{"gene":"DYNLT1","run_date":"2026-06-09T23:54:42","timeline":{"discoveries":[{"year":1996,"finding":"DYNLT1 (Tctex-1) is a stoichiometric 14-kDa light chain component of mammalian brain cytoplasmic dynein, co-sedimenting with microtubules, eluting with ATP (but not GTP), and immunoprecipitated by anti-dynein intermediate chain antibody.","method":"Peptide sequencing, sucrose density gradient sedimentation, ATP/GTP elution assays, immunoprecipitation with anti-intermediate chain monoclonal antibody","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — multiple orthogonal biochemical methods (peptide sequencing, sedimentation, immunoprecipitation) establishing stoichiometric dynein association","pmids":["8943288"],"is_preprint":false},{"year":1998,"finding":"Tctex-1 is present not only in cytoplasmic dynein but also in Chlamydomonas flagellar inner dynein arm I1 and in mouse sperm, supporting a role in flagellar dynein function relevant to meiotic drive.","method":"Genetic and biochemical dissection of Chlamydomonas flagellar axoneme, immunoblotting of fractionated dynein complexes","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic (Chlamydomonas mutants) plus biochemical fractionation identifying Tctex1 in inner arm I1, replicated across organisms","pmids":["9490726"],"is_preprint":false},{"year":1999,"finding":"Tctex-1 binds directly to the C-terminal cytoplasmic tail of rhodopsin, mediating dynein-dependent transport of rhodopsin-bearing vesicles along microtubules; retinitis pigmentosa-causing C-terminal rhodopsin mutations disrupt this interaction.","method":"In vitro pull-down assays, yeast two-hybrid, microtubule translocation assay, site-directed mutagenesis of rhodopsin C-terminus","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — multiple orthogonal methods (pull-down, yeast two-hybrid, functional transport assay, mutagenesis) in a single rigorous study","pmids":["10399916"],"is_preprint":false},{"year":1998,"finding":"Tctex-1 specifically interacts with the Src-family kinase p59fyn via the first 19 amino acids of Fyn (requiring two lysine residues), and co-localizes with Fyn at the cleavage furrow and mitotic spindles during cytokinesis in T cell hybridomas.","method":"Yeast two-hybrid cloning, GST pull-down from cell lysates, immunofluorescence confocal microscopy","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — yeast two-hybrid confirmed by GST pull-down and co-localization, single lab","pmids":["9712037"],"is_preprint":false},{"year":1998,"finding":"Tctex-1 interacts with Doc2α and Doc2β in cell-free and intact cell systems; overexpression of the Doc2 Tctex-1-binding domain alters intracellular localization of mannose 6-phosphate receptor and cathepsin D, implicating Tctex-1 in dynein-dependent vesicle transport from trans-Golgi network to late endosomes.","method":"Co-immunoprecipitation, GST pull-down, overexpression with subcellular localization of cargoes by immunofluorescence","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — reciprocal binding confirmed by multiple assays, dominant-negative approach links interaction to vesicle trafficking phenotype","pmids":["9804756"],"is_preprint":false},{"year":2001,"finding":"Tctex-1 forms a homodimer in solution and binds directly to a 19-residue fragment of the dynein intermediate chain (DIC) immediately following the second alternative splicing site; the DIC-binding peptide contains an R/K-R/K-X-X-R/K consensus motif shared by diverse Tctex-1 cargo proteins.","method":"NMR spectroscopy (backbone secondary structure, chemical shift titration), gel filtration, peptide titration assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structure determination plus peptide titration mapping the DIC binding site, single lab with multiple orthogonal NMR methods","pmids":["11148215"],"is_preprint":false},{"year":2001,"finding":"The cytoplasmic domain of poliovirus receptor CD155 associates with Tctex-1 via a SKCSR motif in the juxtamembrane region, confirmed biochemically and by co-immunoprecipitation, suggesting Tctex-1 links CD155-containing endocytic vesicles to the dynein motor for retrograde neuronal transport.","method":"Yeast two-hybrid, co-immunoprecipitation, domain mapping by deletion/site-directed mutagenesis","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — yeast two-hybrid confirmed by co-IP and motif mapping, single lab","pmids":["11751937"],"is_preprint":false},{"year":2001,"finding":"Tctex-1/Tctex2 family light chains exist as dimers (Tctex1) or monomers (Tctex2) in solution; Chlamydomonas Tctex1 dimerizes in vivo as shown by yeast two-hybrid; cross-linking of outer arm dynein reveals interaction of Tctex2 (LC2) with LC6.","method":"Gel filtration, native gel electrophoresis, yeast two-hybrid, chemical cross-linking with dimethylpimelimidate, immunoblotting","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple biochemical methods confirming dimer state and inter-subunit contacts, single lab","pmids":["11278908"],"is_preprint":false},{"year":2002,"finding":"DYNLT1 (Tctex-1) interacts with VDAC1 in vivo and in vitro; this interaction alters the electrophysiological properties of VDAC1 in planar lipid bilayer experiments (rTctex-1 slightly increases voltage-dependence of hVDAC1); the two proteins co-localize in HeLa cells.","method":"Sos-recruitment yeast two-hybrid, overlay assay with recombinant proteins, indirect immunofluorescence, EGFP fusion co-localization, planar lipid bilayer electrophysiology","journal":"The international journal of biochemistry & cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — interaction confirmed by overlay assay and functional electrophysiology readout, single lab with multiple orthogonal methods","pmids":["12009301"],"is_preprint":false},{"year":2003,"finding":"Tctex-1 interacts with the cytoplasmic tail of BMPR-II in an isoform-specific manner and is phosphorylated by BMPR-II; primary pulmonary hypertension-causing mutations in exon 12 of BMPR2 disrupt this phosphorylation.","method":"Yeast