{"gene":"TNFRSF19","run_date":"2026-06-10T10:51:55","timeline":{"discoveries":[{"year":2000,"finding":"TROY/TAJ activates the JNK pathway and induces caspase-independent apoptosis when overexpressed in mammalian cells; it interacts with TRAF family members via its cytoplasmic domain despite lacking a death domain.","method":"Overexpression in mammalian cells, co-immunoprecipitation with TRAF family members, JNK pathway reporter assays, caspase-independence demonstrated by inhibitor studies","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with TRAFs, functional reporter assays, and cell death assays in a single lab with multiple orthogonal methods","pmids":["10809768"],"is_preprint":false},{"year":2000,"finding":"TROY is a type I membrane protein with cysteine-rich motifs in its extracellular domain and a TRAF2-binding sequence in its cytoplasmic domain; overexpression of TROY induces NF-κB activation, which is inhibited by dominant-negative forms of TRAF2, TRAF5, and TRAF6.","method":"Signal sequence trap cloning, overexpression assays, dominant-negative TRAF constructs, NF-κB reporter assays","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — NF-κB reporter assays with dominant-negative TRAFs and overexpression, single lab, multiple functional readouts","pmids":["10764796"],"is_preprint":false},{"year":2004,"finding":"Overexpression of TAJ/TROY induces a non-apoptotic paraptosis-like cell death in 293T cells, characterized by cytoplasmic vacuolation, mitochondrial swelling, phosphatidylserine externalization, loss of mitochondrial transmembrane potential, and independence from caspase activation; PDCD5 overexpression enhances this TAJ/TROY-induced cell death, and endogenous PDCD5 is upregulated in response to TAJ/TROY overexpression.","method":"Overexpression in 293T cells, transmission electron microscopy, flow cytometry (PS externalization, mitochondrial potential), caspase inhibitor assays, clonogenic growth assays, Western blot","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Multiple orthogonal methods (TEM, flow cytometry, caspase inhibitors) in a single lab","pmids":["15020679"],"is_preprint":false},{"year":2005,"finding":"TROY forms a functional receptor complex with NgR1 (Nogo-66 receptor) and LINGO-1 to mediate neuronal responses to myelin inhibitors; dominant-negative TROY or soluble TROY protein blocks neuronal responses to myelin inhibitors.","method":"Co-immunoprecipitation, overexpression of dominant-negative TROY, soluble TROY protein treatment, neurite outgrowth assays","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 2 / Strong — Independently replicated in two simultaneous papers (PMIDs 15694321 and 15694322) using Co-IP, dominant-negative constructs, and functional neurite outgrowth assays","pmids":["15694321"],"is_preprint":false},{"year":2005,"finding":"TAJ/TROY binds NgR1 and can replace p75 in the p75/NgR1/LINGO-1 complex to activate RhoA in the presence of myelin inhibitors; neurons from Taj-deficient mice are more resistant to myelin inhibitor-mediated suppression of neurite outgrowth.","method":"Binding assays, co-immunoprecipitation, RhoA activation assay, Taj knockout mouse neurons, neurite outgrowth inhibition assays","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 2 / Strong — Replicated across two independent labs (PMIDs 15694321 and 15694322) with Co-IP, RhoA activation, and genetic loss-of-function","pmids":["15694322"],"is_preprint":false},{"year":2007,"finding":"Lymphotoxin-alpha (LTα) is a functional ligand of TROY; LTα (but not LTβ or LTα/LTβ combinations) binds TROY by immunoprecipitation, and co-transfection of LTα with TROY sharply upregulates NF-κB reporter transcription in a dose-dependent manner.","method":"Immunoprecipitation, NF-κB reporter co-transfection assays, recombinant LTα treatment","journal":"Cell cycle (Georgetown, Tex.)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Three independent biochemical approaches (IP, reporter assay, recombinant protein) in a single lab","pmids":["18202551"],"is_preprint":false},{"year":2008,"finding":"Troy and Edar signaling pathways act redundantly to regulate initiation of hair follicle development; Troy single-null mice have no ectodermal organ defects, but Troy/Eda double-mutant mice lack secondary wave hair follicles and develop focal alopecia; the functional overlap operates through NF-κB-independent pathways.","method":"Troy null mouse generation, Eda/Troy double-mutant crosses, NF-κB transgenic reporter analysis, hair follicle morphology assessment","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — Genetic epistasis with double knockout mice and NF-κB reporter in vivo, rigorous controls","pmids":["18689798"],"is_preprint":false},{"year":2010,"finding":"TROY overexpression in glioma cells activates Rac1 signaling in a Pyk2-dependent manner to drive glioma cell invasion and migration; Pyk2 co-immunoprecipitates with TROY, and shRNA depletion of Pyk2 inhibits TROY-induced Rac1 activation and cellular migration.","method":"Co-immunoprecipitation (Pyk2 with TROY), Rac1 activation assay, shRNA knockdown of Pyk2, cell invasion/migration assays","journal":"Molecular cancer research : MCR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, Rac1 activation assay, and shRNA knockdown with functional readout in a single lab","pmids":["20881009"],"is_preprint":false},{"year":2010,"finding":"TNFRSF19 (transcript 2, TNFRSF19.2) is a direct target of canonical Wnt signaling in human mesenchymal stem cells; TNFRSF19 mediates Wnt-induced osteoblast differentiation and opposes adipogenesis; TNFRSF19 is negatively regulated by the adipogenic transcription factor C/EBP.","method":"Whole genome expression microarray, dual luciferase promoter assay, siRNA knockdown of TNFRSF19, overexpression in hMSC lines with differential LRP5 activity, alkaline phosphatase activity assay, adipogenesis assays","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Promoter reporter assay plus KD and OE with multiple differentiation readouts, single lab","pmids":["20223822"],"is_preprint":false},{"year":2012,"finding":"DR6/TNFRSF21 and TROY/TNFRSF19 interact physically and genetically to regulate CNS-specific angiogenesis; they are required for VEGF-mediated JNK activation and brain endothelial sprouting in vitro; both are downstream target genes of Wnt/β-catenin signaling in brain endothelium.","method":"Gene expression profiling, zebrafish and mouse in vivo vascular phenotyping, co-immunoprecipitation (DR6-TROY interaction), JNK activation assay, VEGF-stimulated sprouting assays, β-catenin overexpression in brain endothelium","journal":"Developmental cell","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Physical interaction