{"gene":"TFG","run_date":"2026-06-10T10:51:55","timeline":{"discoveries":[{"year":1999,"finding":"TFG fuses to ALK in anaplastic large cell lymphoma, generating TFG-ALK(S) and TFG-ALK(L) chimeric proteins (85 kDa and 97 kDa) that retain functional tyrosine kinase activity, as demonstrated by in vitro tyrosine kinase assay.","method":"In vitro tyrosine kinase assay, RT-PCR, cDNA cloning","journal":"Blood","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro kinase assay directly measuring enzymatic activity of cloned chimeric proteins, single lab but multiple orthogonal methods","pmids":["10556217"],"is_preprint":false},{"year":1998,"finding":"The TFG coiled-coil domain mediates oligomerization of the TRK-T3 oncoprotein, which is required for constitutive tyrosine kinase activation; deletion of the coiled-coil domain abrogates oligomer formation and constitutive activation, while deletion of the N-terminal region blocks transformation without affecting phosphorylation or complex formation, suggesting a role in cellular localization or substrate interaction.","method":"Deletion mutagenesis, NIH3T3 transformation assay, co-immunoprecipitation, biochemical complex analysis","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1 / Moderate — reconstitution with mutagenesis and functional transformation assays, single lab with multiple orthogonal methods","pmids":["9488046"],"is_preprint":false},{"year":2002,"finding":"TFG-ALK fusion proteins (TFG-ALK(S), TFG-ALK(L), TFG-ALK(XL)) have similar transforming efficiency to NPM-ALK in NIH-3T3 fibroblasts and form stable complexes with signaling proteins Grb2, Shc, and PLC-γ.","method":"NIH-3T3 transformation assay, co-immunoprecipitation, genomic breakpoint analysis","journal":"The American journal of pathology","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — transformation assay plus reciprocal co-IP for signaling complex identification, single lab, multiple methods","pmids":["11943732"],"is_preprint":false},{"year":2003,"finding":"Sequences outside the TFG coiled-coil domain in TRK-T3 are required for oncogenic activation; specifically, a PB1 domain and an SH2-binding motif within TFG sequences contribute to protein processing, stable complex formation, and transformation.","method":"Deletion mutagenesis, site-specific mutagenesis, NIH3T3 transformation assay, biochemical assays","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1 / Moderate — reconstitution with mutagenesis and functional assays, single lab but multiple orthogonal approaches","pmids":["12584559"],"is_preprint":false},{"year":2004,"finding":"TFG interacts with SHP-1 phosphatase; the SHP-1 SH2 domain associates with TFG-derived sequences of TRK-T3 while the SHP-1 catalytic domain associates with the NTRK1-derived portion, and SHP-1 down-regulates TRK-T3 activity. TFG itself is identified as a novel SHP-1-interacting protein.","method":"Co-immunoprecipitation, in vitro binding assay","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP with domain mapping, single lab","pmids":["15557341"],"is_preprint":false},{"year":2006,"finding":"TFG interacts with NEMO and TANK (two NF-κB pathway modulators), identified by yeast two-hybrid screening and confirmed by in vitro and in vivo co-immunoprecipitation. TFG and NEMO form part of the same high molecular weight complex. TFG enhances NF-κB activity induced by TNF-α, TANK, TRAF2, and TRAF6.","method":"Yeast two-hybrid, co-immunoprecipitation, NF-κB reporter assay","journal":"Journal of cellular physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — yeast two-hybrid plus co-IP plus functional reporter assay, single lab","pmids":["16547966"],"is_preprint":false},{"year":2011,"finding":"C. elegans TFG-1 (ortholog of human TFG) interacts directly with SEC-16 and controls ER export via COPII-coated vesicles. TFG-1 forms hexamers that facilitate co-assembly of SEC-16 with COPII subunits. TFG-1 depletion leads to marked decline in both SEC-16 and COPII levels at ER exit sites.","method":"Co-immunoprecipitation, hydrodynamic (sedimentation) studies, RNAi depletion, immunofluorescence","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — direct biochemical interaction, hydrodynamic oligomer characterization, functional depletion phenotype, multiple orthogonal methods, replicated across organisms","pmids":["21478858"],"is_preprint":false},{"year":2013,"finding":"Loss of TFG function in cell lines slows protein secretion from the ER and alters ER morphology, disrupting organization of peripheral ER tubules and causing collapse of the ER network onto the microtubule cytoskeleton. A disease-causing R106C mutation impairs TFG self-assembly into oligomeric complexes.","method":"siRNA knockdown, biochemical oligomerization assay, live-cell imaging, electron microscopy","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — direct functional assays (secretion assay, ER morphology imaging) combined with biochemical characterization of mutant, single lab with multiple orthogonal methods","pmids":["23479643"],"is_preprint":false},{"year":2013,"finding":"TFG protein negatively regulates RIG-I-mediated antiviral type-I IFN signaling by binding TRIM25 upon virus infection; TFG knockdown upregulates RIG-I-mediated IFN production and NF-κB signaling, and inhibits VSV replication. TFG also suppresses MAVS-induced signaling.","method":"shRNA knockdown, co-immunoprecipitation, IFN reporter assay, VSV replication assay","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus functional reporter and viral replication assays, single lab","pmids":["23810392"],"is_preprint":false},{"year":2014,"finding":"A dominant TFG p.Gly269Val mutation causes CMT2 by increasing the propensity of TFG proteins to form aggregates, sequestering both mutant and wild-type TFG. Loss of endogenous TFG compromises the protein secretion pathway, as demonstrated by secreted Gaussia luciferase reporter assay; this defect is rescued by wild-type but not p.Gly269Val TFG.","method":"Cell transfection, aggregate formation assay, secreted Gaussia luciferase reporter assay","journal":"Neurology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional secretion assay with rescue experiment plus aggregate formation assay, single lab","pmids":["25098539"],"is_preprint":false},{"year":2015,"finding":"Mammalian TFG forms flexible, octameric cup-like structures (determined by 3D electron microscopy) that self-associate into larger polymers in vitro. In cells, TFG localizes to the ER/ERGIC interface and clusters COPII-coated transport carriers. Loss of TFG function dramatically slows ER protein export and causes accumulation of COPII-coated carriers throughout the cytoplasm, and disrupts the tight association between ER and ERGIC membranes.","method":"3D electron microscopy, in vitro self-association assay, siRNA knockdown, live-cell imaging, protein secretion assay","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1 / Strong — structural determination by EM, biochemical self-association, functional knockdown with defined phenotypes, multiple orthogonal methods","pmids":["25586378"],"is_preprint":false},{"year":2016,"finding":"TFG organizes transitional ER (tER) and ER exit sites into larger structures. TFG depletion disperses tER elements but does not abolish ERES function for small soluble cargoes; however, TFG is specifically required for export of procollagen from the ER, revealing a role in optimizing COPII assembly for large cargo.","method":"siRNA knockdown, live-cell imaging, secretion assay for procollagen and soluble cargoes","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — specific knockdown with multiple cargo assays distinguishing TFG-dependent from TFG-independent transport, single lab","pmids":["27184855"],"is_preprint":false},{"year":2016,"finding":"ALG-2 (Ca2+-binding protein, PDCD6 product) interacts with TFG through an ALG-2-binding motif on TFG, promotes TFG localization and retention at ER exit sites in a Ca2+-dependent manner, and promotes TFG polymerization in vitro as shown by in vitro cross-linking assays.","method":"Co-immunoprecipitation, immunostaining, time-lapse live-cell imaging, in vitro cross-linking assay, deletion mutagenesis","journal":"The FEBS journal","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — in vitro cross-linking assay plus co-IP, live imaging, and mutagenesis, single lab with multiple orthogonal methods","pmids":["27813252"],"is_preprint":false},{"year":2016,"finding":"A SPG57-associated TFG variant (p.Arg22Trp) within the PB1 domain impairs TFG oligomerization in vitro, distinct from the coiled-coil domain mutation (p.Arg106Cys), suggesting that both PB1 and coiled-coil domains contribute to TFG complex formation and function.","method":"In vitro oligomerization assay, next-generation sequencing, linkage analysis","journal":"European journal of human genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro oligomerization assay, single lab","pmids":["27601211"],"is_preprint":false},{"year":2017,"finding":"TFG binds directly to the inner COPII coat protein Sec23 through a C-terminal interaction that shares an interface with the outer COPII coat and cargo receptor Tango1/cTAGE5. TFG binding to Sec23 outcompetes these other associations in a concentration-dependent manner and promotes outer coat dissociation. TFG also tethers vesicles harboring the inner COPII coat, contributing to their clustering at the ER/ERGIC interface.","method":"In vitro binding/competition assay, co-immunoprecipitation, cell-based vesicle clustering assay","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct in vitro binding assay with competition experiment and concentration-dependence, plus cellular functional assay, single lab multiple methods","pmids":["28851831"],"is_preprint":false},{"year":2017,"finding":"β-cell-specific TFG knockout mice display glucose intolerance with reduced insulin secretion, smaller β-cell masses due to diminished proliferation, impaired β-cell expansion on high-fat diet, ER dilatation (ER stress), and downregulation of Nrf2 pathway genes.","method":"Conditional knockout mice, glucose tolerance test, insulin secretion assay, immunohistochemistry, electron microscopy, microarray gene expression","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — conditional KO with multiple phenotypic readouts including EM and secretion assay, single lab","pmids":["29026155"],"is_preprint":false},{"year":2018,"finding":"The TFG p.R106C mutation (causing early-onset HSP) alters compaction of TFG ring complexes. CRISPR-engineered human stem cells expressing mutant TFG at endogenous levels exhibit specific defects in ER secretion and axon fasciculation following neuronal differentiation.","method":"CRISPR genome editing, protein secretion assay, neuronal differentiation, axon fasciculation assay, biochemical ring complex characterization","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — CRISPR editing at endogenous levels plus functional secretion and neuronal assays, single lab multiple methods","pmids":["30157421"],"is_preprint":false},{"year":2020,"finding":"TFG is required for autophagy flux in CH12 B lymphoma cells. Loss of TFG disrupts ER structure (expanded ER), increases ER stress sensitivity, causes accumulation of autophagosomes, and reduces autophagosome-lysosome fusion (lower LC3-II turnover), as demonstrated by tandem-fluorescent-LC3 assay.","method":"CRISPR-Cas9 KO, tandem-fluorescent-LC3 assay, LC3 turnover assay, ER stress assay","journal":"Autophagy","confidence":"High","confidence_rationale":"Tier 2 / Moderate — CRISPR KO with multiple autophagy flux assays and ER morphology, single lab","pmids":["32910713"],"is_preprint":false},{"year":2020,"finding":"TFG maintains the steady-state level of FANCD2-V2 (a specific isoform) through direct protein interaction; the TFG amino acids 5–100 interact with FANCD2-V2 amino acids 1437–1442. Loss of this interaction impairs timely FANCD2-V2 nuclear focus formation upon DNA damage and leads to increased carcinogenicity.","method":"Co-immunoprecipitation, deletion mutagenesis, DNA damage focus formation assay, carcinogenicity assay","journal":"Aging","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP with domain mapping and functional DNA damage assay, single lab","pmids":["33099537"],"is_preprint":false},{"year":2020,"finding":"TFG-RET fusion in papillary thyroid cancer oligomerizes in a PB1 domain-dependent manner; oligomerization is required for oncogenic transformation of immortalized human thyroid cells. Expression of TFG-RET leads to upregulation of E3 ubiquitin ligase HUWE1; inhibition of HUWE1 reduces RET-mediated oncogenesis.","method":"RNA-seq, cell transformation assay, domain mutagenesis, quantitative proteomics, HUWE1 inhibition assay","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — transformation assay with PB1 domain mutagenesis, quantitative proteomics, and inhibitor validation, single lab multiple orthogonal methods","pmids":["32345963"],"is_preprint":false},{"year":2021,"finding":"TFG interacts with TRAF3 E3 ubiquitin ligase and stabilizes ULK1 by competing with the TRAF3-ULK1 interaction, thereby preventing K48-linked ubiquitination and proteasomal degradation of ULK1. TFG deficiency leads to increased ULK1-TRAF3 interaction, K48-linked ULK1 ubiquitination, and proteasomal degradation, resulting in higher ROS and pyroptotic cell death in macrophages.","method":"Co-immunoprecipitation, ubiquitination assay, proteasome inhibition, siRNA/shRNA knockdown, cell death assay","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP plus ubiquitination assay with K48-linkage specificity and rescue experiment, single lab multiple methods","pmids":["35091545"],"is_preprint":false},{"year":2021,"finding":"TFG binds LC3C through a canonical LIR motif, which enables TFG to favor LC3C-ULK1 binding and thereby promote ULK1 puncta formation, omegasome formation, and autophagosome biogenesis. Fibroblasts from HSP patient with TFG R106C mutation show defects in both autophagy and ULK1 puncta accumulation.","method":"Co-immunoprecipitation, LIR motif mutagenesis, immunofluorescence, autophagosome formation assay, patient fibroblast analysis","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP with LIR mutagenesis and functional autophagy assays, validated in patient cells, single lab multiple methods","pmids":["33932238"],"is_preprint":false},{"year":2021,"finding":"TFG is required for virus-induced TBK1 activation and IRF3 phosphorylation/dimerization. TFG acts as a TRAF3-interacting protein that facilitates efficient recruitment of TRAF3 to MAVS following Sendai virus infection. TFG-TRAF3 complex also engages mTOR, enabling TBK1 to phosphorylate mTOR on serine 2159 to promote mTORC1 signaling and antiviral gene expression.","method":"siRNA/shRNA knockdown, co-immunoprecipitation, IRF3 phosphorylation/dimerization assay, mTOR phosphorylation assay, viral infection assay","journal":"PLoS pathogens","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP plus multiple functional signaling assays with knockdown, single lab multiple orthogonal methods","pmids":["33411856"],"is_preprint":false},{"year":2022,"finding":"In addition to its role in ER secretory transport, TFG has an unexpected role in trafficking of Rab4A-positive recycling endosomes specifically within axons and dendrites of neurons. Impaired TFG function (R106C) delays biosynthetic secretory protein transport from the ER and compromises transport of endosomal cargoes, resulting in down-regulated inhibitory receptor signaling. Mitochondria and lysosome morphology/trafficking are unaffected.","method":"CRISPR-Cas9 rat model, primary cortical neuron culture, live-cell imaging, organelle trafficking assay, cargo-specific transport assay","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo CRISPR rat model validated by multiple in vitro neuronal assays with organelle-specific controls, single lab but highly rigorous","pmids":["36161950"],"is_preprint":false},{"year":2022,"finding":"Loss of TFG in motor neurons (vMNTFG KO mice) is sufficient to cause NMJ degeneration, motor function deterioration, and muscle atrophy. Muscle-specific TFG KO (MUSTFG KO) does not cause apparent motor impairment but elevates a denervation marker and inhibits Agrin-induced AChR clustering in C2C12 myotubes.","method":"Tissue-specific conditional knockout mice, motor function testing, NMJ morphology, immunohistochemistry, C2C12 cell assay","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — cell type-specific conditional KO with multiple in vivo and in vitro phenotypic readouts, single lab","pmids":["35121777"],"is_preprint":false},{"year":2023,"finding":"Disease-related mutations G269V and P285L in the low-complexity domain of TFG cause that domain to form amyloid fibrils. Cryo-EM structures confirm unmistakable amyloid architecture with double-protofilament cores; mutant residues stabilize the fibril structure and mutant sequences show increased amyloid propensity compared to wild-type.","method":"Cryo-electron microscopy structure determination, in vitro fibril formation assay","journal":"PNAS nexus","confidence":"High","confidence_rationale":"Tier 1 / Moderate — atomic-resolution cryo-EM structures of disease-mutant TFG fibrils, single lab","pmids":["38077690"],"is_preprint":false},{"year":2024,"finding":"TFG regulates the rate of inner COPII coat (Sec23) recruitment to ER budding sites. In cells lacking TFG, Sec23 accumulates more rapidly at ER subdomains, potentially causing premature GTP hydrolysis on Sar1 and delaying anterograde secretory cargo trafficking regardless of cargo size.","method":"siRNA/CRISPR knockdown, live-cell imaging of Sec23 dynamics, secretory cargo trafficking assay","journal":"Molecular biology of the cell","confidence":"High","confidence_rationale":"Tier 2 / Moderate — direct live-cell kinetic imaging of COPII coat dynamics with multiple cargo assays, single lab","pmids":["38985515"],"is_preprint":false},{"year":2024,"finding":"TFG forms octameric ring complexes as determined by X-ray crystallography and cryo-EM. A network of electrostatic and hydrophobic interactions defines the interface between protomers. HSP-associated mutations in the PB1 domain disrupt this interface, destabilize octamers, and lead to axonopathy in vivo.","method":"X-ray crystallography, cryo-electron microscopy, in vitro ring complex assay, in vivo axonopathy model","journal":"bioRxiv","confidence":"High","confidence_rationale":"Tier 1 / Strong — atomic-resolution structural determination by two complementary methods plus in vivo functional validation, single lab","pmids":["39574627"],"is_preprint":true},{"year":2025,"finding":"At physiological conditions TFG self-organizes into a hollow, anisotropic condensate that matches the dimensions of the ER-Golgi interface and is dynamically regulated across the cell cycle. Regularly spaced hydrophobic residues control the condensation mechanism, producing a porous condensate surface that acts as a molecular sieve: it allows access of COPII (anterograde coat) to the condensate interior while restricting COPI (retrograde coat), spatially compartmentalizing