two-hybrid, co-immunoprecipitation, in vitro kinase assay, site-directed mutagenesis of BMPR-II, co-localization by immunofluorescence","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — kinase assay plus co-IP and mutagenesis, single lab","pmids":["14583445"],"is_preprint":false},{"year":2003,"finding":"Tctex-1 interacts directly with the COOH-terminal tail of the PTH/PTH-related protein receptor (PTHR); a bipartite 34-amino-acid binding motif in PTHR is required, and a GFP-fused PTHR mutant impaired in Tctex-1 binding shows decreased internalization rate in response to PTH in MDCK cells.","method":"Yeast two-hybrid, in vitro binding assay, site-directed mutagenesis of PTHR, internalization assay by live imaging in MDCK cells","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — interaction mapped by mutagenesis in vitro; functional internalization linked to Tctex-1 binding, single lab","pmids":["14575690"],"is_preprint":false},{"year":2004,"finding":"HSV-1 outer capsid protein VP26 binds dynein light chains Tctex-1 and RP3; VP26+ capsids microinjected into cells co-localize with Tctex-1 and microtubules and move toward the nucleus, whereas VP26− capsids do not, demonstrating VP26-mediated retrograde dynein-dependent transport.","method":"Yeast two-hybrid, in vitro pull-down, microinjection of recombinant capsids into live cells, fluorescence microscopy","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid confirmed by pull-down; functional transport demonstrated by microinjection assay with isogenic VP26+/- capsids","pmids":["15117959"],"is_preprint":false},{"year":2005,"finding":"NMR solution structure of the Chlamydomonas Tctex1 dimer reveals a strand-switched beta-sheet interface similar to LC8; structural analysis identifies the dynein intermediate chain binding site and predicts a mechanism for cargo attachment distinct from but convergent with LC8.","method":"NMR solution structure determination, structural comparison with LC8","journal":"Structure","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structure with functional site identification, single lab but high-resolution structural method","pmids":["15698565"],"is_preprint":false},{"year":2005,"finding":"Crystal structure of Drosophila TcTex-1 at 1.7 Å reveals a homodimeric domain-swapped fold nearly identical to LC8 despite no sequence homology; the N-terminus binds a crystallographic dimer as an antiparallel beta-strand at the same position as nNOS in LC8, suggesting TcTex-1 binds targets similarly to LC8.","method":"X-ray crystallography (MAD phasing, 1.7 Å), structural comparison with LC8-nNOS complex","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — high-resolution crystal structure with mechanistic interpretation of cargo-binding mode, single lab","pmids":["15701632"],"is_preprint":false},{"year":2005,"finding":"Tctex-1 interacts directly and selectively with N- and P/Q-type (but not L-type) voltage-gated Ca2+ channels; overexpression of the channel fragment containing the Tctex-1 binding domain in hippocampal neurons decreases surface expression of N- and P/Q-type channels and reduces Ca2+ current density.","method":"Co-immunoprecipitation, overexpression with immunostaining for surface channel levels, electrophysiology (Ca2+ current density measurement) in hippocampal neurons","journal":"Nature neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — binding confirmed by co-IP; functional effect on trafficking and currents demonstrated in neurons, single lab","pmids":["15768038"],"is_preprint":false},{"year":2006,"finding":"Phosphorylation of Tctex-1 at Ser82 (mimicked by S82E mutant) reduces its affinity for dynein intermediate chain without affecting rhodopsin binding, preventing incorporation into the dynein complex; S82E dominant-negative and S82A (dephospho-mimic) both cause mislocalization of rhodopsin in polarized MDCK cells, indicating that a phosphorylation-dependent assembly/disassembly cycle of Tctex-1 from dynein is required for apical cargo delivery.","method":"Velocity sedimentation, co-immunoprecipitation, phosphomimetic mutagenesis (S82E, S82A), immunofluorescence in polarized MDCK cells","journal":"Traffic","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — phosphomimetic mutagenesis combined with sedimentation and functional localization assay, multiple orthogonal methods in single lab","pmids":["16956385"],"is_preprint":false},{"year":2006,"finding":"Tctex-1 dimerization is obligatorily coupled to folding; unfolding follows a two-state mechanism (folded dimer → 2 unfolded monomers) with no stable monomeric intermediate, distinguishing it mechanistically from LC8 which shows a three-state mechanism.","method":"Equilibrium unfolding monitored by intrinsic fluorescence intensity, fluorescence anisotropy, circular dichroism; sedimentation equilibrium; chemical cross-linking","journal":"Biochemistry","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — multiple biophysical methods for thermodynamic characterization, single lab","pmids":["16734416"],"is_preprint":false},{"year":2007,"finding":"Gβγ binds Tctex-1 and competes with dynein intermediate chain for binding, segregating a dynein-free pool of Tctex-1; this Gβγ-Tctex-1 complex is endogenous in embryonic mouse brain and promotes neurite outgrowth independently of dynein.","method":"Co-immunoprecipitation from embryonic brain extracts, sucrose gradient fractionation, overexpression/dominant-negative studies in primary hippocampal neurons, neurite outgrowth assay","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 / Strong — endogenous complex confirmed by co-IP from brain; competition mechanism and dynein-free fractionation; functional neurite outgrowth assay — multiple orthogonal methods","pmids":["17491591"],"is_preprint":false},{"year":2008,"finding":"Tctex-1 mediates intracellular targeting of Mason-Pfizer monkey virus (M-PMV) matrix protein to a cytoplasmic assembly site; a single amino acid mutation (R55F) in MA buries the putative