by Co-IP plus genetic interaction and functional JNK assay, single lab","pmids":["22340501"],"is_preprint":false},{"year":2013,"finding":"TROY expression increases resistance of glioblastoma cells to IR- and TMZ-induced apoptosis via activation of Akt and NF-κB; inhibition of either Akt or NF-κB suppresses the survival benefits of TROY signaling; TROY knockdown in primary GBM xenografts significantly prolongs survival in vivo.","method":"TROY overexpression and knockdown, Akt and NF-κB pathway inhibitors, apoptosis assays, intracranial xenograft mouse model with survival analysis","journal":"Molecular cancer research : MCR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — In vivo xenograft model plus pathway inhibitor studies, single lab","pmids":["23699535"],"is_preprint":false},{"year":2013,"finding":"TROY interacts with RhoGDIα; two intracellular regions of TROY (amino acids 234–256 and 321–350) are required for this interaction; TROY/RhoGDIα association is potentiated by Nogo-66 and is independent of p75/RhoGDIα interaction; this association mediates TROY-dependent RhoA activation and neurite outgrowth inhibition.","method":"GST pull-down combined with 2D gel electrophoresis and mass spectrometry, co-immunoprecipitation in vitro and in vivo, deletion mutagenesis, RhoA activation assay, neurite outgrowth assays in p75-deficient neurons, TROY knockdown","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — GST pull-down with MS identification, confirmed by Co-IP, mutagenesis to map binding regions, and functional RhoA/neurite assays in one study","pmids":["24129566"],"is_preprint":false},{"year":2014,"finding":"TNFRSF19.2 is a β-catenin target gene in colorectal cancer cells; both TNFRSF19 isoforms activate NF-κB reporter activity; TNFRSF19.2 contains a TRAF-binding site that links it to NF-κB signaling, whereas isoform 1 lacks this site yet still induces NF-κB reporter activity.","method":"NF-κB reporter gene assays, β-catenin-dependent regulation assessed in colorectal cancer cell lines, isoform characterization, sequence analysis of TRAF-binding site","journal":"International journal of cancer","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — Reporter assays and isoform characterization, single lab; functional link to NF-κB established but upstream mechanistic details limited","pmids":["24623448"],"is_preprint":false},{"year":2014,"finding":"Pharmacological inhibition or RNAi knockdown of TROY promotes oligodendrocyte precursor cell (OPC) differentiation, whereas TROY overexpression dampens oligodendrocyte maturation; PKC signaling is mechanistically involved in TROY's inhibitory effects on OPC differentiation; TROY inhibition in transplanted OPCs enhances remyelination and neurological recovery after spinal cord injury.","method":"TROY inhibition (pharmacological and RNAi), overexpression, differentiation assays, PKC pathway analysis, co-culture myelination assays, in vivo OPC transplantation in SCI rat model","journal":"Stem cells and development","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Multiple functional assays including in vivo transplantation and PKC pathway identification, single lab","pmids":["24749558"],"is_preprint":false},{"year":2018,"finding":"TNFRSF19 binds the kinase domain of TGFβ receptor type I (TβRI) in the cytoplasm, blocking Smad2/3 association with TβRI and subsequent TGFβ signal transduction; TNFRSF19 overexpression confers resistance to TGFβ-induced cell-cycle arrest, and knockout of TNFRSF19 unleashes TGFβ signaling with upregulation of Smad2/3 phosphorylation and target gene transcription.","method":"Co-immunoprecipitation (TNFRSF19 with TβRI), domain mapping of interaction (kinase domain), Smad2/3 phosphorylation assay, TNFRSF19 overexpression and CRISPR knockout, TGFβ-responsive gene expression, cell-cycle assays","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — Reciprocal Co-IP with domain mapping, KO and OE with multiple orthogonal functional readouts (Smad phosphorylation, target genes, cell cycle) in a single rigorous study","pmids":["29735548"],"is_preprint":false},{"year":2018,"finding":"PDZ-RhoGEF is a binding partner of TROY that potentiates TROY-induced NF-κB activation; PDZ-RhoGEF also interacts with Pyk2, forming a signalsome with TROY and Pyk2; TROY expression stimulates Rho activation via PDZ-RhoGEF, and depletion of PDZ-RhoGEF reduces Rho activation and TROY-induced glioma cell migration.","method":"Co-immunoprecipitation (TROY with PDZ-RhoGEF, PDZ-RhoGEF with Pyk2), NF-κB reporter assay, Rho activation assay, PDZ-RhoGEF knockdown, cell migration assays, orthotopic xenograft survival","journal":"Neoplasia (New York, N.Y.)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Multiple Co-IPs, Rho assay, and functional migration assays, single lab","pmids":["30219706"],"is_preprint":false},{"year":2020,"finding":"TROY interacts with JAK1; increased TROY expression increases JAK1 phosphorylation and promotes STAT3 phosphorylation and STAT3 transcriptional activity in a JAK1-dependent manner; TROY-mediated STAT3 activation is independent of NF-κB; inhibition or knockdown of JAK1 (ruxolitinib or siRNA) inhibits TROY-induced STAT3 activation, GBM cell migration, and resistance to temozolomide.","method":"Co-immunoprecipitation (TROY with JAK1), phosphorylation assays (JAK1, STAT3), STAT3 reporter assay, siRNA knockdown of JAK1, ruxolitinib pharmacological inhibition, cell migration and temozolomide resistance assays","journal":"Neoplasia (New York, N.Y.)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP of novel TROY-JAK1 interaction, multiple functional assays including pharmacological and genetic inhibition, single lab","pmids":["32629176"],"is_preprint":false},{"year":2022,"finding":"In NAFLD-HCC, mutant β-catenin (CTNNB1 S45P) upregulates TNFRSF19 transcription; TNFRSF19 subsequently represses senescence-associated secretory phenotype (SASP)-like cytokines including IL-6 and CXCL8, contributing to immune exclusion; this axis can be reversed by the Wnt modulator ICG-001.","method":"ChIP-sequencing integrated with transcriptome and immune profiling, primary patient-derived culture with CTNNB1 S45P driver mutation, syngeneic immunocompetent mouse model, ICG-001 treatment","journal":"Journal of hepatology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP-seq plus transcriptome and functional in vivo syngeneic model, single lab","pmids":["35351523"],"is_preprint":false},{"year":2022,"finding":"TROY promotes HCC stemness by interacting with PI3K subunit p85α, inducing its polyubiquitylation and degradation, which activates PI3K/AKT/TBX3 signaling and upregulates pluripotency genes (SOX2, NANOG, OCT4) and promotes EMT; PI3K inhibitor wortmannin