP192, leading to mitotic failure when centrosomes are depleted. Low TRIM37 levels permit PLK4 to self-assemble into centrosome-independent condensates that serve as ectopic microtubule-organizing centres, enabling acentrosomal mitosis. Chr17q amplification (containing TRIM37) renders neuroblastoma and breast cancer cells highly sensitive to PLK4 inhibition.\",\n      \"method\": \"TRIM37 overexpression and knockdown with mitotic outcome assays, immunofluorescence, PLK4 inhibitor treatment, TRIM37-directed degradation of CEP192 assay, analysis of PLK4 condensate formation\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — loss-of-function and gain-of-function with defined mechanistic readouts (CEP192 degradation, PLK4 condensate formation), published in Nature with extensive controls\",\n      \"pmids\": [\"32908304\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TRIM37 overexpression acts as a negative regulator of centrosomal pericentriolar material (PCM). In cells lacking centrosomes (after PLK4 inhibition), elevated TRIM37 blocks the formation of PCM foci that are required for acentrosomal spindle assembly and successful cell division. Overexpression of TRIM37 also delays centrosome maturation and separation at mitotic entry, increasing the frequency of mitotic errors and causing genomic instability.\",\n      \"method\": \"PLK4 inhibitor-induced centrosome depletion, TRIM37 overexpression/knockdown, immunofluorescence of PCM foci, mitotic timing assays, chromosome segregation analysis, live-cell imaging\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — two independent Nature papers (PMIDs 32908304 and 32908313) using orthogonal methods consistently establishing the same mechanism\",\n      \"pmids\": [\"32908313\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TRIM37 prevents the formation of centriolar protein assemblies (Cenpas) by regulating the stability and solubility of Centrobin. TRIM37 depletion causes Centrobin to accumulate in elongated entities that seed Cenpas formation; these Cenpas can act as microtubule-organizing centres. Cenpas formation upon TRIM37 depletion requires PLK4 and two parallel pathways relying on Centrobin and PLK1, respectively. TRIM37 interacts with and ubiquitinates Centrobin. Mulibrey patient-derived cells harbor these Centrobin condensate-organized ectopic poles.\",\n      \"method\": \"TRIM37 depletion, immunofluorescence, correlative light-electron microscopy, PLK4/PLK1/Centrobin epistasis analysis (double knockdown), Co-IP and ubiquitination assay of Centrobin, analysis of patient-derived cells\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — genetic epistasis, Co-IP/ubiquitination, CLEM, patient-derived cell validation, multiple orthogonal methods in one study\",\n      \"pmids\": [\"33491649\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TRIM37 prevents assembly of a centrobin-scaffolded structured condensate that buds off centrosomes and organizes ectopic spindle poles. In ~25% of TRIM37-deficient cells, the condensate recruits centrosomal proteins and acquires microtubule nucleation capacity during mitotic entry, causing transient multipolarity and multipolar segregation. Centrobin interacts with and is ubiquitinated by TRIM37. Removing Centrobin suppresses ectopic spindle pole formation and multipolar segregation in TRIM37-deficient cells.\",\n      \"method\": \"TRIM37 KO cell lines, live-cell imaging, immunofluorescence, structured illumination microscopy, Co-IP and ubiquitination assay (TRIM37-Centrobin), Centrobin knockdown epistasis, chromosome segregation assays, patient-derived cell analysis\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — ubiquitination assay with substrate identification, genetic epistasis, live imaging, multiple orthogonal methods; consistent with independent eLife paper (PMID 33491649)\",\n      \"pmids\": [\"33983387\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TRIM37 promotes K63-linked polyubiquitination of TRAF2, sustaining activation of the NF-κB pathway in non-small-cell lung cancer. Mutation of the RING finger domain of TRIM37 abolishes its ability to promote K63 polyubiquitination of TRAF2 and NF-κB activation. TRIM37 binds to TRAF2 as demonstrated by co-immunoprecipitation.