anterograde from retrograde carriers.","method":"Live-cell imaging, in vitro condensate reconstitution, size-exclusion/diffusion assay, hydrophobic residue mutagenesis, cell cycle manipulation","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution of condensate with mutagenesis plus cellular imaging and functional sieving assay, published in peer-reviewed journal","pmids":["40253417"],"is_preprint":false},{"year":2025,"finding":"FBXO45 E3 ubiquitin ligase promotes TFG ubiquitination at Lys103, increasing TFG stability. Stabilized TFG facilitates binding of transcription factor ATF2, leading to upregulation of NF-κB p65 expression and promoting migration and invasion in TP53-mutant HCC cells. TFG knockdown abrogates FBXO45-driven metastasis in vivo.","method":"Co-immunoprecipitation, ubiquitination assay (Lys103-specific), ATF2 binding assay, NF-κB reporter, in vivo xenograft metastasis model","journal":"JHEP reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP plus site-specific ubiquitination assay plus in vivo rescue, single lab multiple orthogonal methods","pmids":["41030651"],"is_preprint":false},{"year":2000,"finding":"Xenopus TFG (xTFG) selectively interacts with SH3 domains of Src, PLCγ, and the p85 subunit of PI3-kinase, identifying a functional SH3-binding motif in TFG.","method":"SH3 domain pulldown assay, transgenic Xenopus overexpression","journal":"Molecular reproduction and development","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — direct pulldown assay demonstrating SH3 binding selectivity, replicated across multiple SH3 domains, single lab","pmids":["10861999"],"is_preprint":false}],"current_model":"TFG is a multifunctional scaffold protein that self-assembles into octameric ring complexes and, at physiological conditions, forms a hollow condensate at the ER/ERGIC interface where it promotes COPII-mediated anterograde ER export by binding Sec23 to control coat dynamics, clusters COPII carriers, facilitates outer coat disassembly, and acts as a molecular sieve that spatially segregates anterograde from retrograde carriers; disease-causing mutations in its PB1 or coiled-coil domains disrupt oligomerization, impair secretory trafficking and ER homeostasis, and lead to neurodegeneration, while TFG additionally participates in autophagy (via LC3C-LIR interaction), antiviral innate immunity (via TRAF3-TBK1-IRF3 axis), ULK1 stability regulation, endosomal trafficking in neurons, and NF-κB signaling."},"narrative":{"mechanistic_narrative":"TFG is a self-assembling scaffold protein that organizes the early secretory pathway by structuring the ER/ERGIC interface and tuning COPII coat dynamics [PMID:25586378, PMID:21478858]. It oligomerizes through its PB1 and coiled-coil domains into octameric, cup-like ring complexes that further polymerize and, at physiological conditions, self-organize into a hollow condensate matching the dimensions of the ER-Golgi interface; regularly spaced hydrophobic residues render this condensate a molecular sieve that admits the anterograde COPII coat while excluding retrograde COPI, spatially segregating the two carrier populations [PMID:39574627, PMID:40253417]. Functionally, TFG binds the inner COPII coat protein Sec23 through a C-terminal interface shared with the outer coat and the cargo receptor Tango1/cTAGE5, competing with these associations to promote outer coat dissociation and to control the rate of Sec23 recruitment to ER budding sites; it also tethers and clusters inner-coated carriers at the ER/ERGIC interface [PMID:28851831, PMID:38985515]. Through these activities TFG organizes transitional ER and ER exit sites, supports anterograde protein secretion (including the specialized export of large cargo such as procollagen), and maintains ER network morphology, with its localization and polymerization promoted in a Ca2+-dependent manner by ALG-2 [PMID:21478858, PMID:27184855, PMID:25586378, PMID:27813252]. Disease-causing mutations act on its assembly: PB1-domain (R22W) and coiled-coil (R106C) variants disrupt oligomerization and ring-complex compaction, impairing ER secretion and causing axonopathy and hereditary spastic paraplegia, while low-complexity-domain mutations (G269V, P285L) drive amyloid fibril formation that sequesters wild-type TFG and underlies CMT2-type neurodegeneration [PMID:27601211, PMID:30157421, PMID:38077690, PMID:39574627, PMID:25098539]. Beyond the secretory pathway, TFG promotes autophagosome biogenesis by binding LC3C through a LIR motif to favor LC3C-ULK1 engagement and stabilizes ULK1 by competing with TRAF3-mediated K48-linked ubiquitination, and it modulates antiviral innate immunity by recruiting TRAF3 to MAVS and engaging the TBK1-IRF3 axis [PMID:33932238, PMID:35091545, PMID:33411856]. TFG was originally identified as the N-terminal fusion partner in oncogenic chimeras (TFG-ALK, TRK-T3/TFG-NTRK1, TFG-RET), where its oligomerization domains mediate constitutive kinase activation and transformation [PMID:10556217, PMID:9488046, PMID:32345963].","teleology":[{"year":1999,"claim":"Established TFG as a recurrent fusion partner whose oligomerization domains confer constitutive activity on chimeric tyrosine kinases, the founding observation that revealed TFG's self-association capacity.","evidence":"cDNA cloning and in vitro tyrosine kinase assay of TFG-ALK chimeras; deletion mutagenesis and NIH3T3 transformation of TRK-T3 mapping the coiled-coil requirement","pmids":["10556217","9488046","11943732"],"confidence":"High","gaps":["Did not address the normal cellular function of full-length TFG","Role of N-terminal/PB1 region in transformation only partly resolved"]},{"year":2003,"claim":"Refined the structural determinants of TFG-driven transformation, showing that the PB1 domain and an SH2-binding motif beyond the coiled-coil contribute to complex formation, while parallel work mapped TFG's engagement of SH2/SH3-bearing signaling proteins.","evidence":"Deletion/site-specific mutagenesis and transformation assays; reciprocal co-IP with Grb2/Shc/PLC-gamma and SHP-1; SH3 pulldowns in Xenopus","pmids":["12584559","15557341","30157421","10861999"],"confidence":"High","gaps":["Most signaling associations defined in the fusion-protein context, not endogenous TFG","Functional consequence of SH3/SH2 binding for native TFG undefined"]},{"year":2006,"claim":"First linked TFG to inflammatory signaling, placing it within NF-kappaB-modulating complexes.","evidence":"Yeast two-hybrid, co-IP, and NF-kappaB reporter assays identifying NEMO and TANK interactions","pmids":["16547966"],"confidence":"Medium","gaps":["Mechanism of NF-kappaB enhancement not resolved","Stoichiometry within the NEMO complex unknown"]},{"year":2011,"claim":"Defined TFG's core cellular function in ER export, showing the conserved ortholog directly couples SEC-16 with the COPII machinery at ER exit sites via oligomerization.","evidence":"C. elegans TFG-1 co-IP with SEC-16, hydrodynamic oligomer characterization, and RNAi depletion phenotypes","pmids":["21478858"],"confidence":"High","gaps":["Hexamer model later revised to octamer in mammals","Direct cargo selectivity not yet addressed"]},{"year":2015,"claim":"Provided the structural and functional framework for TFG as an ER/ERGIC scaffold, demonstrating self-assembling octameric cup-like polymers that cluster COPII carriers.","evidence":"3D electron microscopy, in vitro self-association, siRNA knockdown with secretion and live-cell imaging assays","pmids":["25586378","23479643"],"confidence":"High","gaps":["Molecular contacts with COPII components not yet mapped","Atomic-resolution interface unresolved"]},{"year":2016,"claim":"Resolved cargo selectivity and regulatory inputs, showing TFG is specifically required for large-cargo (procollagen) export and is recruited and polymerized at ERES by Ca2+-dependent ALG-2.","evidence":"siRNA cargo-specific secretion assays for procollagen vs soluble cargo; ALG-2 co-IP, in vitro cross-linking, and live imaging","pmids":["27184855","27813252"],"confidence":"High","gaps":["How ALG-2/Ca2+ signaling integrates with secretory demand unclear","Selectivity mechanism for large cargo not mechanistically defined at this stage"]},{"year":2017,"claim":"Identified the direct molecular target of TFG on the COPII coat, establishing it as a regulator of coat dynamics through competition at the Sec23 interface.","evidence":"In vitro binding/competition assays with concentration-dependence, co-IP, and cellular vesicle-clustering assays mapping the Sec23/Tango1/cTAGE5 interface","pmids":["28851831"],"confidence":"High","gaps":["Kinetic consequences for Sar1 GTP hydrolysis not directly measured here","Link between Sec23 binding and condensate organization not yet made"]},{"year":2018,"claim":"Connected TFG assembly defects to neuronal disease at endogenous expression levels, showing the R106C ring-compaction defect impairs secretion and axon fasciculation.","evidence":"CRISPR-engineered human stem cells, secretion assays, and neuronal differentiation with axon fasciculation readouts","pmids":["30157421","25098539","27601211"],"confidence":"High","gaps":["Cell-type basis of neuronal vulnerability incomplete","How impaired oligomerization translates to axonal phenotype unresolved"]},{"year":2021,"claim":"Expanded TFG's scaffold role into autophagy and ULK1 regulation, showing LC3C-LIR binding promotes autophagosome biogenesis and TFG protects ULK1 from TRAF3-mediated degradation.","evidence":"Co-IP, LIR/ubiquitination assays, autophagy flux measurements, and patient fibroblast analysis","pmids":["33932238","32910713","35091545"],"confidence":"High","gaps":["Interplay