Tctex-1 binding motif, redirecting viral assembly from cytoplasm to plasma membrane.","method":"In vitro biochemical binding assays, NMR structure comparison of wt and R55F MA, mutagenesis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — structural and biochemical evidence linking conformational change in MA to Tctex-1 accessibility and assembly site targeting, single lab","pmids":["18647839"],"is_preprint":false},{"year":2009,"finding":"Tctex-1 (Dynlt1) acts as a negative regulator of Lfc (Arhgef2, a RhoGEF) in cortical neural precursors; Dynlt1 knockdown promotes neurogenesis and depletes cycling radial precursors, while Arhgef2 knockdown inhibits neurogenesis; double knockdown epistasis shows Tctex-1 antagonizes Lfc's proneurogenic actions and the two proteins regulate mitotic spindle orientation.","method":"shRNA knockdown in cortical precursors in culture and in utero electroporation, BrdU/EdU labeling, spindle orientation measurement, genetic epistasis (double knockdown)","journal":"Nature neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic epistasis in vivo plus multiple cellular assays establishing pathway position, replicated in vitro and in vivo","pmids":["19448628"],"is_preprint":false},{"year":2010,"finding":"Tctex-1 co-localizes and physically interacts with Lfc in neurons, inhibiting Lfc's GEF activity, decreasing Rho-GTP levels, and antagonizing Lfc-mediated inhibition of axon formation; this places Tctex-1 upstream of RhoA in neuronal polarization.","method":"Co-immunoprecipitation, RhoA activity assay (GTP-Rho pull-down), fluorescence co-localization, genetic knockdown, axon formation assay","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct interaction confirmed, GEF activity assay performed, pathway placement by knockdown, single lab","pmids":["20463241"],"is_preprint":false},{"year":2011,"finding":"Phospho-Thr94 Tctex-1 is recruited to ciliary transition zones prior to S-phase entry and drives both ciliary disassembly and cell cycle progression; phosphomimetic T94E accelerates cilium disassembly and S-phase entry; this function requires actin dynamics and is dispensable in non-ciliated cells.","method":"Phospho-specific antibody, phosphomimetic (T94E) and phospho-dead (T94A) mutant expression, siRNA knockdown, S-phase entry assay (BrdU), cilia length measurement, actin perturbation experiments, in vivo cortical neural progenitor analysis","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (phospho-specific detection, phosphomimetics, siRNA, in vivo cortical studies), replicated in multiple cell types","pmids":["21394082"],"is_preprint":false},{"year":2011,"finding":"Tctex-1 interacts with Rab3D in a GTP-dependent manner, co-occupies Rab3D vesicles in osteoclasts, associates with dynein and microtubules, and is required for bone resorption; Tctex-1 RNAi significantly impairs resorption capacity and mislocalizes Rab3D vesicles.","method":"Yeast two-hybrid, co-immunoprecipitation, GTP-dependence assay, immunofluorescence, siRNA knockdown, bone resorption pit assay","journal":"Molecular and cellular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — GTP-dependent binding confirmed by co-IP; functional knockdown with defined phenotype, single lab","pmids":["21262767"],"is_preprint":false},{"year":2011,"finding":"DYNLT1 interacts with VDAC1, and DYNLT1 knockdown aggravates hypoxia-induced mitochondrial permeabilization; DYNLT1 co-immunoprecipitates with VDAC1 and is closely associated with microtubules and VDAC1 by immunofluorescence in cardiomyocytes.","method":"Yeast two-hybrid, co-immunoprecipitation, immunofluorescence, siRNA knockdown, mitochondrial membrane potential and ATP assays","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — interaction confirmed by co-IP; functional knockdown links DYNLT1 to mitochondrial permeability, single lab","pmids":["22164227"],"is_preprint":false},{"year":2013,"finding":"Phosphorylation of DYNLT1 at Ser82 (S82E phosphomimetic) in hypoxia aggravates mitochondrial permeability transition and increases free tubulin (destabilizing microtubules), while S82A (dephospho-mimic) diminishes hypoxia-induced injury, demonstrating a regulatory role for S82 phosphorylation in microtubule stability and mitochondrial protection.","method":"Recombinant adenovirus expression of S82E and S82A mutants, mitochondrial membrane potential assay, cytochrome c release, ATP quantification, free/polymerized tubulin fractionation","journal":"Molecules and cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — phosphomimetic mutagenesis with multiple functional readouts in two cell lines, single lab","pmids":["24170091"],"is_preprint":false},{"year":2013,"finding":"DYNLT1 interacts with NUP98-HOXA9 (via the FG-repeat region) and with wild-type NUP98 and other FG-repeat nucleoporins; DYNLT1 knockdown reduces NUP98-HOXA9-dependent transcriptional activation and inhibits NUP98-HOXA9-induced proliferation of CD34+ hematopoietic cells; DYNLT1 localizes to the nuclear periphery co-localizing with nuclear pore complexes.","method":"Yeast two-hybrid, in vitro pull-down, co-immunoprecipitation, deletion mapping, RNAi knockdown, transcription reporter assay, hematopoietic cell proliferation assay, immunofluorescence","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — multiple binding assays confirmed; functional knockdown with two orthogonal phenotypic readouts, single lab","pmids":["23840580"],"is_preprint":false},{"year":2015,"finding":"C. trachomatis inclusion membrane protein CT850 interacts with DYNLT1 via an R/K-R/K-X-X-R/K motif; CT850 localizes to the MTOC in a DYNLT1-binding-domain-dependent manner; DYNLT1 is enriched at CT850 foci on the inclusion membrane; depletion of DYNLT1 disrupts inclusion association with centrosomes.","method":"Yeast two-hybrid screen, co-localization by immunofluorescence, site-directed mutagenesis of CT850 binding motif, siRNA knockdown of DYNLT1","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — motif mutagenesis and knockdown link