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-TRAF2), in vitro/cellular ubiquitination assay, RING-domain mutagenesis, NF-κB luciferase reporter, overexpression and RNAi knockdown with apoptosis/proliferation readouts\",\n      \"journal\": \"The Journal of pathology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP and ubiquitination assay with RING mutagenesis, single lab, two orthogonal methods\",\n      \"pmids\": [\"30043491\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TRIM37-directed histone H2A monoubiquitination enforces changes in DNA repair that render TP53-mutant triple-negative breast cancer cells resistant to chemotherapy. A positive feedback loop via ATM/E2F1/STAT signaling amplifies the TRIM37 network in chemoresistant cells. TRIM37 inhibition using antisense oligonucleotides conjugated to antifolate receptor 1 nanoparticles reduces lung metastasis in vivo.\",\n      \"method\": \"RNAi knockdown, TRIM37-specific antisense oligonucleotide nanoparticles, H2A ubiquitination assay, spontaneous metastatic murine models, transcriptomic analysis, ATM/E2F1/STAT pathway analysis\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — H2A ubiquitination assay, in vivo model, pathway analysis with knockdown; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"32855208\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TRIM37 mediates K48-linked ubiquitination and proteasomal degradation of PTEN, activating the AKT-GSK-3β-β-catenin signaling pathway in pancreatic cancer cells to sustain stemness and chemoresistance.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-PTEN), ubiquitination assay (K48-linked), protein stability assay, immunofluorescence, RNAi knockdown, mouse xenograft\",\n      \"journal\": \"Frontiers in oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ubiquitination and degradation assay, in vivo model; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"33194618\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"TRIM37 stimulates K63-chain-linked ubiquitination of the transcription factor AP-2γ, promoting AP-2γ translocation from the cytoplasm to the nucleus and facilitating AP-2γ chromatin binding and transcriptional activity in breast cancer cells.\",\n      \"method\": \"Proteomics/mass spectrometry to identify TRIM37-AP-2γ interaction, Co-immunoprecipitation, ubiquitination assay (K63-linked), immunofluorescence (AP-2γ localization), ChIP-seq (AP-2γ chromatin binding), RNAi knockdown with transcriptional readouts\",\n      \"journal\": \"International journal of biological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — MS-identified interaction, Co-IP, K63 ubiquitination assay, ChIP-seq, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"35864973\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"TRIM37 directly interacts with the tumor suppressor P53 protein and promotes its K48-linked ubiquitination and proteasomal degradation, thereby activating aerobic glycolysis and promoting hepatocellular carcinoma progression. Knockdown of P53 reverses the effects of TRIM37 knockdown on HCC cell growth and metastasis.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-P53), ubiquitination assay, protein stability assay, glycolysis assays (lactate, glucose, ATP), functional cell assays, P53 knockdown epistasis, mouse xenograft\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ubiquitination assay, genetic epistasis; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"36252649\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TRIM37 promotes K63-linked ubiquitination of TRAF6, facilitating NF-κB pathway activation. In the context of virus infection, TRIM37 positively regulates inflammatory responses; TRIM37 knockout reduces proinflammatory cytokine levels in bone marrow-derived macrophages and inhibits immune responses in H1N1-infected mice. Direct interaction between TRIM37 and TRAF6 was demonstrated by immunoprecipitation.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-TRAF6), K63 ubiquitination assay, TRIM37 knockout mice, ELISA (cytokines), flow cytometry, H&E staining, western blotting\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, K63 ubiquitination assay, TRIM37-KO mouse model; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"33839419\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TRIM37 physically interacts with SMAD7 and promotes its ubiquitination-mediated proteasomal degradation, thereby enabling TGF-β signaling-dependent hepatic fibrosis. NF-κB activation mediated by ROS is necessary for transcriptional induction of TRIM37 during HBV infection.