between ER-export and autophagy roles of TFG unclear","Whether ULK1 stabilization is independent of ER scaffolding unknown"]},{"year":2022,"claim":"Refined TFG's antiviral and neuronal trafficking roles, showing TRAF3 recruitment to MAVS and TBK1-IRF3/mTOR engagement, and an ER-export-independent role in Rab4A recycling-endosome trafficking in neurons.","evidence":"Knockdown with IRF3/mTOR phosphorylation assays and viral infection; CRISPR rat model with organelle-specific neuronal trafficking assays","pmids":["33411856","36161950","35121777"],"confidence":"High","gaps":["How a single scaffold partitions among ER, autophagy, immune, and endosomal functions unresolved","Direct biochemical basis for endosomal role not defined"]},{"year":2024,"claim":"Delivered atomic-resolution architecture and kinetic mechanism, defining the octameric ring interface disrupted by PB1 mutations and showing TFG sets the rate of Sec23 recruitment.","evidence":"X-ray crystallography and cryo-EM of ring complexes with in vivo axonopathy; live-cell kinetic imaging of Sec23 dynamics; cryo-EM of disease-mutant amyloid fibrils","pmids":["39574627","38985515","38077690"],"confidence":"High","gaps":["Octamer ring structure reported in a preprint","Direct measurement of Sar1 GTP hydrolysis rate inferred, not shown"]},{"year":2025,"claim":"Unified TFG's structural and functional roles into a condensate model, showing it forms a hollow biomolecular condensate acting as a molecular sieve to segregate anterograde from retrograde carriers, while a parallel cancer study defined an FBXO45-TFG-ATF2-NF-kappaB stabilization axis.","evidence":"In vitro condensate reconstitution, diffusion/sieving assays, hydrophobic-residue mutagenesis, cell-cycle manipulation; site-specific ubiquitination and in vivo metastasis assays","pmids":["40253417","41030651"],"confidence":"High","gaps":["How condensate material properties are regulated in vivo across the cell cycle incompletely defined","Relationship between FBXO45-driven stabilization and secretory function unknown"]},{"year":null,"claim":"How a single self-assembling scaffold mechanistically coordinates its distinct roles in ER export, autophagy, innate immunity, and neuronal endosomal trafficking, and how condensate properties are tuned to physiological state, remains unresolved.","evidence":"","pmids":[],"confidence":"High","gaps":["No integrated model partitioning TFG among its functions","Regulatory inputs governing condensate assembly/disassembly in vivo undefined","Mechanism linking endosomal trafficking role to the secretory scaffold unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[6,10,14]},{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[10,27,28]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[14,26,20]}],"localization":[{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[6,7,10,11]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[10,14]}],"pathway":[{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[6,10,11,14]},{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[10,14,26]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[17,21]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[8,22]}],"complexes":["COPII coat","ER/ERGIC interface scaffold (TFG condensate)"],"partners":["SEC23","SEC16","PDCD6/ALG-2","TANGO1/CTAGE5","TRAF3","ULK1","MAP1LC3C","TRIM25"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q92734","full_name":"Protein TFG","aliases":["TRK-fused gene protein"],"length_aa":400,"mass_kda":43.4,"function":"Plays a role in the normal dynamic function of the endoplasmic reticulum (ER) and its associated microtubules (PubMed:23479643, PubMed:27813252). 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response.","date":"2020","source":"Aging","url":"https://pubmed.ncbi.nlm.nih.gov/33099537","citation_count":6,"is_preprint":false},{"pmid":"38985515","id":"PMC_38985515","title":"TFG regulates inner COPII coat recruitment to facilitate anterograde secretory protein transport.","date":"2024","source":"Molecular biology of the cell","url":"https://pubmed.ncbi.nlm.nih.gov/38985515","citation_count":6,"is_preprint":false},{"pmid":"14687027","id":"PMC_14687027","title":"Altered expression of Tfg and Dap3 in Ikaros-defective T-cell lymphomas induced by X-irradiation in B6C3F1 mice.","date":"2004","source":"British journal of haematology","url":"https://pubmed.ncbi.nlm.nih.gov/14687027","citation_count":6,"is_preprint":false},{"pmid":"16298092","id":"PMC_16298092","title":"Probable role of spinal purinoceptors in the analgesic effect of Trigonella foenum (TFG) leaves extract.","date":"2005","source":"Journal of ethnopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/16298092","citation_count":6,"is_preprint":false},{"pmid":"33767317","id":"PMC_33767317","title":"Homozygous TFG gene variants expanding the mutational and clinical spectrum of hereditary spastic paraplegia 57 and a review of literature.","date":"2021","source":"Journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/33767317","citation_count":5,"is_preprint":false},{"pmid":"37890998","id":"PMC_37890998","title":"Novel TFG mutation causes autosomal-dominant spastic paraplegia and defects in autophagy.","date":"2024","source":"Journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/37890998","citation_count":5,"is_preprint":false},{"pmid":"30467354","id":"PMC_30467354","title":"A novel homozygous mutation of the TFG gene in a patient with early onset spastic paraplegia and later onset sensorimotor polyneuropathy.","date":"2018","source":"Journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/30467354","citation_count":5,"is_preprint":false},{"pmid":"31111683","id":"PMC_31111683","title":"Continuum of phenotypes in hereditary motor and sensory neuropathy with proximal predominance and Charcot-Marie-Tooth patients with TFG mutation.","date":"2019","source":"American journal of medical genetics. Part A","url":"https://pubmed.ncbi.nlm.nih.gov/31111683","citation_count":5,"is_preprint":false},{"pmid":"30957313","id":"PMC_30957313","title":"Sural nerve pathology in TFG-associated motor neuron disease with sensory neuropathy.","date":"2019","source":"Neuropathology : official journal of the Japanese Society of Neuropathology","url":"https://pubmed.ncbi.nlm.nih.gov/30957313","citation_count":5,"is_preprint":false},{"pmid":"33731690","id":"PMC_33731690","title":"Non-secretory multiple myeloma with unusual TFG-ALK fusion showed dramatic response to ALK inhibition.","date":"2021","source":"NPJ genomic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/33731690","citation_count":5,"is_preprint":false},{"pmid":"35642252","id":"PMC_35642252","title":"Mutation Screening of TFG in α-Synucleinopathy and Amyotrophic Lateral Sclerosis.","date":"2022","source":"Movement disorders : official journal of the Movement Disorder Society","url":"https://pubmed.ncbi.nlm.nih.gov/35642252","citation_count":4,"is_preprint":false},{"pmid":"38077690","id":"PMC_38077690","title":"Fibril structures of TFG protein mutants validate the identification of TFG as a disease-related amyloid protein by the IMPAcT method.","date":"2023","source":"PNAS nexus","url":"https://pubmed.ncbi.nlm.nih.gov/38077690","citation_count":4,"is_preprint":false},{"pmid":"38954846","id":"PMC_38954846","title":"Dramatic response to crizotinib through MET phosphorylation inhibition in rare TFG-MET fusion advanced squamous cell lung cancer.","date":"2025","source":"The oncologist","url":"https://pubmed.ncbi.nlm.nih.gov/38954846","citation_count":4,"is_preprint":false},{"pmid":"32666699","id":"PMC_32666699","title":"A novel TFG c.793C>G mutation in a Chinese pedigree with Charcot-Marie-Tooth disease 2.","date":"2020","source":"Brain and behavior","url":"https://pubmed.ncbi.nlm.nih.gov/32666699","citation_count":3,"is_preprint":false},{"pmid":"38962049","id":"PMC_38962049","title":"Remarkable response to capmatinib in a patient with intrahepatic cholangiocarcinoma harboring TFG-MET fusion.","date":"2024","source":"International cancer conference journal","url":"https://pubmed.ncbi.nlm.nih.gov/38962049","citation_count":3,"is_preprint":false},{"pmid":"38649144","id":"PMC_38649144","title":"Identification of TFG- and Autophagy-Regulated Proteins and Glycerophospholipids in B Cells.","date":"2024","source":"Journal of proteome research","url":"https://pubmed.ncbi.nlm.nih.gov/38649144","citation_count":2,"is_preprint":false},{"pmid":"40578648","id":"PMC_40578648","title":"Screening and identification of Theileria annulata proteins interacting with bovine TFG proteins.","date":"2025","source":"International journal of biological macromolecules","url":"https://pubmed.ncbi.nlm.nih.gov/40578648","citation_count":2,"is_preprint":false},{"pmid":"39527745","id":"PMC_39527745","title":"Cell type-specific gene therapy confers protection against motor neuron disease caused by a TFG variant.","date":"2024","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/39527745","citation_count":2,"is_preprint":false},{"pmid":"37305584","id":"PMC_37305584","title":"TFG::ALK fusion in ALK positive large B-cell lymphoma: a case report and review of literature.","date":"2023","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/37305584","citation_count":2,"is_preprint":false},{"pmid":"36430262","id":"PMC_36430262","title":"TFG-β Nuclear Staining as a Potential Relapse Risk Factor in Early-Stage Non-Small-Cell Lung Cancer.","date":"2022","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/36430262","citation_count":2,"is_preprint":false},{"pmid":"24073693","id":"PMC_24073693","title":"A