impairs this stemness pathway.","method":"Co-immunoprecipitation (TROY with p85α), Western blot for p85α ubiquitylation/degradation, AKT/TBX3 pathway analysis, spheroid/ALDH/apoptosis assays, double immunofluorescence","journal":"Journal of experimental & clinical cancer research : CR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with downstream pathway validation and functional stemness assays, single lab","pmids":["35610614"],"is_preprint":false},{"year":2012,"finding":"In microglia, TROY is upregulated in response to glioma cells and functions as a signaling molecule mediating microglial migration; Pyk2, Rac1, and pJNK are downstream signaling molecules of TROY in microglia; siRNA knockdown of TROY in microglia inhibits their migration toward glioma cells, similar to propentofylline treatment.","method":"Western blot, siRNA knockdown of TROY, Pyk2, Rac1 in microglia, microglial migration assay toward glioma cells","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — siRNA knockdown of multiple pathway components with functional migration readout, single lab","pmids":["22649568"],"is_preprint":false}],"current_model":"TNFRSF19/TROY is an orphan TNF receptor superfamily member that signals through multiple intracellular pathways depending on context: it recruits TRAF2/5/6 to activate NF-κB and JNK, forms a co-receptor complex with NgR1 and LINGO-1 (substituting for p75) to activate RhoA via RhoGDIα and inhibit axon regeneration, drives glioblastoma invasion and therapeutic resistance via a Pyk2–Rac1/PDZ-RhoGEF–Rho and JAK1–STAT3 signalsome, acts as a direct transcriptional target of Wnt/β-catenin signaling, inhibits TGFβ signaling by binding the TβRI kinase domain and blocking Smad2/3 association, and promotes cancer cell stemness by inducing p85α ubiquitylation and degradation to activate PI3K/AKT/TBX3."},"narrative":{"mechanistic_narrative":"TNFRSF19 (TROY/TAJ) is an orphan, death-domain-less type I membrane receptor of the TNF receptor superfamily that couples to divergent intracellular outputs through its cytoplasmic TRAF-binding sequence, activating NF-κB and JNK signaling [PMID:10809768, PMID:10764796]. In the nervous system it assembles a co-receptor complex with NgR1 and LINGO-1, substituting for p75 to transduce myelin-inhibitor signals into RhoA activation and suppression of neurite outgrowth, an effect that depends on its direct association with RhoGDIα via two mapped intracellular regions [PMID:15694321, PMID:15694322, PMID:24129566]; consistent with this, TROY restrains oligodendrocyte precursor differentiation and remyelination [PMID:24749558]. TNFRSF19 is a direct transcriptional target of canonical Wnt/β-catenin signaling that drives osteoblast over adipocyte differentiation in mesenchymal stem cells and regulates CNS angiogenesis together with DR6/TNFRSF21 [PMID:20223822, PMID:22340501]. In cancer it operates as a pro-tumorigenic signaling hub: it nucleates a Pyk2–Rac1/PDZ-RhoGEF–Rho and JAK1–STAT3 signalsome that drives glioblastoma invasion, migration, and resistance to irradiation and temozolomide via Akt and NF-κB [PMID:20881009, PMID:23699535, PMID:30219706, PMID:32629176], blocks TGFβ signaling by binding the TβRI kinase domain to prevent Smad2/3 association [PMID:29735548], and promotes hepatocellular carcinoma stemness by inducing p85α polyubiquitylation and degradation to activate PI3K/AKT/TBX3 [PMID:35610614]. A Wnt/β-catenin–TNFRSF19 axis additionally suppresses SASP cytokines such as IL-6 and CXCL8 to promote immune exclusion in NAFLD-driven HCC [PMID:35351523].","teleology":[{"year":2000,"claim":"Established that this orphan TNFRSF member signals despite lacking a death domain, defining TRAF recruitment as its proximal mechanism for NF-κB/JNK activation.","evidence":"Overexpression with co-IP of TRAF family members and NF-κB/JNK reporter assays with dominant-negative TRAF2/5/6 in mammalian cells","pmids":["10809768","10764796"],"confidence":"Medium","gaps":["Based on overexpression rather than endogenous receptor","No physiological ligand or stoichiometry of TRAF engagement defined"]},{"year":2004,"claim":"Characterized a non-apoptotic, caspase-independent paraptosis-like death program triggered by TROY and linked it to PDCD5, expanding the receptor's effector repertoire beyond NF-κB.","evidence":"Overexpression in 293T cells with TEM, flow cytometry, caspase inhibitors and PDCD5 co-expression","pmids":["15020679"],"confidence":"Medium","gaps":["Relies on overexpression; physiological relevance unclear","Mechanism linking TROY to PDCD5 not resolved"]},{"year":2005,"claim":"Identified a neuronal function: TROY substitutes for p75 in the NgR1/LINGO-1 complex to transduce myelin-inhibitor signals into RhoA activation, resolving why p75-negative neurons remain myelin-responsive.","evidence":"Co-IP, dominant-negative and soluble TROY, RhoA activation, and neurite outgrowth assays in wild-type and Taj-knockout neurons across two independent labs","pmids":["15694321","15694322"],"confidence":"High","gaps":["Intracellular effector linking TROY to RhoA not yet identified at this stage","Quantitative contribution relative to p75 in vivo unclear"]},{"year":2007,"claim":"Provided a candidate ligand by showing lymphotoxin-alpha binds TROY and drives NF-κB transcription, addressing the orphan status of the receptor.","evidence":"Immunoprecipitation, recombinant LTα, and NF-κB reporter co-transfection","pmids":["18202551"],"confidence":"Medium","gaps":["Single-lab binding/reporter evidence not independently confirmed","Physiological LTα–TROY signaling in vivo not demonstrated"]},{"year":2008,"claim":"Defined a developmental role in ectodermal organ formation, showing Troy acts redundantly with Eda/Edar to initiate hair follicle development through NF-κB-independent pathways.","evidence":"Troy-null and Eda/Troy double-mutant mice with NF-κB reporter and follicle morphology","pmids":["18689798"],"confidence":"High","gaps":["NF-κB-independent effector pathway not identified","Ligand driving Troy in skin not defined"]},{"year":2010,"claim":"Connected TROY to Wnt biology and to cancer invasion by establishing it as a direct β-catenin target controlling MSC differentiation and as a Pyk2-dependent activator of Rac1 driving glioma invasion.","evidence":"Promoter reporter, siRNA/overexpression with differentiation assays in hMSCs; co-IP, Rac1 assay, Pyk2 shRNA and invasion assays in glioma","pmids":["20223822","20881009"],"confidence":"Medium","gaps":["Whether differentiation and invasion roles share a common downstream node unknown","Pyk2-to-Rac1 GEF intermediary not yet identified in 2010"]},{"year":2012,"claim":"Extended TROY function to vascular and microglial contexts, showing it cooperates with DR6 