interaction to centrosomal positioning phenotype, single lab","pmids":["25944661"],"is_preprint":false},{"year":2015,"finding":"Tctex-1 associates with unattached kinetochores independently of dynein; Tctex-1 knockdown causes prolonged mitotic arrest and chromosome missegregation; kinetochore localization requires the Ndc80 complex but not the ZW10-dynein pathway; Tctex-1 knockdown does not affect dynein localization or function at the kinetochore.","method":"siRNA knockdown, immunofluorescence for kinetochore markers, time-lapse microscopy, chromosome segregation assay, epistasis with ZW10 and Ndc80 complex depletion","journal":"Cell cycle","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis placing Tctex-1 in Ndc80 but not ZW10 pathway; functional knockdown phenotype, single lab","pmids":["25928583"],"is_preprint":false},{"year":2015,"finding":"DYNLT1 forms a tripartite complex with dynein intermediate chain and RagA; NMR spectroscopy distinguishes the DIC-binding residues on DYNLT1 from the RagA-binding residues; a β-strand within the RagA G3 box mediates association with DYNLT1.","method":"NMR spectroscopy (residue-level mapping of binding sites), yeast two-hybrid, pull-down assays","journal":"The FEBS journal","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — NMR mapping of distinct binding sites on DYNLT1 for two ligands, single lab","pmids":["26227614"],"is_preprint":false},{"year":2016,"finding":"The hydrophobic groove of DYNLT1 accommodates dynein intermediate chain and diverse cargo peptides; pepscan mutagenesis defines the consensus recognition sequence for the canonical binding groove; NMR structure of human DYNLT1 in complex with dynein intermediate chain is determined; DYNLT1 functions as a molecular dimerization engine; evidence for a dual binding mode for Lfc and PTHR.","method":"Pepscan (positional scanning mutagenesis), NMR spectroscopy (solution structure of mammalian DYNLT1-DIC complex), biochemical binding assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR solution structure of mammalian complex plus systematic pepscan mutagenesis defining recognition specificity, single lab","pmids":["27502274"],"is_preprint":false},{"year":2018,"finding":"Desmoglein 1 (Dsg1) interacts with Tctex-1 and cortactin; Tctex-1 ensures correct membrane compartmentalization of Dsg1-containing desmosomes, enabling cortactin/Arp2/3-dependent perijunctional actin polymerization and decreased E-cadherin tension, thereby promoting keratinocyte delamination during epidermal stratification.","method":"Co-immunoprecipitation, RNAi knockdown, live imaging, FRAP, traction force microscopy, immunofluorescence, overexpression in simple epithelial cells","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (co-IP, knockdown, force microscopy, live imaging) linking Tctex-1 to Dsg1 compartmentalization and actin-dependent delamination","pmids":["29535305"],"is_preprint":false},{"year":2018,"finding":"Tctex-1 interacts with KIM-1 at baseline but dissociates within 90 min of efferocytosis initiation; this dissociation requires actin and microtubule polymerization; Tctex-1 knockdown inhibits efferocytosis comparably to KIM-1 knockdown; KIM-1 expression inhibits phosphorylation of Tctex-1 at T94, and the T94E phosphomimetic shows reduced binding to KIM-1.","method":"Yeast two-hybrid, co-immunoprecipitation, confocal imaging, shRNA knockdown, efferocytosis assay, pharmacological disruption of cytoskeleton","journal":"Journal of cellular physiology","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — interaction with functional dissociation kinetics confirmed; knockdown phenotype established; T94 phospho-regulation of interaction demonstrated, single lab","pmids":["29693725"],"is_preprint":false},{"year":2020,"finding":"Exosomal miR-15b-3p targets DYNLT1 mRNA (confirmed by dual-luciferase reporter), suppressing DYNLT1 expression and downstream Caspase-9 and Caspase-3, thereby inhibiting apoptosis and promoting gastric cancer cell migration, invasion and proliferation in vitro and tumor growth in vivo.","method":"Dual-luciferase reporter assay, Western blotting, qRT-PCR, exosome transfer with PKH26/GFP-CD63 labeling, xenograft tumor models","journal":"Journal of experimental & clinical cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct 3'UTR targeting validated by luciferase assay; pathway placement through Caspase-3/9 measurement upon DYNLT1 knockdown, single lab","pmids":["32039741"],"is_preprint":false},{"year":2020,"finding":"Tctex-1 augments PTHR-mediated Gs/adenylyl cyclase signaling by directly binding adenylyl cyclase type 6 (AC6) and activating AC independently of its binding to PTHR.","method":"Co-immunoprecipitation (Tctex-1 with AC6), cAMP assay in cells expressing Tctex-1 with/without PTHR, dominant-negative and overexpression approaches","journal":"Journal of pharmacological sciences","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — direct binding to AC6 confirmed by co-IP; functional cAMP elevation assay; single lab","pmids":["33357773"],"is_preprint":false},{"year":2023,"finding":"DYNLT1 co-localizes with VDAC1 on mitochondria and stabilizes VDAC1 by inhibiting E3 ligase Parkin-mediated ubiquitination and degradation of VDAC1, thereby promoting mitochondrial metabolism (membrane potential, ATP production) and breast cancer cell proliferation/invasion in vitro and tumor development in vivo.","method":"Co-immunoprecipitation, ubiquitination assay, mitochondrial membrane potential measurement, ATP quantification, in vivo xenograft, shRNA knockdown and overexpression","journal":"Molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ubiquitination assay and co-IP establish mechanism; in vivo validation, single lab","pmids":["37280526"],"is_preprint":false},{"year":2023,"finding":"MAST4 kinase localizes to the primary cilium, binds the kinase domain of Tctex-1, and phosphorylates Tctex-1 at Thr94; MAST4 suppression blocks serum-induced ciliary resorption and phospho-(T94)Tctex-1 recruitment to the ciliary