TFG-TEC nuclear localization mutant forms complexes with the wild-type TFG-TEC oncoprotein and suppresses its activity.","date":"2013","source":"The Biochemical journal","url":"https://pubmed.ncbi.nlm.nih.gov/24073693","citation_count":2,"is_preprint":false},{"pmid":"38622850","id":"PMC_38622850","title":"Reclassification of a spindle cell sarcoma after identification of a TFG-ROS1 fusion: A case demonstrating the clinical benefit of next-generation sequencing in sarcoma.","date":"2024","source":"Molecular genetics & genomic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/38622850","citation_count":2,"is_preprint":false},{"pmid":"38837630","id":"PMC_38837630","title":"Characterization of a novel TFG variant causing autosomal recessive pure hereditary spastic paraplegia.","date":"2024","source":"Annals of clinical and translational neurology","url":"https://pubmed.ncbi.nlm.nih.gov/38837630","citation_count":1,"is_preprint":false},{"pmid":"40700600","id":"PMC_40700600","title":"ALK-positive adult histiocytosis with a TFG-ALKfusion gene.","date":"2025","source":"The oncologist","url":"https://pubmed.ncbi.nlm.nih.gov/40700600","citation_count":1,"is_preprint":false},{"pmid":"39574627","id":"PMC_39574627","title":"Multiple roles for TFG ring complexes in neuronal cargo trafficking.","date":"2024","source":"bioRxiv : the preprint server for biology","url":"https://pubmed.ncbi.nlm.nih.gov/39574627","citation_count":1,"is_preprint":false},{"pmid":"35864671","id":"PMC_35864671","title":"Proximal Dominant Hereditary Motor and Sensory Neuropathy with TFG Mutation: First Case Report from India.","date":"2022","source":"Neurology India","url":"https://pubmed.ncbi.nlm.nih.gov/35864671","citation_count":1,"is_preprint":false},{"pmid":"40386562","id":"PMC_40386562","title":"Venetoclax combined with ATRA shows promising therapeutic potential for TFG:: RARA variant APL: a case report.","date":"2025","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/40386562","citation_count":1,"is_preprint":false},{"pmid":"39606904","id":"PMC_39606904","title":"First case of acute promyelocytic leukemia with TFG-RARA achieved complete remission treated with venetoclax and all-trans retinoic acid.","date":"2024","source":"Hematology (Amsterdam, Netherlands)","url":"https://pubmed.ncbi.nlm.nih.gov/39606904","citation_count":1,"is_preprint":false},{"pmid":"36582889","id":"PMC_36582889","title":"A novel TFG variant of uncertain significance in amyotrophic lateral sclerosis: A case report and review of literature.","date":"2022","source":"Annals of medicine and surgery (2012)","url":"https://pubmed.ncbi.nlm.nih.gov/36582889","citation_count":1,"is_preprint":false},{"pmid":"24291930","id":"PMC_24291930","title":"[Hereditary motor and sensory neuropathy with proximal dominant involvement (HMSN-P) is caused by a mutation in TFG].","date":"2013","source":"Rinsho shinkeigaku = Clinical neurology","url":"https://pubmed.ncbi.nlm.nih.gov/24291930","citation_count":1,"is_preprint":false},{"pmid":"30003432","id":"PMC_30003432","title":"Transforming Growth Factor Beta (TFG-β) Concentration Isoforms are Diminished in Acute Coronary Syndrome.","date":"2018","source":"Cell biochemistry and biophysics","url":"https://pubmed.ncbi.nlm.nih.gov/30003432","citation_count":1,"is_preprint":false},{"pmid":"19007018","id":"PMC_19007018","title":"[Effect of nebulized TFG on Th1/Th2 imbalance in mouse model with asthma].","date":"2008","source":"Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica","url":"https://pubmed.ncbi.nlm.nih.gov/19007018","citation_count":1,"is_preprint":false},{"pmid":"41030651","id":"PMC_41030651","title":"Elevated FBXO45 promotes TFG ubiquitination and drives lung metastasis of hepatocellular carcinoma.","date":"2025","source":"JHEP reports : innovation in hepatology","url":"https://pubmed.ncbi.nlm.nih.gov/41030651","citation_count":0,"is_preprint":false},{"pmid":"40871367","id":"PMC_40871367","title":"Desulfitobacterium elongatum sp. nov. NIT-TF6 Isolated from Trichloroethene-Dechlorinating Culture with Formate.","date":"2025","source":"Microorganisms","url":"https://pubmed.ncbi.nlm.nih.gov/40871367","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":47707,"output_tokens":7408,"usd":0.12712,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":16640,"output_tokens":4674,"usd":0.100025,"stage2_stop_reason":"end_turn"},"total_usd":0.227145,"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\": 1999,\n      \"finding\": \"TFG fuses to ALK in anaplastic large cell lymphoma, generating TFG-ALK(S) and TFG-ALK(L) chimeric proteins (85 kDa and 97 kDa) that retain functional tyrosine kinase activity, as demonstrated by in vitro tyrosine kinase assay.\",\n      \"method\": \"In vitro tyrosine kinase assay, RT-PCR, cDNA cloning\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro kinase assay directly measuring enzymatic activity of cloned chimeric proteins, single lab but multiple orthogonal methods\",\n      \"pmids\": [\"10556217\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"The TFG coiled-coil domain mediates oligomerization of the TRK-T3 oncoprotein, which is required for constitutive tyrosine kinase activation; deletion of the coiled-coil domain abrogates oligomer formation and constitutive activation, while deletion of the N-terminal region blocks transformation without affecting phosphorylation or complex formation, suggesting a role in cellular localization or substrate interaction.\",\n      \"method\": \"Deletion mutagenesis, NIH3T3 transformation assay, co-immunoprecipitation, biochemical complex analysis\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — reconstitution with mutagenesis and functional transformation assays, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"9488046\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"TFG-ALK fusion proteins (TFG-ALK(S), TFG-ALK(L), TFG-ALK(XL)) have similar transforming efficiency to NPM-ALK in NIH-3T3 fibroblasts and form stable complexes with signaling proteins Grb2, Shc, and PLC-γ.\",\n      \"method\": \"NIH-3T3 transformation assay, co-immunoprecipitation, genomic breakpoint analysis\",\n      \"journal\": \"The American journal of pathology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — transformation assay plus reciprocal co-IP for signaling complex identification, single lab, multiple methods\",\n      \"pmids\": [\"11943732\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Sequences outside the TFG coiled-coil domain in TRK-T3 are required for oncogenic activation; specifically, a PB1 domain and an SH2-binding motif within TFG sequences contribute to protein processing, stable complex formation, and transformation.\",\n      \"method\": \"Deletion mutagenesis, site-specific mutagenesis, NIH3T3 transformation assay, biochemical assays\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — reconstitution with mutagenesis and functional assays, single lab but multiple orthogonal approaches\",\n      \"pmids\": [\"12584559\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"TFG interacts with SHP-1 phosphatase; the SHP-1 SH2 domain associates with TFG-derived sequences of TRK-T3 while the SHP-1 catalytic domain associates with the NTRK1-derived portion, and SHP-1 down-regulates TRK-T3 activity. TFG itself is identified as a novel SHP-1-interacting protein.\",\n      \"method\": \"Co-immunoprecipitation, in vitro binding assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP with domain mapping, single lab\",\n      \"pmids\": [\"15557341\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"TFG interacts with NEMO and TANK (two NF-κB pathway modulators), identified by yeast two-hybrid screening and confirmed by in vitro and in vivo co-immunoprecipitation. TFG and NEMO form part of the same high molecular weight complex. TFG enhances NF-κB activity induced by TNF-α, TANK, TRAF2, and TRAF6.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, NF-κB reporter assay\",\n      \"journal\": \"Journal of cellular physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — yeast two-hybrid plus co-IP plus functional reporter assay, single lab\",\n      \"pmids\": [\"16547966\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"C. elegans TFG-1 (ortholog of human TFG) interacts directly with SEC-16 and controls ER export via COPII-coated vesicles. TFG-1 forms hexamers that facilitate co-assembly of SEC-16 with COPII subunits. TFG-1 depletion leads to marked decline in both SEC-16 and COPII levels at ER exit sites.\",\n      \"method\": \"Co-immunoprecipitation, hydrodynamic (sedimentation) studies, RNAi depletion, immunofluorescence\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — direct biochemical interaction, hydrodynamic oligomer characterization, functional depletion phenotype, multiple orthogonal methods, replicated across organisms\",\n      \"pmids\": [\"21478858\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Loss of TFG function in cell lines slows protein secretion from the ER and alters ER morphology, disrupting organization of peripheral ER tubules and causing collapse of the ER network onto the microtubule cytoskeleton. A disease-causing R106C mutation impairs TFG self-assembly into oligomeric complexes.\",\n      \"method\": \"siRNA knockdown, biochemical oligomerization assay, live-cell imaging, electron microscopy\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — direct functional assays (secretion assay, ER morphology imaging) combined with biochemical characterization of mutant, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"23479643\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"TFG protein negatively regulates RIG-I-mediated antiviral type-I IFN signaling by binding TRIM25 upon virus infection; TFG knockdown upregulates RIG-I-mediated IFN production and NF-κB signaling, and inhibits VSV replication. TFG also suppresses MAVS-induced signaling.