for CNS angiogenesis and mediates glioma-induced microglial migration via Pyk2/Rac1/JNK.","evidence":"Co-IP (DR6-TROY), zebrafish/mouse vascular phenotyping, JNK/VEGF sprouting assays; microglial siRNA knockdown and migration assays","pmids":["22340501","22649568"],"confidence":"Medium","gaps":["Direct vs indirect role in endothelial JNK activation not separated","Ligand triggering TROY in microglia unknown"]},{"year":2013,"claim":"Demonstrated TROY drives glioblastoma therapeutic resistance and mapped its RhoA-activating effector by identifying RhoGDIα as a direct intracellular partner.","evidence":"TROY OE/KD with Akt/NF-κB inhibitors and xenograft survival; GST pull-down/MS, deletion mutagenesis, RhoA and neurite assays for RhoGDIα","pmids":["23699535","24129566"],"confidence":"High","gaps":["How RhoGDIα binding converts to RhoA activation mechanistically not fully defined","Link between resistance signaling and RhoGDIα axis not established"]},{"year":2014,"claim":"Clarified isoform-specific signaling and a neural regulatory role, showing TNFRSF19.2 is a β-catenin target with a TRAF-binding NF-κB linkage and that TROY suppresses oligodendrocyte differentiation via PKC.","evidence":"NF-κB reporter and isoform characterization in colorectal cells; pharmacological/RNAi TROY modulation with PKC analysis and in vivo OPC transplantation","pmids":["24623448","24749558"],"confidence":"Medium","gaps":["How isoform 1 activates NF-κB without a TRAF site unexplained","PKC connection to TROY mechanistically undefined"]},{"year":2018,"claim":"Revealed two new cancer mechanisms: direct inhibition of TGFβ signaling by binding the TβRI kinase domain, and assembly of a PDZ-RhoGEF/Pyk2 signalsome potentiating NF-κB and Rho-driven glioma migration.","evidence":"Reciprocal co-IP with domain mapping, Smad2/3 phosphorylation, CRISPR KO/OE, cell-cycle assays; co-IPs, Rho assay, PDZ-RhoGEF knockdown and xenograft survival","pmids":["29735548","30219706"],"confidence":"High","gaps":["Whether TGFβ inhibition requires ligand-engaged TROY unclear","Spatial organization of the TROY/Pyk2/PDZ-RhoGEF signalsome not resolved"]},{"year":2020,"claim":"Identified JAK1–STAT3 as an NF-κB-independent arm of TROY signaling driving GBM migration and temozolomide resistance, broadening the receptor's oncogenic output.","evidence":"Co-IP (TROY-JAK1), JAK1/STAT3 phosphorylation and reporter assays, JAK1 siRNA and ruxolitinib with migration/resistance readouts","pmids":["32629176"],"confidence":"Medium","gaps":["Direct vs scaffolded TROY-JAK1 contact not distinguished","Single-lab interaction without reciprocal in vivo confirmation"]},{"year":2022,"claim":"Established TROY as a downstream effector of oncogenic β-catenin in hepatocellular carcinoma that both promotes stemness via p85α degradation/PI3K-AKT-TBX3 and enforces immune exclusion by repressing SASP cytokines.","evidence":"ChIP-seq/transcriptome with CTNNB1 S45P models and ICG-001; co-IP, p85α ubiquitylation/degradation, AKT/TBX3 and stemness assays with wortmannin","pmids":["35351523","35610614"],"confidence":"Medium","gaps":["E3 ligase mediating p85α ubiquitylation not identified","Mechanism linking TROY to SASP cytokine repression undefined"]},{"year":null,"claim":"The authentic physiological ligand(s) and the rules governing which downstream pathway (NF-κB, JNK, RhoA, JAK1-STAT3, PI3K, TGFβ inhibition) TROY engages in a given cell type remain unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["LTα candidacy not independently validated as the physiological ligand","No structural basis for context-dependent effector selection","Reconciliation of pro-death versus pro-survival signaling lacking"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060089","term_label":"molecular transducer activity","supporting_discovery_ids":[0,1,3,4]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[14,18]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[11,15]}],"localization":[{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[1,3,4]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[14]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[0,1,14,16]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[7,10,17,18]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[6,8,9,13]}],"complexes":["NgR1/LINGO-1/TROY myelin co-receptor complex","TROY/Pyk2/PDZ-RhoGEF signalsome"],"partners":["NGFR","LINGO1","RTN4R","TRAF2","ARHGDIA","PTK2B","ARHGEF11","JAK1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9NS68","full_name":"Tumor necrosis factor receptor superfamily member 19","aliases":["TRADE","Toxicity and JNK inducer"],"length_aa":423,"mass_kda":46.0,"function":"Can mediate activation of JNK and NF-kappa-B. May promote caspase-independent cell death","subcellular_location":"Membrane","url":"https://www.uniprot.org/uniprotkb/Q9NS68/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/TNFRSF19","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/TNFRSF19","total_profiled":1310},"omim":[{"mim_id":"615885","title":"HYPOTRICHOSIS 12; HYPT12","url":"https://www.omim.org/entry/615885"},{"mim_id":"611211","title":"RECEPTOR EXPRESSED IN LYMPHOID TISSUES; RELT","url":"https://www.omim.org/entry/611211"},{"mim_id":"607107","title":"NASOPHARYNGEAL CARCINOMA","url":"https://www.omim.org/entry/607107"},{"mim_id":"606122","title":"TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY, MEMBER 19; TNFRSF19","url":"https://www.omim.org/entry/606122"},{"mim_id":"190198","title":"NOTCH RECEPTOR 1; NOTCH1","url":"https://www.omim.org/entry/190198"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Golgi apparatus","reliability":"Approved"},{"location":"Nucleoplasm","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"salivary gland","ntpm":52.1},{"tissue":"skin 1","ntpm":101.5}],"url":"https://www.proteinatlas.org/search/TNFRSF19"},"hgnc":{"alias_symbol":["TAJ-alpha","TROY","TAJ","TRADE"],"prev_symbol":[]},"alphafold":{"accession":"Q9NS68","domains":[{"cath_id":"2.10.50.10","chopping":"36-115","consensus_level":"medium","plddt":94.1391,"start":36,"end":115},{"cath_id":"-","chopping":"119-149","consensus_level":"medium","plddt":75.1803,"start":119,"end":149}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9NS68","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9NS68-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9NS68-F1-predicted_aligned_error_v6.png","plddt_mean":60.31},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=TNFRSF19","jax_strain_url":"https://www.jax.org/strain/search?query=TNFRSF19"},"sequence":{"accession":"Q9NS68","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9NS68.