base; MAST4 is required for Cdc42 activation and Rab5-mediated periciliary membrane endocytosis during ciliary resorption.","method":"siRNA/shRNA knockdown, overexpression of catalytic-dead MAST4 mutants, phospho-specific immunofluorescence, co-immunoprecipitation (Tctex-1 with MAST4 kinase domain), Cdc42 activation assay, Rab5 endocytosis assay","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 2 / Strong — kinase-dead mutagenesis plus co-IP plus multiple downstream functional assays (cilia, Cdc42, endocytosis) identifying MAST4 as the Thr94 kinase, single lab with multiple orthogonal methods","pmids":["37726137"],"is_preprint":false},{"year":2025,"finding":"DYNLT1 knockout in mice (CRISPR/Cas9) induces spontaneous atrial fibrillation associated with reduced TMCO1 distribution in the ER of atrial cardiomyocytes, leading to ER calcium overload; DYNLT1 deletion also causes downregulation of gap junction proteins and increased cardiomyocyte apoptosis.","method":"CRISPR/Cas9 knockout mice, electrocardiography, echocardiography, histology, mass spectrometry, immunofluorescence for TMCO1 and gap junction proteins","journal":"Biology open","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO model with mechanistic follow-up identifying TMCO1 mislocalization and ER calcium overload, single lab","pmids":["40457945"],"is_preprint":false},{"year":2025,"finding":"Quantitative ITC combined with Bayesian inference of a seven-state binding model reveals that Tctex-1 and LC8 display opposing cooperativities (positive and negative) in assembling with the dynein intermediate chain, and identifies previously inaccessible half-bound states that may regulate dynein cargo attachment and release.","method":"Isothermal titration calorimetry (39 experiments), hierarchical Bayesian inference, global thermodynamic modeling of IC/LC8/Tctex-1 assembly","journal":"bioRxiv","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — rigorous quantitative thermodynamic analysis with multiple ITC datasets; preprint, not yet peer-reviewed","pmids":["bio_10.1101_2025.07.14.664506"],"is_preprint":true}],"current_model":"DYNLT1 (Tctex-1) is a homodimeric 14-kDa dynein light chain that assembles into the cytoplasmic dynein complex by binding a conserved R/K-R/K-X-X-R/K motif on the dynein intermediate chain; it serves as a direct cargo adaptor linking diverse membrane receptors (rhodopsin, CD155, PTHR, BMPR-II, N/P/Q-type Ca2+ channels), viral proteins (HSV VP26, flavivirus M, M-PMV MA), and signalling molecules (Doc2, Rab3D, RagA, Lfc, VDAC1) to the dynein motor for minus-end-directed transport, while a phosphorylation-regulated dissociation cycle (Ser82 phosphorylation releases it from dynein; MAST4-mediated Thr94 phosphorylation recruits it to the ciliary transition zone) controls cargo delivery and ciliary resorption, and a dynein-free pool complexed with Gβγ independently regulates actin/microtubule dynamics to drive neurite outgrowth, neurogenesis, spindle orientation, kinetochore-microtubule attachment, and—through VDAC1 stabilization against Parkin-mediated ubiquitination—mitochondrial metabolism."},"narrative":{"mechanistic_narrative":"DYNLT1 (Tctex-1) is a homodimeric 14-kDa light chain of mammalian cytoplasmic dynein that functions as a cargo adaptor coupling membrane receptors and signalling proteins to the minus-end-directed microtubule motor [PMID:8943288, PMID:10399916]. It is a stoichiometric, ATP-elutable component of brain cytoplasmic dynein and also assembles into flagellar inner-arm dynein [PMID:8943288, PMID:9490726]. Structurally, Tctex-1 adopts a domain-swapped, dimeric fold convergent with LC8 despite lacking sequence homology, and binds a 19-residue segment of the dynein intermediate chain (DIC) bearing an R/K-R/K-X-X-R/K consensus that is shared by its cargoes [PMID:11148215, PMID:15701632, PMID:27502274]. Through this hydrophobic groove it directly engages a broad set of cargoes—rhodopsin, the poliovirus receptor CD155, PTH/PTHrP receptor, BMPR-II, N- and P/Q-type Ca2+ channels, Doc2, Rab3D, and the small GTPase RagA—linking these receptors and vesicles to dynein for retrograde and polarized transport [PMID:10399916, PMID:11751937, PMID:14583445, PMID:14575690, PMID:15768038, PMID:21262767, PMID:26227614]. Cargo loading is gated by phosphorylation: Ser82 phosphorylation lowers DIC affinity and ejects Tctex-1 from the motor, and a phospho-cycle is required for correct apical delivery of rhodopsin [PMID:16956385]. Independently of dynein, a Gβγ-bound pool drives neurite outgrowth, and Tctex-1 antagonizes the RhoGEF Lfc to control RhoA signalling, neurogenesis, and mitotic spindle orientation [PMID:17491591, PMID:19448628, PMID:20463241]. MAST4-mediated Thr94 phosphorylation recruits Tctex-1 to the ciliary transition zone to drive ciliary resorption and S-phase entry via actin dynamics and Cdc42/Rab5-dependent endocytosis [PMID:21394082, PMID:37726137]. Tctex-1 also localizes to unattached kinetochores via the Ndc80 complex to ensure faithful chromosome segregation, and stabilizes mitochondrial VDAC1 against Parkin-mediated ubiquitination to support mitochondrial metabolism [PMID:25928583, PMID:37280526]. Disease-linked roles include disruption of the rhodopsin interaction by retinitis pigmentosa mutations and of BMPR-II phosphorylation by primary pulmonary hypertension mutations [PMID:10399916, PMID:14583445].","teleology":[{"year":1996,"claim":"Established that Tctex-1 is a genuine, stoichiometric subunit of cytoplasmic dynein rather than a loosely associated factor, defining it as part of the motor itself.","evidence":"Peptide sequencing, sucrose gradient sedimentation, ATP/GTP elution, and anti-DIC immunoprecipitation of brain dynein","pmids":["8943288"],"confidence":"High","gaps":["Did not map the DIC contact site","Cargo specificity unaddressed"]},{"year":1998,"claim":"Showed the same light chain operates in both cytoplasmic and flagellar dynein across organisms, broadening its motor association beyond mammalian