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-SMAD7), ubiquitination/degradation assay, RNAi knockdown, mouse fibrosis model, NF-κB reporter, ROS inhibitor treatment\",\n      \"journal\": \"Molecular therapy. Nucleic acids\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ubiquitination assay, in vivo mouse model; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"32916597\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"TRIM37 promotes Wnt/β-catenin signaling in gallbladder cancer by ubiquitinating Axin1, leading to Axin1 degradation and subsequent β-catenin stabilization and activation.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-Axin1), ubiquitination assay, protein stability assay, RNAi knockdown, in vitro and in vivo functional assays\",\n      \"journal\": \"Translational oncology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — Co-IP and ubiquitination assay reported, single lab, single publication, limited mechanistic follow-up details in abstract\",\n      \"pmids\": [\"37379772\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"TRIM37 directly interacts with TRAF6 and promotes K63-linked ubiquitination of TRAF6, leading to IKKβ phosphorylation. Additionally, TRIM37 enhances translocation of IKKγ (NEMO) from the nucleus to the cytoplasm, stabilizing the cytoplasmic IKK complex and prolonging NF-κB-driven inflammation during hepatic ischemia/reperfusion injury.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-TRAF6), immunofluorescence (IKKγ translocation), western blotting (subcellular fractionation), IKK inhibitor rescue experiments, in vivo 70% hepatic I/R model\",\n      \"journal\": \"Molecular medicine (Cambridge, Mass.)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, immunofluorescence localization with functional consequence, in vivo model; single lab\",\n      \"pmids\": [\"37158850\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"During PM-induced autophagy in lung epithelial cells, TRIM37 is itself degraded via autophagy. This degradation of TRIM37 protects TRAF6 from proteasomal degradation, increasing TRAF6 levels and thereby driving NF-κB-dependent chemokine production that recruits neutrophils and promotes pre-metastatic niche formation.\",\n      \"method\": \"RNAi knockdown of TRIM37 and TRAF6, autophagy inhibition (hydroxychloroquine), ROS blockade, immunofluorescence, in vitro and in vivo lung metastasis models\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis (TRIM37 autophagy degradation protects TRAF6), in vivo model, multiple orthogonal methods; single lab\",\n      \"pmids\": [\"34524943\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Trim37 knockout mice recapitulate several features of human mulibrey nanism including infertility (germ cell aplasia, Leydig cell hyperplasia, lipid accumulation), elevated FSH/LH, elevated fasting blood glucose, non-compaction cardiomyopathy, hepatomegaly, fatty liver, and tumor formation. Liver peroxisome amount and morphology appeared normal in Trim37-/- mice.\",\n      \"method\": \"Trim37 knockout mouse model, CT scan (skeletal parameters), histology, hormone assays, glucose/insulin measurements, autopsy/tumor analysis, electron microscopy of peroxisomes\",\n      \"journal\": \"Biology open\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean KO mouse model with defined multi-organ phenotypic readouts; single lab\",\n      \"pmids\": [\"27044324\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"TRIM37 mutations affecting the B-box domain (p.Cys109Ser) and the TRAF domain (p.Glu271_Ser287del in-frame deletion) both alter the subcellular localization of TRIM37, suggesting that both the B-box and TRAF domains are important for TRIM37 protein-protein interactions and proper peroxisomal targeting.\",\n      \"method\": \"Immunofluorescence of transfected mutant constructs to assess subcellular localization\",\n      \"journal\": \"Clinical genetics\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single method (immunofluorescence of localization), single case study, no functional follow-up\",\n      \"pmids\": [\"17100991\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"TRIM37 activates Wnt/β-catenin signaling in hepatocellular carcinoma by interacting with β-catenin and activating the transcriptional activity of the β-catenin/TCF complex, as well as expression of downstream target genes. This activation promotes EMT, cell migration, and metastasis.