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9NS68/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9NS68"}},"corpus_meta":[{"pmid":"12615961","id":"PMC_12615961","title":"GSK-3: 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cells.","date":"2020","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/32102752","citation_count":12,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":41866,"output_tokens":5347,"usd":0.102902,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":13798,"output_tokens":4566,"usd":0.09157,"stage2_stop_reason":"end_turn"},"total_usd":0.194472,"stage1_batch_id":"msgbatch_017qqVz33Ga63SCDwzb35XPb","stage2_batch_id":"msgbatch_01Scr2Ei9x4HJMiRGxwrmvLK","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2000,\n      \"finding\": \"TROY/TAJ activates the JNK pathway and induces caspase-independent apoptosis when overexpressed in mammalian cells; it interacts with TRAF family members via its cytoplasmic domain despite lacking a death domain.\",\n      \"method\": \"Overexpression in mammalian cells, co-immunoprecipitation with TRAF family members, JNK pathway reporter assays, caspase-independence demonstrated by inhibitor studies\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with TRAFs, functional reporter assays, and cell death assays in a single lab with multiple orthogonal methods\",\n      \"pmids\": [\"10809768\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"TROY is a type I membrane protein with cysteine-rich motifs in its extracellular domain and a TRAF2-binding sequence in its cytoplasmic domain; overexpression of TROY induces NF-κB activation, which is inhibited by dominant-negative forms of TRAF2, TRAF5, and TRAF6.\",\n      \"method\": \"Signal sequence trap cloning, overexpression assays, dominant-negative TRAF constructs, NF-κB reporter assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — NF-κB reporter assays with dominant-negative TRAFs and overexpression, single lab, multiple functional readouts\",\n      \"pmids\": [\"10764796\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Overexpression of TAJ/TROY induces a non-apoptotic paraptosis-like cell death in 293T cells, characterized by cytoplasmic vacuolation, mitochondrial swelling, phosphatidylserine externalization, loss of mitochondrial transmembrane potential, and independence from caspase activation; PDCD5 overexpression enhances this TAJ/TROY-induced cell death, and endogenous PDCD5 is upregulated in response to TAJ/TROY overexpression.\",\n      \"method\": \"Overexpression in 293T cells, transmission electron microscopy, flow cytometry (PS externalization, mitochondrial potential), caspase inhibitor assays, clonogenic growth assays, Western blot\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Multiple orthogonal methods (TEM, flow cytometry, caspase inhibitors) in a single lab\",\n      \"pmids\": [\"15020679\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"TROY forms a functional receptor complex with NgR1 (Nogo-66 receptor) and LINGO-1 to mediate neuronal responses to myelin inhibitors; dominant-negative TROY or soluble TROY protein blocks neuronal responses to myelin inhibitors.\",\n      \"method\": \"Co-immunoprecipitation, overexpression of dominant-negative TROY, soluble TROY protein treatment, neurite outgrowth assays\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — Independently replicated in two simultaneous papers (PMIDs 15694321 and 15694322) using Co-IP, dominant-negative constructs, and functional neurite outgrowth assays\",\n      \"pmids\": [\"15694321\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"TAJ/TROY binds NgR1 and can replace p75 in the p75/NgR1/LINGO-1 complex to activate RhoA in the presence of myelin inhibitors; neurons from Taj-deficient mice are more resistant to myelin inhibitor-mediated suppression of neurite outgrowth.\",\n      \"method\": \"Binding assays, co-immunoprecipitation, RhoA activation assay, Taj knockout mouse neurons, neurite outgrowth inhibition assays\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — Replicated across two independent labs (PMIDs 15694321 and 15694322) with Co-IP, RhoA activation, and genetic loss-of-function\",\n      \"pmids\": [\"15694322\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Lymphotoxin-alpha (LTα) is a functional ligand of TROY; LTα (but not LTβ or LTα/LTβ combinations) binds TROY by immunoprecipitation, and co-transfection of LTα with TROY sharply upregulates NF-κB reporter transcription in a dose-dependent manner.\",\n      \"method\": \"Immunoprecipitation, NF-κB reporter co-transfection assays, recombinant LTα treatment\",\n      \"journal\": \"Cell cycle (Georgetown, Tex.)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Three independent biochemical approaches (IP, reporter assay, recombinant protein) in a single lab\",\n      \"pmids\": [\"18202551\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Troy and Edar signaling pathways act redundantly to regulate initiation of hair follicle development; Troy single-null mice have no ectodermal organ defects, but Troy/Eda double-mutant mice lack secondary wave hair follicles and develop focal alopecia; the functional overlap operates through NF-κB-independent pathways.\",\n      \"method\": \"Troy null mouse generation, Eda/Troy double-mutant crosses, NF-κB transgenic reporter analysis, hair follicle morphology assessment\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — Genetic epistasis with double knockout mice and NF-κB reporter in vivo, rigorous controls\",\n      \"pmids\": [\"18689798\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"TROY overexpression in glioma cells activates Rac1 signaling in a Pyk2-dependent manner to drive glioma cell invasion and migration; Pyk2 co-immunoprecipitates with TROY, and shRNA depletion of Pyk2 inhibits TROY-induced Rac1 activation and cellular migration.\",\n      \"method\": \"Co-immunoprecipitation (Pyk2 with TROY), Rac1 activation assay, shRNA knockdown of Pyk2, cell invasion/migration assays\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, Rac1 activation assay, and shRNA knockdown with functional readout in a single lab\",\n      \"pmids\": [\"20881009\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"TNFRSF19 (transcript 2, TNFRSF19.2) is a direct target of canonical Wnt signaling in human mesenchymal stem cells; TNFRSF19 mediates Wnt-induced osteoblast differentiation and opposes adipogenesis; TNFRSF19 is negatively regulated by the adipogenic transcription factor C/EBP.