cytoplasm.","evidence":"Genetic/biochemical dissection of Chlamydomonas axonemal dynein and immunoblotting of sperm fractions","pmids":["9490726"],"confidence":"High","gaps":["Functional contribution to flagellar motility not isolated","Relation to meiotic drive remained correlative"]},{"year":1999,"claim":"Provided the first direct cargo: Tctex-1 binds the rhodopsin C-terminal tail and links rhodopsin vesicles to dynein, establishing it as a receptor-to-motor adaptor and connecting it to retinitis pigmentosa.","evidence":"Yeast two-hybrid, pull-down, microtubule translocation assay, and rhodopsin C-terminus mutagenesis","pmids":["10399916"],"confidence":"High","gaps":["In vivo transport requirement in photoreceptors not tested","Whether binding is direct to dynein-incorporated Tctex-1 vs free pool unresolved"]},{"year":2001,"claim":"Defined the molecular logic of cargo recognition by mapping the homodimeric Tctex-1 to a 19-residue DIC peptide containing an R/K-R/K-X-X-R/K motif shared with cargoes.","evidence":"NMR chemical-shift titration, gel filtration, and peptide titration","pmids":["11148215"],"confidence":"High","gaps":["How cargo and DIC binding are coordinated not addressed","No high-resolution complex structure yet"]},{"year":2001,"claim":"Expanded the cargo repertoire to additional membrane receptors, supporting a general adaptor role rather than a rhodopsin-specific one.","evidence":"Yeast two-hybrid and co-IP mapping of CD155 SKCSR juxtamembrane motif","pmids":["11751937"],"confidence":"Medium","gaps":["Retrograde neuronal transport of CD155 not directly demonstrated","Single lab"]},{"year":2005,"claim":"Resolved the Tctex-1 fold at high resolution, revealing convergent evolution with LC8 and a shared cargo-binding mode despite no sequence homology.","evidence":"NMR solution structure (Chlamydomonas) and 1.7 Å crystal structure (Drosophila) with comparison to LC8-nNOS","pmids":["15698565","15701632"],"confidence":"High","gaps":["Mammalian DIC-bound structure not yet solved","Functional consequence of fold for specificity inferred, not tested"]},{"year":2006,"claim":"Identified Ser82 phosphorylation as a switch that ejects Tctex-1 from dynein without disturbing cargo binding, establishing a phospho-gated assembly/disassembly cycle needed for cargo delivery.","evidence":"Phosphomimetic S82E/S82A mutagenesis, velocity sedimentation, co-IP, and rhodopsin localization in polarized MDCK cells","pmids":["16956385"],"confidence":"High","gaps":["Kinase responsible for Ser82 not identified","Spatiotemporal regulation of the cycle unknown"]},{"year":2007,"claim":"Revealed a dynein-independent function: Gβγ competes with DIC to capture a free Tctex-1 pool that drives neurite outgrowth, separating motor adaptor and signalling roles.","evidence":"Co-IP from embryonic brain, sucrose gradient fractionation, and neurite outgrowth assays in hippocampal neurons","pmids":["17491591"],"confidence":"High","gaps":["Downstream effectors of the Gβγ-Tctex-1 complex incomplete","How the two pools are partitioned in vivo unclear"]},{"year":2009,"claim":"Placed Tctex-1 in a neurogenic signalling pathway as a negative regulator of the RhoGEF Lfc, controlling spindle orientation and the balance between precursor cycling and neurogenesis.","evidence":"shRNA knockdown in vitro and by in utero electroporation, BrdU/EdU labeling, spindle measurement, and double-knockdown epistasis","pmids":["19448628"],"confidence":"High","gaps":["Whether this role requires dynein or the free pool unresolved at this stage","Direct biochemical Lfc interaction shown later"]},{"year":2010,"claim":"Mechanistically grounded the Lfc antagonism by showing Tctex-1 directly binds Lfc, inhibits its GEF activity, and lowers RhoA-GTP to promote axon formation.","evidence":"Co-IP, RhoA GTP pull-down activity assay, co-localization, and axon formation assays in neurons","pmids":["20463241"],"confidence":"Medium","gaps":["Structural basis of Lfc inhibition unknown","Single lab"]},{"year":2011,"claim":"Identified a second regulatory phosphosite, Thr94, whose modification recruits Tctex-1 to the ciliary transition zone to couple ciliary disassembly with cell-cycle progression via actin dynamics.","evidence":"Phospho-specific antibody, T94E/T94A mutants, siRNA, S-phase and cilia-length assays, and in vivo cortical progenitor analysis","pmids":["21394082"],"confidence":"High","gaps":["Thr94 kinase unidentified at this stage","Mechanistic link to actin not fully defined"]},{"year":2011,"claim":"Extended adaptor function to GTP-dependent vesicular cargo by linking Rab3D-bearing vesicles to dynein, required for osteoclast bone resorption.","evidence":"Yeast two-hybrid, GTP-dependent co-IP, immunofluorescence, siRNA, and bone resorption pit assay","pmids":["21262767"],"confidence":"Medium","gaps":["Direct transport of Rab3D vesicles by dynein not visualized in real time","Single lab"]},{"year":2013,"claim":"Connected Tctex-1 to mitochondrial regulation and microtubule stability, with Ser82 phosphorylation aggravating hypoxic permeability transition through increased free tubulin.","evidence":"VDAC1 co-IP, S82E/S82A adenoviral expression, mitochondrial potential/ATP/cytochrome c assays, tubulin fractionation in cardiomyocytes","pmids":["12009301","22164227","24170091"],"confidence":"Medium","gaps":["Whether VDAC1 effect is dynein-dependent unclear","Mechanism linking S82 to tubulin not defined"]},{"year":2013,"claim":"Revealed a nuclear-periphery role: Tctex-1 binds FG-repeat nucleoporins and NUP98-HOXA9 to support oncogenic transcription and hematopoietic proliferation.","evidence":"Yeast two-hybrid, pull-down, co-IP, deletion mapping, RNAi, reporter and proliferation assays, immunofluorescence","pmids":["23840580"],"confidence":"Medium","gaps":["Whether this is dynein-dependent unknown","Physiological relevance beyond leukemic context untested"]},{"year":2015,"claim":"Demonstrated dynein-independent kinetochore function: Tctex-1 localizes to unattached kinetochores via the Ndc80 complex (not the