\",\n      \"method\": \"shRNA knockdown, co-immunoprecipitation, IFN reporter assay, VSV replication assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus functional reporter and viral replication assays, single lab\",\n      \"pmids\": [\"23810392\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"A dominant TFG p.Gly269Val mutation causes CMT2 by increasing the propensity of TFG proteins to form aggregates, sequestering both mutant and wild-type TFG. Loss of endogenous TFG compromises the protein secretion pathway, as demonstrated by secreted Gaussia luciferase reporter assay; this defect is rescued by wild-type but not p.Gly269Val TFG.\",\n      \"method\": \"Cell transfection, aggregate formation assay, secreted Gaussia luciferase reporter assay\",\n      \"journal\": \"Neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional secretion assay with rescue experiment plus aggregate formation assay, single lab\",\n      \"pmids\": [\"25098539\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Mammalian TFG forms flexible, octameric cup-like structures (determined by 3D electron microscopy) that self-associate into larger polymers in vitro. In cells, TFG localizes to the ER/ERGIC interface and clusters COPII-coated transport carriers. Loss of TFG function dramatically slows ER protein export and causes accumulation of COPII-coated carriers throughout the cytoplasm, and disrupts the tight association between ER and ERGIC membranes.\",\n      \"method\": \"3D electron microscopy, in vitro self-association assay, siRNA knockdown, live-cell imaging, protein secretion assay\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — structural determination by EM, biochemical self-association, functional knockdown with defined phenotypes, multiple orthogonal methods\",\n      \"pmids\": [\"25586378\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"TFG organizes transitional ER (tER) and ER exit sites into larger structures. TFG depletion disperses tER elements but does not abolish ERES function for small soluble cargoes; however, TFG is specifically required for export of procollagen from the ER, revealing a role in optimizing COPII assembly for large cargo.\",\n      \"method\": \"siRNA knockdown, live-cell imaging, secretion assay for procollagen and soluble cargoes\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — specific knockdown with multiple cargo assays distinguishing TFG-dependent from TFG-independent transport, single lab\",\n      \"pmids\": [\"27184855\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"ALG-2 (Ca2+-binding protein, PDCD6 product) interacts with TFG through an ALG-2-binding motif on TFG, promotes TFG localization and retention at ER exit sites in a Ca2+-dependent manner, and promotes TFG polymerization in vitro as shown by in vitro cross-linking assays.\",\n      \"method\": \"Co-immunoprecipitation, immunostaining, time-lapse live-cell imaging, in vitro cross-linking assay, deletion mutagenesis\",\n      \"journal\": \"The FEBS journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro cross-linking assay plus co-IP, live imaging, and mutagenesis, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"27813252\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"A SPG57-associated TFG variant (p.Arg22Trp) within the PB1 domain impairs TFG oligomerization in vitro, distinct from the coiled-coil domain mutation (p.Arg106Cys), suggesting that both PB1 and coiled-coil domains contribute to TFG complex formation and function.\",\n      \"method\": \"In vitro oligomerization assay, next-generation sequencing, linkage analysis\",\n      \"journal\": \"European journal of human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro oligomerization assay, single lab\",\n      \"pmids\": [\"27601211\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"TFG binds directly to the inner COPII coat protein Sec23 through a C-terminal interaction that shares an interface with the outer COPII coat and cargo receptor Tango1/cTAGE5. TFG binding to Sec23 outcompetes these other associations in a concentration-dependent manner and promotes outer coat dissociation. TFG also tethers vesicles harboring the inner COPII coat, contributing to their clustering at the ER/ERGIC interface.\",\n      \"method\": \"In vitro binding/competition assay, co-immunoprecipitation, cell-based vesicle clustering assay\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct in vitro binding assay with competition experiment and concentration-dependence, plus cellular functional assay, single lab multiple methods\",\n      \"pmids\": [\"28851831\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"β-cell-specific TFG knockout mice display glucose intolerance with reduced insulin secretion, smaller β-cell masses due to diminished proliferation, impaired β-cell expansion on high-fat diet, ER dilatation (ER stress), and downregulation of Nrf2 pathway genes.\",\n      \"method\": \"Conditional knockout mice, glucose tolerance test, insulin secretion assay, immunohistochemistry, electron microscopy, microarray gene expression\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional KO with multiple phenotypic readouts including EM and secretion assay, single lab\",\n      \"pmids\": [\"29026155\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"The TFG p.R106C mutation (causing early-onset HSP) alters compaction of TFG ring complexes. CRISPR-engineered human stem cells expressing mutant TFG at endogenous levels exhibit specific defects in ER secretion and axon fasciculation following neuronal differentiation.\",\n      \"method\": \"CRISPR genome editing, protein secretion assay, neuronal differentiation, axon fasciculation assay, biochemical ring complex characterization\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — CRISPR editing at endogenous levels plus functional secretion and neuronal assays, single lab multiple methods\",\n      \"pmids\": [\"30157421\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TFG is required for autophagy flux in CH12 B lymphoma cells. Loss of TFG disrupts ER structure (expanded ER), increases ER stress sensitivity, causes accumulation of autophagosomes, and reduces autophagosome-lysosome fusion (lower LC3-II turnover), as demonstrated by tandem-fluorescent-LC3 assay.\",\n      \"method\": \"CRISPR-Cas9 KO, tandem-fluorescent-LC3 assay, LC3 turnover assay, ER stress assay\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — CRISPR KO with multiple autophagy flux assays and ER morphology, single lab\",\n      \"pmids\": [\"32910713\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TFG maintains the steady-state level of FANCD2-V2 (a specific isoform) through direct protein interaction; the TFG amino acids 5–100 interact with FANCD2-V2 amino acids 1437–1442. Loss of this interaction impairs timely FANCD2-V2 nuclear focus formation upon DNA damage and leads to increased carcinogenicity.\",\n      \"method\": \"Co-immunoprecipitation, deletion mutagenesis, DNA damage focus formation assay, carcinogenicity assay\",\n      \"journal\": \"Aging\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP with domain mapping and functional DNA damage assay, single lab\",\n      \"pmids\": [\"33099537\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TFG-RET fusion in papillary thyroid cancer oligomerizes in a PB1 domain-dependent manner; oligomerization is required for oncogenic transformation of immortalized human thyroid cells. Expression of TFG-RET leads to upregulation of E3 ubiquitin ligase HUWE1; inhibition of HUWE1 reduces RET-mediated oncogenesis.\",\n      \"method\": \"RNA-seq, cell transformation assay, domain mutagenesis, quantitative proteomics, HUWE1 inhibition assay\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — transformation assay with PB1 domain mutagenesis, quantitative proteomics, and inhibitor validation, single lab multiple orthogonal methods\",\n      \"pmids\": [\"32345963\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TFG interacts with TRAF3 E3 ubiquitin ligase and stabilizes ULK1 by competing with the TRAF3-ULK1 interaction, thereby preventing K48-linked ubiquitination and proteasomal degradation of ULK1. TFG deficiency leads to increased ULK1-TRAF3 interaction, K48-linked ULK1 ubiquitination, and proteasomal degradation, resulting in higher ROS and pyroptotic cell death in macrophages.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay, proteasome inhibition, siRNA/shRNA knockdown, cell death assay\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus ubiquitination assay with K48-linkage specificity and rescue experiment, single lab multiple methods\",\n      \"pmids\": [\"35091545\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TFG binds LC3C through a canonical LIR motif, which enables TFG to favor LC3C-ULK1 binding and thereby promote ULK1 puncta formation, omegasome formation, and autophagosome biogenesis. Fibroblasts from HSP patient with TFG R106C mutation show defects in both autophagy and ULK1 puncta accumulation.