\",\n      \"method\": \"Whole genome expression microarray, dual luciferase promoter assay, siRNA knockdown of TNFRSF19, overexpression in hMSC lines with differential LRP5 activity, alkaline phosphatase activity assay, adipogenesis assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Promoter reporter assay plus KD and OE with multiple differentiation readouts, single lab\",\n      \"pmids\": [\"20223822\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"DR6/TNFRSF21 and TROY/TNFRSF19 interact physically and genetically to regulate CNS-specific angiogenesis; they are required for VEGF-mediated JNK activation and brain endothelial sprouting in vitro; both are downstream target genes of Wnt/β-catenin signaling in brain endothelium.\",\n      \"method\": \"Gene expression profiling, zebrafish and mouse in vivo vascular phenotyping, co-immunoprecipitation (DR6-TROY interaction), JNK activation assay, VEGF-stimulated sprouting assays, β-catenin overexpression in brain endothelium\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Physical interaction by Co-IP plus genetic interaction and functional JNK assay, single lab\",\n      \"pmids\": [\"22340501\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"TROY expression increases resistance of glioblastoma cells to IR- and TMZ-induced apoptosis via activation of Akt and NF-κB; inhibition of either Akt or NF-κB suppresses the survival benefits of TROY signaling; TROY knockdown in primary GBM xenografts significantly prolongs survival in vivo.\",\n      \"method\": \"TROY overexpression and knockdown, Akt and NF-κB pathway inhibitors, apoptosis assays, intracranial xenograft mouse model with survival analysis\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — In vivo xenograft model plus pathway inhibitor studies, single lab\",\n      \"pmids\": [\"23699535\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"TROY interacts with RhoGDIα; two intracellular regions of TROY (amino acids 234–256 and 321–350) are required for this interaction; TROY/RhoGDIα association is potentiated by Nogo-66 and is independent of p75/RhoGDIα interaction; this association mediates TROY-dependent RhoA activation and neurite outgrowth inhibition.\",\n      \"method\": \"GST pull-down combined with 2D gel electrophoresis and mass spectrometry, co-immunoprecipitation in vitro and in vivo, deletion mutagenesis, RhoA activation assay, neurite outgrowth assays in p75-deficient neurons, TROY knockdown\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — GST pull-down with MS identification, confirmed by Co-IP, mutagenesis to map binding regions, and functional RhoA/neurite assays in one study\",\n      \"pmids\": [\"24129566\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"TNFRSF19.2 is a β-catenin target gene in colorectal cancer cells; both TNFRSF19 isoforms activate NF-κB reporter activity; TNFRSF19.2 contains a TRAF-binding site that links it to NF-κB signaling, whereas isoform 1 lacks this site yet still induces NF-κB reporter activity.\",\n      \"method\": \"NF-κB reporter gene assays, β-catenin-dependent regulation assessed in colorectal cancer cell lines, isoform characterization, sequence analysis of TRAF-binding site\",\n      \"journal\": \"International journal of cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — Reporter assays and isoform characterization, single lab; functional link to NF-κB established but upstream mechanistic details limited\",\n      \"pmids\": [\"24623448\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Pharmacological inhibition or RNAi knockdown of TROY promotes oligodendrocyte precursor cell (OPC) differentiation, whereas TROY overexpression dampens oligodendrocyte maturation; PKC signaling is mechanistically involved in TROY's inhibitory effects on OPC differentiation; TROY inhibition in transplanted OPCs enhances remyelination and neurological recovery after spinal cord injury.\",\n      \"method\": \"TROY inhibition (pharmacological and RNAi), overexpression, differentiation assays, PKC pathway analysis, co-culture myelination assays, in vivo OPC transplantation in SCI rat model\",\n      \"journal\": \"Stem cells and development\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Multiple functional assays including in vivo transplantation and PKC pathway identification, single lab\",\n      \"pmids\": [\"24749558\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TNFRSF19 binds the kinase domain of TGFβ receptor type I (TβRI) in the cytoplasm, blocking Smad2/3 association with TβRI and subsequent TGFβ signal transduction; TNFRSF19 overexpression confers resistance to TGFβ-induced cell-cycle arrest, and knockout of TNFRSF19 unleashes TGFβ signaling with upregulation of Smad2/3 phosphorylation and target gene transcription.\",\n      \"method\": \"Co-immunoprecipitation (TNFRSF19 with TβRI), domain mapping of interaction (kinase domain), Smad2/3 phosphorylation assay, TNFRSF19 overexpression and CRISPR knockout, TGFβ-responsive gene expression, cell-cycle assays\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — Reciprocal Co-IP with domain mapping, KO and OE with multiple orthogonal functional readouts (Smad phosphorylation, target genes, cell cycle) in a single rigorous study\",\n      \"pmids\": [\"29735548\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"PDZ-RhoGEF is a binding partner of TROY that potentiates TROY-induced NF-κB activation; PDZ-RhoGEF also interacts with Pyk2, forming a signalsome with TROY and Pyk2; TROY expression stimulates Rho activation via PDZ-RhoGEF, and depletion of PDZ-RhoGEF reduces Rho activation and TROY-induced glioma cell migration.\",\n      \"method\": \"Co-immunoprecipitation (TROY with PDZ-RhoGEF, PDZ-RhoGEF with Pyk2), NF-κB reporter assay, Rho activation assay, PDZ-RhoGEF knockdown, cell migration assays, orthotopic xenograft survival\",\n      \"journal\": \"Neoplasia (New York, N.Y.)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Multiple Co-IPs, Rho assay, and functional migration assays, single lab\",\n      \"pmids\": [\"30219706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TROY interacts with JAK1; increased TROY expression increases JAK1 phosphorylation and promotes STAT3 phosphorylation and STAT3 transcriptional activity in a JAK1-dependent manner; TROY-mediated STAT3 activation is independent of NF-κB; inhibition or knockdown of JAK1 (ruxolitinib or siRNA) inhibits TROY-induced STAT3 activation, GBM cell migration, and resistance to temozolomide.\",\n      \"method\": \"Co-immunoprecipitation (TROY with JAK1), phosphorylation assays (JAK1, STAT3), STAT3 reporter assay, siRNA knockdown of JAK1, ruxolitinib pharmacological inhibition, cell migration and temozolomide resistance assays\",\n      \"journal\": \"Neoplasia (New York, N.Y.)