\",\n      \"method\": \"Co-immunoprecipitation (TRIM37-β-catenin), dual-luciferase reporter assay (β-catenin/TCF transcriptional activity), RNAi knockdown and overexpression, in vivo metastasis assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — Co-IP and luciferase reporter, single lab, limited mechanistic depth on ubiquitination substrate\",\n      \"pmids\": [\"26208456\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"PBK kinase directly interacts with TRIM37 and promotes its phosphorylation and nuclear translocation, which subsequently activates the NF-κB pathway to confer olaparib (PARP inhibitor) resistance in ovarian cancer cells.\",\n      \"method\": \"Co-immunoprecipitation (PBK-TRIM37), immunofluorescence (nuclear translocation), PBK inhibitor treatment, RNAi knockdown, in vitro and in vivo resistance assays\",\n      \"journal\": \"Experimental & molecular medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — Co-IP, single lab, limited mechanistic follow-up details available from abstract\",\n      \"pmids\": [\"35859118\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"ASB16-AS1 lncRNA cooperates with ATM serine/threonine kinase to induce TRIM37 phosphorylation (post-translational modification), activating the NF-κB pathway in gastric cancer cells.\",\n      \"method\": \"Co-immunoprecipitation, RNA immunoprecipitation (RIP), luciferase reporter assay, pulldown assay\",\n      \"journal\": \"Gastric cancer\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — phosphorylation inferred from Co-IP and functional assays, single lab, abstract-level description insufficient to confirm direct kinase assay\",\n      \"pmids\": [\"32572790\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TRIM37 orchestrates TGF-β1 signaling activation in renal cell carcinoma through direct mediation of histone H2A ubiquitination modifications, thereby promoting EMT and malignant progression.\",\n      \"method\": \"RNAi knockdown and overexpression, ubiquitination assay (H2A), TGF-β1 pathway analysis, interactive network analysis, in vitro and in vivo functional assays\",\n      \"journal\": \"Journal of experimental & clinical cancer research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — ubiquitination assay and pathway analysis, single lab, limited mechanistic detail in abstract\",\n      \"pmids\": [\"34130705\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"TRIM37 is an E3 ubiquitin ligase (RING-finger-dependent) with multiple established substrates: it mono-ubiquitinates histone H2A to repress transcription in concert with PRC2/PRC1 complexes; ubiquitinates PEX5 at K464 to stabilize it and promote peroxisomal matrix protein import; ubiquitinates Centrobin to prevent its condensation into ectopic microtubule-organizing centres; monoubiquitinates NEMO at K309 (triggered by ATM-mediated phosphorylation of TRIM37) to drive nuclear-to-cytoplasmic NF-κB signaling; and promotes K63-linked ubiquitination of TRAF2 and TRAF6 to activate NF-κB; at centrosomes, TRIM37 prevents PLK4 from forming condensate-based ectopic spindle poles and targets CEP192 for degradation to control centrosome maturation, with levels of TRIM37 being a key determinant of sensitivity to PLK4 inhibition; additionally, TRIM37 positively regulates MTORC1 signaling by enhancing the MTOR-RRAGB interaction and lysosomal MTOR localization, suppressing autophagy via the TFEB axis.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"TRIM37 is a RING-domain E3 ubiquitin ligase whose catalytic activity is essential for its diverse cellular roles, abolished by RING mutation and by disease-associated point mutations [#2]. Through monoubiquitination of histone H2A, it acts as a transcriptional repressor that cooperates with PRC1 and PRC2 to co-occupy and silence target promoters, including tumor suppressor genes in 17q23-amplified breast cancer [#0]. At the centrosome, TRIM37 is a key safeguard of mitotic fidelity: it ubiquitinates and limits Centrobin to prevent its condensation into ectopic, microtubule-nucleating centriolar assemblies, and it targets CEP192 for degradation while restraining PLK4 condensate-based