ZW10-dynein pathway) and is needed for accurate chromosome segregation.","evidence":"siRNA, kinetochore-marker immunofluorescence, time-lapse, segregation assays, epistasis with ZW10 and Ndc80 depletion","pmids":["25928583"],"confidence":"Medium","gaps":["Molecular role at the kinetochore unresolved","Single lab"]},{"year":2015,"claim":"Showed Tctex-1 can simultaneously engage DIC and a second ligand (RagA) at distinct surfaces, supporting a tripartite cargo-loading architecture and pathogen hijacking via the same recognition motif.","evidence":"NMR residue-level mapping of separate DIC and RagA sites; yeast two-hybrid and motif mutagenesis of Chlamydia CT850","pmids":["26227614","25944661"],"confidence":"Medium","gaps":["Functional output of RagA-Tctex-1-dynein complex unclear","In vivo simultaneous occupancy not shown"]},{"year":2016,"claim":"Defined the recognition code of the canonical binding groove and solved the mammalian DYNLT1-DIC complex, formalizing Tctex-1 as a dimerization engine with a dual cargo-binding mode.","evidence":"Pepscan positional mutagenesis and NMR solution structure of the human DYNLT1-DIC complex","pmids":["27502274"],"confidence":"High","gaps":["How phosphorylation alters groove engagement structurally not resolved","Single lab"]},{"year":2018,"claim":"Linked Tctex-1 to actin-based epithelial morphogenesis by controlling desmosomal Dsg1 compartmentalization and perijunctional actin polymerization during keratinocyte delamination.","evidence":"Co-IP, RNAi, FRAP, traction force microscopy, and live imaging","pmids":["29535305"],"confidence":"High","gaps":["Whether dynein is required not established","Connection to the Gβγ/cytoskeletal pool not tested"]},{"year":2018,"claim":"Showed Thr94 phosphorylation gates a receptor interaction (KIM-1) whose actin/microtubule-dependent dissociation drives efferocytosis, generalizing phospho-regulated cargo release.","evidence":"Yeast two-hybrid, co-IP dissociation kinetics, shRNA, efferocytosis assays, T94E mutant binding","pmids":["29693725"],"confidence":"Medium","gaps":["Kinase/phosphatase controlling T94 in this context not defined","Single lab"]},{"year":2023,"claim":"Identified MAST4 as the Thr94 kinase, completing the upstream regulation of ciliary resorption through Cdc42 activation and Rab5-mediated periciliary endocytosis.","evidence":"Kinase-dead MAST4 mutants, co-IP with the kinase domain, phospho-specific immunofluorescence, Cdc42 and Rab5 functional assays","pmids":["37726137"],"confidence":"High","gaps":["Upstream signals activating MAST4 unclear","Ser82 kinase still unidentified"]},{"year":2023,"claim":"Provided a mechanism for the mitochondrial role by showing DYNLT1 stabilizes VDAC1 by blocking Parkin-mediated ubiquitination, promoting metabolism and tumor growth.","evidence":"Co-IP, ubiquitination assay, mitochondrial potential/ATP measurement, shRNA/overexpression, and xenografts","pmids":["37280526"],"confidence":"Medium","gaps":["How DYNLT1 binding occludes Parkin not structurally defined","Single lab"]},{"year":2025,"claim":"Provided in vivo loss-of-function evidence: DYNLT1 knockout mice develop atrial fibrillation via TMCO1 mislocalization and ER calcium overload, tying the protein to cardiac homeostasis.","evidence":"CRISPR/Cas9 knockout mice, ECG/echocardiography, mass spectrometry, and TMCO1/gap-junction immunofluorescence","pmids":["40457945"],"confidence":"Medium","gaps":["Whether TMCO1 mislocalization is a direct dynein-transport defect untested","Single lab"]},{"year":null,"claim":"How the two regulatory phosphosites, distinct cargo classes, and the dynein-bound versus free pools are coordinately switched in a single cell to dictate cargo loading versus signalling remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified structural model of phospho-gated DIC versus cargo occupancy","Ser82 kinase unidentified","Quantitative rules partitioning dynein-bound and Gβγ-bound pools in vivo unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[2,5,29]},{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[0,24,30]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[20,33,34]},{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[0,5,13]}],"localization":[{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[0,23]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[21,35]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[8,23,34]},{"term_id":"GO:0005635","term_label":"nuclear envelope","supporting_discovery_ids":[25]},{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[26]},{"term_id":"GO:0005694","term_label":"chromosome","supporting_discovery_ids":[27]}],"pathway":[{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[2,4,15]},{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[4,11,22]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[17,20,33]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[21,27]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[19,30]}],"complexes":["cytoplasmic dynein complex","flagellar inner-arm dynein I1"],"partners":["DYNC1I (DYNEIN INTERMEDIATE CHAIN)","RHO (RHODOPSIN)","BMPR2","RAGA","LFC/ARHGEF2","VDAC1","GNB/GNG (GΒΓ)","MAST4"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P63172","full_name":"Dynein light chain Tctex-type 1","aliases":["Protein CW-1","T-complex testis-specific protein 1 homolog"],"length_aa":113,"mass_kda":12.5,"function":"Component of dynein, a family of motor proteins essential for movement along microtubules (By similarity). Required for structural and functional integrity of cilia (By similarity). Acts as one of several non-catalytic accessory components of the cytoplasmic dynein 1 complex that are thought to be involved in linking dynein to cargos and to adapter proteins that regulate dynein function. Cytoplasmic dynein 1 acts as a motor for the intracellular retrograde motility of vesicles and organelles along microtubules. Binds to transport cargos and is involved in apical cargo transport such as rhodopsin-bearing vesicles in polarized epithelia