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP of novel TROY-JAK1 interaction, multiple functional assays including pharmacological and genetic inhibition, single lab\",\n      \"pmids\": [\"32629176\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"In NAFLD-HCC, mutant β-catenin (CTNNB1 S45P) upregulates TNFRSF19 transcription; TNFRSF19 subsequently represses senescence-associated secretory phenotype (SASP)-like cytokines including IL-6 and CXCL8, contributing to immune exclusion; this axis can be reversed by the Wnt modulator ICG-001.\",\n      \"method\": \"ChIP-sequencing integrated with transcriptome and immune profiling, primary patient-derived culture with CTNNB1 S45P driver mutation, syngeneic immunocompetent mouse model, ICG-001 treatment\",\n      \"journal\": \"Journal of hepatology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP-seq plus transcriptome and functional in vivo syngeneic model, single lab\",\n      \"pmids\": [\"35351523\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"TROY promotes HCC stemness by interacting with PI3K subunit p85α, inducing its polyubiquitylation and degradation, which activates PI3K/AKT/TBX3 signaling and upregulates pluripotency genes (SOX2, NANOG, OCT4) and promotes EMT; PI3K inhibitor wortmannin impairs this stemness pathway.\",\n      \"method\": \"Co-immunoprecipitation (TROY with p85α), Western blot for p85α ubiquitylation/degradation, AKT/TBX3 pathway analysis, spheroid/ALDH/apoptosis assays, double immunofluorescence\",\n      \"journal\": \"Journal of experimental & clinical cancer research : CR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with downstream pathway validation and functional stemness assays, single lab\",\n      \"pmids\": [\"35610614\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"In microglia, TROY is upregulated in response to glioma cells and functions as a signaling molecule mediating microglial migration; Pyk2, Rac1, and pJNK are downstream signaling molecules of TROY in microglia; siRNA knockdown of TROY in microglia inhibits their migration toward glioma cells, similar to propentofylline treatment.\",\n      \"method\": \"Western blot, siRNA knockdown of TROY, Pyk2, Rac1 in microglia, microglial migration assay toward glioma cells\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — siRNA knockdown of multiple pathway components with functional migration readout, single lab\",\n      \"pmids\": [\"22649568\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"TNFRSF19/TROY is an orphan TNF receptor superfamily member that signals through multiple intracellular pathways depending on context: it recruits TRAF2/5/6 to activate NF-κB and JNK, forms a co-receptor complex with NgR1 and LINGO-1 (substituting for p75) to activate RhoA via RhoGDIα and inhibit axon regeneration, drives glioblastoma invasion and therapeutic resistance via a Pyk2–Rac1/PDZ-RhoGEF–Rho and JAK1–STAT3 signalsome, acts as a direct transcriptional target of Wnt/β-catenin signaling, inhibits TGFβ signaling by binding the TβRI kinase domain and blocking Smad2/3 association, and promotes cancer cell stemness by inducing p85α ubiquitylation and degradation to activate PI3K/AKT/TBX3.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"TNFRSF19 (TROY/TAJ) is an orphan, death-domain-less type I membrane receptor of the TNF receptor superfamily that couples to divergent intracellular outputs through its cytoplasmic TRAF-binding sequence, activating NF-\\u03baB and JNK signaling [#0, #1]. In the nervous system it assembles a co-receptor complex with NgR1 and LINGO-1, substituting for p75 to transduce myelin-inhibitor signals into RhoA activation and suppression of neurite outgrowth, an effect that depends on its direct association with RhoGDI\\u03b1 via two mapped intracellular regions [#3, #4, #11]; consistent with this, TROY restrains oligodendrocyte precursor differentiation and remyelination [#13]. TNFRSF19 is a direct transcriptional target of canonical Wnt/\\u03b2-catenin signaling that drives osteoblast over adipocyte differentiation in mesenchymal stem cells and regulates CNS angiogenesis together with DR6/TNFRSF21 [#8, #9]. In cancer it operates as a pro-tumorigenic signaling hub: it nucleates a Pyk2\\u2013Rac1/PDZ-RhoGEF\\u2013Rho and JAK1\\u2013STAT3 signalsome that drives glioblastoma invasion, migration, and resistance to irradiation and temozolomide via Akt and NF-\\u03baB [#7, #10, #15, #16], blocks TGF\\u03b2 signaling by binding the T\\u03b2RI kinase domain to prevent Smad2/3 association [#14], and promotes hepatocellular carcinoma stemness by inducing p85\\u03b1 polyubiquitylation and degradation to activate PI3K/AKT/TBX3 [#18]. A Wnt/\\u03b2-catenin\\u2013TNFRSF19 axis additionally suppresses SASP cytokines such as IL-6 and CXCL8 to promote immune exclusion in NAFLD-driven HCC [#17].\",\n  \"teleology\": [\n    {\n      \"year\": 2000,\n      \"claim\": \"Established that this orphan TNFRSF member signals despite lacking a death domain, defining TRAF recruitment as its proximal mechanism for NF-\\u03baB/JNK activation.\",\n      \"evidence\": \"Overexpression with co-IP of TRAF family members and NF-\\u03baB/JNK reporter assays with dominant-negative TRAF2/5/6 in mammalian cells\",\n      \"pmids\": [\"10809768\", \"10764796\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Based on overexpression rather than endogenous receptor\", \"No physiological ligand or stoichiometry of TRAF engagement defined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Characterized a non-apoptotic, caspase-independent paraptosis-like death program triggered by TROY and linked it to PDCD5, expanding the receptor's effector repertoire beyond NF-\\u03baB.\",\n      \"evidence\": \"Overexpression in 293T cells with TEM, flow cytometry, caspase inhibitors and PDCD5 co-expression\",\n      \"pmids\": [\"15020679\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Relies on overexpression; physiological relevance unclear\", \"Mechanism linking TROY to PDCD5 not resolved\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Identified a neuronal function: TROY substitutes for p75 in the NgR1/LINGO-1 complex to transduce myelin-inhibitor signals into RhoA activation, resolving why p75-negative neurons remain myelin-responsive.\",\n      \"evidence\": \"Co-IP, dominant-negative and soluble TROY, RhoA activation, and neurite outgrowth assays in wild-type and Taj-knockout neurons across two independent labs\",\n      \"pmids\": [\"15694321\", \"15694322\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Intracellular effector linking TROY to RhoA not yet identified at this stage\", \"Quantitative contribution relative to p75 in vivo unclear\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Provided a candidate ligand by showing lymphotoxin-alpha binds TROY and drives NF-\\u03baB transcription, addressing the orphan status of the receptor.