\",\n      \"method\": \"Co-immunoprecipitation, LIR motif mutagenesis, immunofluorescence, autophagosome formation assay, patient fibroblast analysis\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP with LIR mutagenesis and functional autophagy assays, validated in patient cells, single lab multiple methods\",\n      \"pmids\": [\"33932238\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TFG is required for virus-induced TBK1 activation and IRF3 phosphorylation/dimerization. TFG acts as a TRAF3-interacting protein that facilitates efficient recruitment of TRAF3 to MAVS following Sendai virus infection. TFG-TRAF3 complex also engages mTOR, enabling TBK1 to phosphorylate mTOR on serine 2159 to promote mTORC1 signaling and antiviral gene expression.\",\n      \"method\": \"siRNA/shRNA knockdown, co-immunoprecipitation, IRF3 phosphorylation/dimerization assay, mTOR phosphorylation assay, viral infection assay\",\n      \"journal\": \"PLoS pathogens\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus multiple functional signaling assays with knockdown, single lab multiple orthogonal methods\",\n      \"pmids\": [\"33411856\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"In addition to its role in ER secretory transport, TFG has an unexpected role in trafficking of Rab4A-positive recycling endosomes specifically within axons and dendrites of neurons. Impaired TFG function (R106C) delays biosynthetic secretory protein transport from the ER and compromises transport of endosomal cargoes, resulting in down-regulated inhibitory receptor signaling. Mitochondria and lysosome morphology/trafficking are unaffected.\",\n      \"method\": \"CRISPR-Cas9 rat model, primary cortical neuron culture, live-cell imaging, organelle trafficking assay, cargo-specific transport assay\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo CRISPR rat model validated by multiple in vitro neuronal assays with organelle-specific controls, single lab but highly rigorous\",\n      \"pmids\": [\"36161950\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Loss of TFG in motor neurons (vMNTFG KO mice) is sufficient to cause NMJ degeneration, motor function deterioration, and muscle atrophy. Muscle-specific TFG KO (MUSTFG KO) does not cause apparent motor impairment but elevates a denervation marker and inhibits Agrin-induced AChR clustering in C2C12 myotubes.\",\n      \"method\": \"Tissue-specific conditional knockout mice, motor function testing, NMJ morphology, immunohistochemistry, C2C12 cell assay\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — cell type-specific conditional KO with multiple in vivo and in vitro phenotypic readouts, single lab\",\n      \"pmids\": [\"35121777\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Disease-related mutations G269V and P285L in the low-complexity domain of TFG cause that domain to form amyloid fibrils. Cryo-EM structures confirm unmistakable amyloid architecture with double-protofilament cores; mutant residues stabilize the fibril structure and mutant sequences show increased amyloid propensity compared to wild-type.\",\n      \"method\": \"Cryo-electron microscopy structure determination, in vitro fibril formation assay\",\n      \"journal\": \"PNAS nexus\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — atomic-resolution cryo-EM structures of disease-mutant TFG fibrils, single lab\",\n      \"pmids\": [\"38077690\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"TFG regulates the rate of inner COPII coat (Sec23) recruitment to ER budding sites. In cells lacking TFG, Sec23 accumulates more rapidly at ER subdomains, potentially causing premature GTP hydrolysis on Sar1 and delaying anterograde secretory cargo trafficking regardless of cargo size.\",\n      \"method\": \"siRNA/CRISPR knockdown, live-cell imaging of Sec23 dynamics, secretory cargo trafficking assay\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct live-cell kinetic imaging of COPII coat dynamics with multiple cargo assays, single lab\",\n      \"pmids\": [\"38985515\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"TFG forms octameric ring complexes as determined by X-ray crystallography and cryo-EM. A network of electrostatic and hydrophobic interactions defines the interface between protomers. HSP-associated mutations in the PB1 domain disrupt this interface, destabilize octamers, and lead to axonopathy in vivo.\",\n      \"method\": \"X-ray crystallography, cryo-electron microscopy, in vitro ring complex assay, in vivo axonopathy model\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — atomic-resolution structural determination by two complementary methods plus in vivo functional validation, single lab\",\n      \"pmids\": [\"39574627\"],\n      \"is_preprint\": true\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"At physiological conditions TFG self-organizes into a hollow, anisotropic condensate that matches the dimensions of the ER-Golgi interface and is dynamically regulated across the cell cycle. Regularly spaced hydrophobic residues control the condensation mechanism, producing a porous condensate surface that acts as a molecular sieve: it allows access of COPII (anterograde coat) to the condensate interior while restricting COPI (retrograde coat), spatially compartmentalizing anterograde from retrograde carriers.\",\n      \"method\": \"Live-cell imaging, in vitro condensate reconstitution, size-exclusion/diffusion assay, hydrophobic residue mutagenesis, cell cycle manipulation\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro reconstitution of condensate with mutagenesis plus cellular imaging and functional sieving assay, published in peer-reviewed journal\",\n      \"pmids\": [\"40253417\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"FBXO45 E3 ubiquitin ligase promotes TFG ubiquitination at Lys103, increasing TFG stability. Stabilized TFG facilitates binding of transcription factor ATF2, leading to upregulation of NF-κB p65 expression and promoting migration and invasion in TP53-mutant HCC cells. TFG knockdown abrogates FBXO45-driven metastasis in vivo.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay (Lys103-specific), ATF2 binding assay, NF-κB reporter, in vivo xenograft metastasis model\",\n      \"journal\": \"JHEP reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus site-specific ubiquitination assay plus in vivo rescue, single lab multiple orthogonal methods\",\n      \"pmids\": [\"41030651\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Xenopus TFG (xTFG) selectively interacts with SH3 domains of Src, PLCγ, and the p85 subunit of PI3-kinase, identifying a functional SH3-binding motif in TFG.\",\n      \"method\": \"SH3 domain pulldown assay, transgenic Xenopus overexpression\",\n      \"journal\": \"Molecular reproduction and development\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — direct pulldown assay demonstrating SH3 binding selectivity, replicated across multiple SH3 domains, single lab\",\n      \"pmids\": [\"10861999\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"TFG is a multifunctional scaffold protein that self-assembles into octameric ring complexes and, at physiological conditions, forms a hollow condensate at the ER/ERGIC interface where it promotes COPII-mediated anterograde ER export by binding Sec23 to control coat dynamics, clusters COPII carriers, facilitates outer coat disassembly, and acts as a molecular sieve that spatially segregates anterograde from retrograde carriers; disease-causing mutations in its PB1 or coiled-coil domains disrupt oligomerization, impair secretory trafficking and ER homeostasis, and lead to neurodegeneration, while TFG additionally participates in autophagy (via LC3C-LIR interaction), antiviral innate immunity (via TRAF3-TBK1-IRF3 axis), ULK1 stability regulation, endosomal trafficking in neurons, and NF-κB signaling.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"TFG is a self-assembling scaffold protein that organizes the early secretory pathway by structuring the ER/ERGIC interface and tuning COPII coat dynamics [#10, #6]. It oligomerizes through its PB1 and coiled-coil domains into octameric, cup-like ring complexes that further polymerize and, at physiological conditions, self-organize into a hollow condensate matching the dimensions of the ER-Golgi interface; regularly spaced hydrophobic residues render this condensate a molecular sieve that admits the anterograde COPII coat while excluding retrograde COPI, spatially segregating the two carrier populations [#27, #28]. Functionally, TFG binds the inner COPII coat protein Sec23 through a C-terminal interface shared with the outer coat and the cargo receptor Tango1/cTAGE5, competing with these associations to promote outer coat dissociation and to control the rate of Sec23 recruitment to ER budding sites; it also tethers and clusters inner-coated carriers at the ER/ERGIC interface [#14, #26]. Through these activities TFG organizes transitional ER and ER exit sites, supports anterograde protein secretion (including the specialized export of large cargo such as procollagen), and maintains ER network morphology, with its localization and polymerization promoted in a Ca2+-dependent manner by ALG-2 [#6, #11, #10, #12]. Disease-causing mutations act on its assembly: PB1-domain (R22W) and coiled-coil (R106C) variants disrupt oligomerization and ring-complex compaction, impairing ER secretion and causing axonopathy and hereditary spastic paraplegia, while low-complexity-domain mutations (G269V, P285L) drive amyloid fibril formation that sequesters wild-type TFG and underlies CMT2-type neurodegeneration [#13, #16, #25, #27, #9]. Beyond the secretory pathway, TFG promotes autophagosome biogenesis by binding LC3C through a LIR motif to favor LC3C-ULK1 engagement and stabilizes ULK1 by competing with TRAF3-mediated K48-linked ubiquitination, and it modulates antiviral innate immunity by recruiting TRAF3 to MAVS and engaging the TBK1-IRF3 axis [#21, #20, #22]. TFG was originally identified as the N-terminal fusion partner in oncogenic chimeras (TFG-ALK, TRK-T3/TFG-NTRK1, TFG-RET), where its oligomerization domains mediate constitutive kinase activation and transformation [#0, #1, #19].