ectopic spindle poles—activities that make TRIM37 levels (elevated by chr17q amplification) a determinant of sensitivity to PLK4 inhibition [#6, #8, #9]. TRIM37 also localizes to peroxisomal membranes in a PEX1/PEX5-dependent manner, where it ubiquitinates PEX5 at K464 to stabilize it and promote peroxisomal matrix protein import [#1, #3]. In genotoxic stress signaling, ATM phosphorylates TRIM37 to drive its nuclear translocation, where it monoubiquitinates NEMO at K309 within a TRAF6-containing complex to trigger nuclear export of NEMO and IKK/NF-\\u03baB activation [#5]. TRIM37 further activates NF-\\u03baB through K63-linked ubiquitination of TRAF2 and TRAF6 [#10, #15], and positively regulates MTORC1 by enhancing the MTOR–RRAGB interaction and lysosomal MTOR localization, thereby suppressing TFEB-driven autophagy [#4]. Germline loss-of-function in TRIM37 causes mulibrey nanism, and Trim37-knockout mice recapitulate multi-organ disease features including infertility, cardiomyopathy, and metabolic abnormalities [#1, #20].\",\n  \"teleology\": [\n    {\n      \"year\": 2002,\n      \"claim\": \"Established where TRIM37 acts in the cell and tied its localization to disease, showing peroxisomal targeting depends on the import machinery and is lost in a major disease mutation.\",\n      \"evidence\": \"Immunofluorescence colocalization and complementation in PEX1-/-, PEX5-/-, PEX7-/- fibroblasts, with disease-mutant constructs\",\n      \"pmids\": [\"11938494\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define the molecular activity of TRIM37 at peroxisomes\", \"No substrate identified at this stage\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Defined TRIM37 as a bona fide RING-dependent E3 ubiquitin ligase and showed disease mutations cripple its catalytic/folding properties, supplying the enzymatic basis for all later substrate work.\",\n      \"evidence\": \"Cell-free ubiquitination with GST-TRIM domain, RING mutagenesis (C35S;C36S), aggresome imaging, yeast two-hybrid\",\n      \"pmids\": [\"15885686\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No physiological substrate identified\", \"Autoubiquitination shown but chain linkage and cellular consequence undefined\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identified the first substrate-level chromatin function: TRIM37 monoubiquitinates H2A and partners with PRC1/PRC2 to silence tumor suppressors, explaining its oncogenic role in 17q23-amplified breast cancer.\",\n      \"evidence\": \"In vitro ubiquitination, genome-wide ChIP-chip, Co-IP, RNAi with transcriptional reactivation, xenografts\",\n      \"pmids\": [\"25470042\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of TRIM37 recruitment to specific promoters not resolved\", \"Direct biochemical interaction with PRC2 subunits not fully mapped\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Resolved how TRIM37 supports peroxisome function mechanistically: it ubiquitinates PEX5 at K464 to stabilize it and sustain matrix protein import, linking enzymatic activity to organelle homeostasis.\",\n      \"evidence\": \"Reciprocal Co-IP, site-directed mutagenesis (K464A, \\u0394CT51), import and protein-stability assays, apoptosis readouts\",\n      \"pmids\": [\"28724525\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Ubiquitin chain type on PEX5 stabilization not fully characterized\", \"Reconciliation with normal peroxisome morphology in Trim37-KO mice unexplained\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Connected TRIM37 to genotoxic NF-\\u03baB signaling, showing ATM phosphorylation drives nuclear TRIM37 to monoubiquitinate NEMO at K309 and trigger IKK activation, defining a druggable node for chemosensitization.\",\n      \"evidence\": \"Co-IP, in vitro ubiquitination of NEMO K309, ATM kinase assay, TBM mutagenesis, TAT-TBM peptide, xenografts\",\n      \"pmids\": [\"30254148\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of TRAF6/NEMO complex assembly unresolved\", \"Relationship to cytoplasmic TRAF-directed NF-\\u03baB activation not integrated\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Extended TRIM37 into nutrient signaling, showing it enhances MTOR-RRAGB interaction and lysosomal MTOR localization to activate MTORC1 and suppress TFEB-driven autophagy.