\",\n      \"evidence\": \"Immunoprecipitation, recombinant LT\\u03b1, and NF-\\u03baB reporter co-transfection\",\n      \"pmids\": [\"18202551\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-lab binding/reporter evidence not independently confirmed\", \"Physiological LT\\u03b1\\u2013TROY signaling in vivo not demonstrated\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Defined a developmental role in ectodermal organ formation, showing Troy acts redundantly with Eda/Edar to initiate hair follicle development through NF-\\u03baB-independent pathways.\",\n      \"evidence\": \"Troy-null and Eda/Troy double-mutant mice with NF-\\u03baB reporter and follicle morphology\",\n      \"pmids\": [\"18689798\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"NF-\\u03baB-independent effector pathway not identified\", \"Ligand driving Troy in skin not defined\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Connected TROY to Wnt biology and to cancer invasion by establishing it as a direct \\u03b2-catenin target controlling MSC differentiation and as a Pyk2-dependent activator of Rac1 driving glioma invasion.\",\n      \"evidence\": \"Promoter reporter, siRNA/overexpression with differentiation assays in hMSCs; co-IP, Rac1 assay, Pyk2 shRNA and invasion assays in glioma\",\n      \"pmids\": [\"20223822\", \"20881009\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether differentiation and invasion roles share a common downstream node unknown\", \"Pyk2-to-Rac1 GEF intermediary not yet identified in 2010\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Extended TROY function to vascular and microglial contexts, showing it cooperates with DR6 for CNS angiogenesis and mediates glioma-induced microglial migration via Pyk2/Rac1/JNK.\",\n      \"evidence\": \"Co-IP (DR6-TROY), zebrafish/mouse vascular phenotyping, JNK/VEGF sprouting assays; microglial siRNA knockdown and migration assays\",\n      \"pmids\": [\"22340501\", \"22649568\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs indirect role in endothelial JNK activation not separated\", \"Ligand triggering TROY in microglia unknown\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Demonstrated TROY drives glioblastoma therapeutic resistance and mapped its RhoA-activating effector by identifying RhoGDI\\u03b1 as a direct intracellular partner.\",\n      \"evidence\": \"TROY OE/KD with Akt/NF-\\u03baB inhibitors and xenograft survival; GST pull-down/MS, deletion mutagenesis, RhoA and neurite assays for RhoGDI\\u03b1\",\n      \"pmids\": [\"23699535\", \"24129566\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How RhoGDI\\u03b1 binding converts to RhoA activation mechanistically not fully defined\", \"Link between resistance signaling and RhoGDI\\u03b1 axis not established\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Clarified isoform-specific signaling and a neural regulatory role, showing TNFRSF19.2 is a \\u03b2-catenin target with a TRAF-binding NF-\\u03baB linkage and that TROY suppresses oligodendrocyte differentiation via PKC.\",\n      \"evidence\": \"NF-\\u03baB reporter and isoform characterization in colorectal cells; pharmacological/RNAi TROY modulation with PKC analysis and in vivo OPC transplantation\",\n      \"pmids\": [\"24623448\", \"24749558\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How isoform 1 activates NF-\\u03baB without a TRAF site unexplained\", \"PKC connection to TROY mechanistically undefined\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Revealed two new cancer mechanisms: direct inhibition of TGF\\u03b2 signaling by binding the T\\u03b2RI kinase domain, and assembly of a PDZ-RhoGEF/Pyk2 signalsome potentiating NF-\\u03baB and Rho-driven glioma migration.\",\n      \"evidence\": \"Reciprocal co-IP with domain mapping, Smad2/3 phosphorylation, CRISPR KO/OE, cell-cycle assays; co-IPs, Rho assay, PDZ-RhoGEF knockdown and xenograft survival\",\n      \"pmids\": [\"29735548\", \"30219706\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether TGF\\u03b2 inhibition requires ligand-engaged TROY unclear\", \"Spatial organization of the TROY/Pyk2/PDZ-RhoGEF signalsome not resolved\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identified JAK1\\u2013STAT3 as an NF-\\u03baB-independent arm of TROY signaling driving GBM migration and temozolomide resistance, broadening the receptor's oncogenic output.\",\n      \"evidence\": \"Co-IP (TROY-JAK1), JAK1/STAT3 phosphorylation and reporter assays, JAK1 siRNA and ruxolitinib with migration/resistance readouts\",\n      \"pmids\": [\"32629176\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs scaffolded TROY-JAK1 contact not distinguished\", \"Single-lab interaction without reciprocal in vivo confirmation\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Established TROY as a downstream effector of oncogenic \\u03b2-catenin in hepatocellular carcinoma that both promotes stemness via p85\\u03b1 degradation/PI3K-AKT-TBX3 and enforces immune exclusion by repressing SASP cytokines.\",\n      \"evidence\": \"ChIP-seq/transcriptome with CTNNB1 S45P models and ICG-001; co-IP, p85\\u03b1 ubiquitylation/degradation, AKT/TBX3 and stemness assays with wortmannin\",\n      \"pmids\": [\"35351523\", \"35610614\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"E3 ligase mediating p85\\u03b1 ubiquitylation not identified\", \"Mechanism linking TROY to SASP cytokine repression undefined\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The authentic physiological ligand(s) and the rules governing which downstream pathway (NF-\\u03baB, JNK, RhoA, JAK1-STAT3, PI3K, TGF\\u03b2 inhibition) TROY engages in a given cell type remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"LT\\u03b1 candidacy not independently validated as the physiological ligand\", \"No structural basis for context-dependent effector selection\", \"Reconciliation of pro-death versus pro-survival signaling lacking\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060089\", \"supporting_discovery_ids\": [0, 1, 3, 4]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [14, 18]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [11, 15]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [1, 3, 4]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [14]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [0, 1, 14, 16]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [7, 10, 17, 18]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [6, 8, 9, 13]}\n    ],\n    \"complexes\": [\"NgR1/LINGO-1/TROY myelin co-receptor complex\", \"TROY/Pyk2/PDZ-RhoGEF signalsome\"],\n    \"partners\": [\"NGFR\", \"LINGO1\", \"RTN4R\", \"TRAF2\", \"ARHGDIA\", \"PTK2B\", \"ARHGEF11\", \"JAK1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}