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Established TFG as a recurrent fusion partner whose oligomerization domains confer constitutive activity on chimeric tyrosine kinases, the founding observation that revealed TFG's self-association capacity.\",\n      \"evidence\": \"cDNA cloning and in vitro tyrosine kinase assay of TFG-ALK chimeras; deletion mutagenesis and NIH3T3 transformation of TRK-T3 mapping the coiled-coil requirement\",\n      \"pmids\": [\"10556217\", \"9488046\", \"11943732\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not address the normal cellular function of full-length TFG\", \"Role of N-terminal/PB1 region in transformation only partly resolved\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Refined the structural determinants of TFG-driven transformation, showing that the PB1 domain and an SH2-binding motif beyond the coiled-coil contribute to complex formation, while parallel work mapped TFG's engagement of SH2/SH3-bearing signaling proteins.\",\n      \"evidence\": \"Deletion/site-specific mutagenesis and transformation assays; reciprocal co-IP with Grb2/Shc/PLC-gamma and SHP-1; SH3 pulldowns in Xenopus\",\n      \"pmids\": [\"12584559\", \"15557341\", \"30157421\", \"10861999\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Most signaling associations defined in the fusion-protein context, not endogenous TFG\", \"Functional consequence of SH3/SH2 binding for native TFG undefined\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"First linked TFG to inflammatory signaling, placing it within NF-kappaB-modulating complexes.\",\n      \"evidence\": \"Yeast two-hybrid, co-IP, and NF-kappaB reporter assays identifying NEMO and TANK interactions\",\n      \"pmids\": [\"16547966\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of NF-kappaB enhancement not resolved\", \"Stoichiometry within the NEMO complex unknown\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Defined TFG's core cellular function in ER export, showing the conserved ortholog directly couples SEC-16 with the COPII machinery at ER exit sites via oligomerization.\",\n      \"evidence\": \"C. elegans TFG-1 co-IP with SEC-16, hydrodynamic oligomer characterization, and RNAi depletion phenotypes\",\n      \"pmids\": [\"21478858\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Hexamer model later revised to octamer in mammals\", \"Direct cargo selectivity not yet addressed\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Provided the structural and functional framework for TFG as an ER/ERGIC scaffold, demonstrating self-assembling octameric cup-like polymers that cluster COPII carriers.\",\n      \"evidence\": \"3D electron microscopy, in vitro self-association, siRNA knockdown with secretion and live-cell imaging assays\",\n      \"pmids\": [\"25586378\", \"23479643\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular contacts with COPII components not yet mapped\", \"Atomic-resolution interface unresolved\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Resolved cargo selectivity and regulatory inputs, showing TFG is specifically required for large-cargo (procollagen) export and is recruited and polymerized at ERES by Ca2+-dependent ALG-2.\",\n      \"evidence\": \"siRNA cargo-specific secretion assays for procollagen vs soluble cargo; ALG-2 co-IP, in vitro cross-linking, and live imaging\",\n      \"pmids\": [\"27184855\", \"27813252\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How ALG-2/Ca2+ signaling integrates with secretory demand unclear\", \"Selectivity mechanism for large cargo not mechanistically defined at this stage\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Identified the direct molecular target of TFG on the COPII coat, establishing it as a regulator of coat dynamics through competition at the Sec23 interface.\",\n      \"evidence\": \"In vitro binding/competition assays with concentration-dependence, co-IP, and cellular vesicle-clustering assays mapping the Sec23/Tango1/cTAGE5 interface\",\n      \"pmids\": [\"28851831\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Kinetic consequences for Sar1 GTP hydrolysis not directly measured here\", \"Link between Sec23 binding and condensate organization not yet made\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Connected TFG assembly defects to neuronal disease at endogenous expression levels, showing the R106C ring-compaction defect impairs secretion and axon fasciculation.\",\n      \"evidence\": \"CRISPR-engineered human stem cells, secretion assays, and neuronal differentiation with axon fasciculation readouts\",\n      \"pmids\": [\"30157421\", \"25098539\", \"27601211\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cell-type basis of neuronal vulnerability incomplete\", \"How impaired oligomerization translates to axonal phenotype unresolved\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Expanded TFG's scaffold role into autophagy and ULK1 regulation, showing LC3C-LIR binding promotes autophagosome biogenesis and TFG protects ULK1 from TRAF3-mediated degradation.\",\n      \"evidence\": \"Co-IP, LIR/ubiquitination assays, autophagy flux measurements, and patient fibroblast analysis\",\n      \"pmids\": [\"33932238\", \"32910713\", \"35091545\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Interplay between ER-export and autophagy roles of TFG unclear\", \"Whether ULK1 stabilization is independent of ER scaffolding unknown\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Refined TFG's antiviral and neuronal trafficking roles, showing TRAF3 recruitment to MAVS and TBK1-IRF3/mTOR engagement, and an ER-export-independent role in Rab4A recycling-endosome trafficking in neurons.\",\n      \"evidence\": \"Knockdown with IRF3/mTOR phosphorylation assays and viral infection; CRISPR rat model with organelle-specific neuronal trafficking assays\",\n      \"pmids\": [\"33411856\", \"36161950\", \"35121777\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How a single scaffold partitions among ER, autophagy, immune, and endosomal functions unresolved\", \"Direct biochemical basis for endosomal role not defined\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Delivered atomic-resolution architecture and kinetic mechanism, defining the octameric ring interface disrupted by PB1 mutations and showing TFG sets the rate of Sec23 recruitment.\",\n      \"evidence\": \"X-ray crystallography and cryo-EM of ring complexes with in vivo axonopathy; live-cell kinetic imaging of Sec23 dynamics; cryo-EM of disease-mutant amyloid fibrils\",\n      \"pmids\": [\"39574627\", \"38985515\", \"38077690\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Octamer ring structure reported in a preprint\", \"Direct measurement of Sar1 GTP hydrolysis rate inferred, not shown\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Unified TFG's structural and functional roles into a condensate model, showing it forms a hollow biomolecular condensate acting as a molecular sieve to segregate anterograde from retrograde carriers, while a parallel cancer study defined an FBXO45-TFG-ATF2-NF-kappaB stabilization axis.\",\n      \"evidence\": \"In vitro condensate reconstitution, diffusion/sieving assays, hydrophobic-residue mutagenesis, cell-cycle manipulation; site-specific ubiquitination and in vivo metastasis assays\",\n      \"pmids\": [\"40253417\", \"41030651\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How condensate material properties are regulated in vivo across the cell cycle incompletely defined\", \"Relationship between FBXO45-driven stabilization and secretory function unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How a single self-assembling scaffold mechanistically coordinates its distinct roles in ER export, autophagy, innate immunity, and neuronal endosomal trafficking, and how condensate properties are tuned to physiological state, remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No integrated model partitioning TFG among its functions\", \"Regulatory inputs governing condensate assembly/disassembly in vivo undefined\", \"Mechanism linking endosomal trafficking role to the secretory scaffold unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [6, 10, 14]},\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [10, 27, 28]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [14, 26, 20]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [6, 7, 10, 11]},\n      {\"term_id\": \"GO:0005793\", \"supporting_discovery_ids\": [10, 12, 28]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [10, 14]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [6, 10, 11, 14]},\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [10, 14, 26]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [17, 21]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [8, 22]}\n    ],\n    \"complexes\": [\"COPII coat\", \"ER/ERGIC interface scaffold (TFG condensate)\"],\n    \"partners\": [\"SEC23\", \"SEC16\", \"PDCD6/ALG-2\", \"TANGO1/cTAGE5\", \"TRAF3\", \"ULK1\", \"MAP1LC3C\", \"TRIM25\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"tie","faith_supported":7,"faith_total":7,"faith_pct":100.0}}