\",\n      \"evidence\": \"Co-IP (MTOR, RRAGB), immunofluorescence of lysosomal MTOR, TFEB phosphorylation blots, autophagy flux assays\",\n      \"pmids\": [\"29940807\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether MTORC1 regulation requires TRIM37 ligase activity not established\", \"No direct ubiquitination substrate in this axis identified\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Broadened TRIM37's NF-\\u03baB role beyond NEMO by showing RING-dependent K63 ubiquitination of TRAF2 sustains pathway activation in lung cancer.\",\n      \"evidence\": \"Co-IP, ubiquitination assay, RING mutagenesis, NF-\\u03baB reporter, knockdown phenotypes\",\n      \"pmids\": [\"30043491\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"TRAF2 ubiquitination site not mapped\", \"Single lab without reciprocal validation\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Defined TRIM37 as a centrosomal gatekeeper whose levels dictate vulnerability to PLK4 inhibition by degrading CEP192 and restraining PLK4 condensates that drive acentrosomal mitosis.\",\n      \"evidence\": \"Two independent Nature studies: gain/loss-of-function with mitotic outcome assays, CEP192 degradation, PLK4 condensate and PCM foci imaging\",\n      \"pmids\": [\"32908304\", \"32908313\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ubiquitination of CEP192 vs. indirect regulation not fully separated\", \"Mechanism by which TRIM37 senses centrosome state unclear\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Pinpointed Centrobin as the centrosomal substrate whose TRIM37-dependent ubiquitination controls solubility, preventing condensate-scaffolded ectopic spindle poles seen in patient cells.\",\n      \"evidence\": \"Two studies: TRIM37 KO/depletion, CLEM/SIM imaging, Co-IP and ubiquitination of Centrobin, PLK4/PLK1/Centrobin epistasis, patient-derived cells\",\n      \"pmids\": [\"33491649\", \"33983387\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Ubiquitin chain linkage on Centrobin not defined\", \"Why only a subset of cells form ectopic poles unexplained\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Linked TRIM37 H2A ubiquitination to DNA-repair-driven chemoresistance in TP53-mutant breast cancer via an ATM/E2F1/STAT feedback loop, with therapeutic targeting in vivo.\",\n      \"evidence\": \"RNAi, antisense-oligonucleotide nanoparticles, H2A ubiquitination assay, metastasis models, transcriptomics\",\n      \"pmids\": [\"32855208\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs. indirect contribution of H2A ubiquitination to repair changes unresolved\", \"Feedback loop wiring not fully dissected\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"A wide array of additional reported substrates and signaling outputs (PTEN, P53, AP-2\\u03b3, Axin1, SMAD7, TRAF6) tie TRIM37 to Wnt/\\u03b2-catenin, glycolysis, TGF-\\u03b2 and inflammatory programs across cancers, but it remains unresolved which represent direct, generalizable activities versus context-specific or low-confidence observations.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Many substrate claims rest on single-lab Co-IP/ubiquitination without reciprocal or structural validation\", \"Ubiquitin chain types and modification sites largely unmapped\", \"Unifying logic that selects among TRIM37's many substrates in a given cell is unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016740\", \"supporting_discovery_ids\": [0, 2, 3, 5, 8, 9, 10, 15]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [0, 2, 3, 5, 8, 9]},\n      {\"term_id\": \"GO:0016874\", \"supporting_discovery_ids\": [2, 3, 5, 8]},\n      {\"term_id\": \"GO:0042393\", \"supporting_discovery_ids\": [0]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005777\", \"supporting_discovery_ids\": [1, 3]},\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [6, 7, 8, 9]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [5]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [5]},\n      {\"term_id\": \"GO:0005764\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [6, 7, 8, 9]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [5, 10, 15]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [2, 3]}\n    ],\n    \"complexes\": [\"PRC1/PRC2 (co-occupancy at target promoters)\"],\n    \"partners\": [\"PEX5\", \"NEMO\", \"TRAF6\", \"TRAF2\", \"Centrobin\", \"MTOR\", \"RRAGB\", \"CEP192\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}