Plays a role in neuronal morphogenesis; the function is independent of cytoplasmic dynein and seems to be coupled to regulation of the actin cytoskeleton by enhancing Rac1 activity. The function in neurogenesis may be regulated by association with a G-protein beta-gamma dimer. May function as a receptor-independent activator of heterotrimeric G-protein signaling; the activation appears to be independent of a nucleotide exchange. Plays a role in regulating neurogenesis; inhibits the genesis of neurons from precursor cells during cortical development presumably by antagonizing ARHGEF2. Involved in the regulation of mitotic spindle orientation (By similarity). Unrelated to the role in retrograde microtubule-associated movement may play a role in the dimerization of cytoplasmic proteins/domains such as for ACVR2B. Binds to the cytoplasmic domain of ACVR2B and, in vitro, inhibits ACVR2B signaling (PubMed:27502274) (Microbial infection) Is involved in intracellular targeting of D-type retrovirus gag polyproteins to the cytoplasmic assembly site","subcellular_location":"Golgi apparatus; Cytoplasm; Cytoplasm, cytoskeleton, spindle","url":"https://www.uniprot.org/uniprotkb/P63172/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/DYNLT1","classification":"Not Classified","n_dependent_lines":80,"n_total_lines":1208,"dependency_fraction":0.06622516556291391},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"DYNC1H1","stoichiometry":10.0},{"gene":"DYNC1I2","stoichiometry":10.0},{"gene":"DYNC1LI1","stoichiometry":10.0},{"gene":"DYNC2LI1","stoichiometry":4.0},{"gene":"DYNLL2","stoichiometry":4.0},{"gene":"CAPZB","stoichiometry":0.2},{"gene":"CLASP1","stoichiometry":0.2},{"gene":"CLASP2","stoichiometry":0.2},{"gene":"CLIP1","stoichiometry":0.2},{"gene":"DYNC1LI2","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/DYNLT1","total_profiled":1310},"omim":[{"mim_id":"621278","title":"CHROMOSOME 4 OPEN READING FRAME 36; C4ORF36","url":"https://www.omim.org/entry/621278"},{"mim_id":"617353","title":"DYNEIN, LIGHT CHAIN, TCTEX-TYPE, 2B; DYNLT2B","url":"https://www.omim.org/entry/617353"},{"mim_id":"614556","title":"AT-RICH INTERACTION DOMAIN-CONTAINING PROTEIN 1B; ARID1B","url":"https://www.omim.org/entry/614556"},{"mim_id":"604350","title":"RAS-ASSOCIATED PROTEIN RAB3D; RAB3D","url":"https://www.omim.org/entry/604350"},{"mim_id":"601554","title":"DYNEIN, LIGHT CHAIN, TCTEX TYPE, 1; DYNLT1","url":"https://www.omim.org/entry/601554"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Cytosol","reliability":"Approved"},{"location":"Acrosome","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/DYNLT1"},"hgnc":{"alias_symbol":["Tctex-1","TCTEX1"],"prev_symbol":["TCTEL1"]},"alphafold":{"accession":"P63172","domains":[{"cath_id":"3.30.1140.40","chopping":"1-113","consensus_level":"medium","plddt":95.035,"start":1,"end":113}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P63172","model_url":"https://alphafold.ebi.ac.uk/files/AF-P63172-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P63172-F1-predicted_aligned_error_v6.png","plddt_mean":95.12},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=DYNLT1","jax_strain_url":"https://www.jax.org/strain/search?query=DYNLT1"},"sequence":{"accession":"P63172","fasta_url":"https://rest.uniprot.org/uniprotkb/P63172.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P63172/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P63172"}},"corpus_meta":[{"pmid":"10399916","id":"PMC_10399916","title":"Rhodopsin's 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journal","url":"https://pubmed.ncbi.nlm.nih.gov/26227614","citation_count":11,"is_preprint":false},{"pmid":"16734416","id":"PMC_16734416","title":"Folding is coupled to dimerization of Tctex-1 dynein light chain.","date":"2006","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/16734416","citation_count":11,"is_preprint":false},{"pmid":"27502274","id":"PMC_27502274","title":"Molecular Basis for the Protein Recognition Specificity of the Dynein Light Chain DYNLT1/Tctex1: CHARACTERIZATION OF THE INTERACTION WITH ACTIVIN RECEPTOR IIB.","date":"2016","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/27502274","citation_count":10,"is_preprint":false},{"pmid":"29693725","id":"PMC_29693725","title":"Tctex-1, a novel interaction partner of Kidney Injury Molecule-1, is required for efferocytosis.","date":"2018","source":"Journal of cellular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/29693725","citation_count":8,"is_preprint":false},{"pmid":"37726137","id":"PMC_37726137","title":"MAST4 promotes primary ciliary resorption through phosphorylation of Tctex-1.","date":"2023","source":"Life science alliance","url":"https://pubmed.ncbi.nlm.nih.gov/37726137","citation_count":8,"is_preprint":false},{"pmid":"23840580","id":"PMC_23840580","title":"Dynein Light Chain 1 (DYNLT1) Interacts with Normal and Oncogenic Nucleoporins.","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23840580","citation_count":8,"is_preprint":false},{"pmid":"29094416","id":"PMC_29094416","title":"MAP6 interacts with Tctex1 and Cav 2.2/N-type calcium channels to regulate calcium signalling in neurons.","date":"2017","source":"The European journal of neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/29094416","citation_count":8,"is_preprint":false},{"pmid":"30091292","id":"PMC_30091292","title":"MAP4 regulates Tctex-1 and promotes the migration of epidermal cells in hypoxia.","date":"2018","source":"Experimental dermatology","url":"https://pubmed.ncbi.nlm.nih.gov/30091292","citation_count":7,"is_preprint":false},{"pmid":"26410677","id":"PMC_26410677","title":"Cannabinoid receptor 2 expression modulates Gβ(1)γ(2) protein interaction with the activator of G protein signalling 2/dynein light chain protein Tctex-1.","date":"2015","source":"Biochemical pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/26410677","citation_count":7,"is_preprint":false},{"pmid":"37081842","id":"PMC_37081842","title":"Identification of DYNLT1 associated with proliferation, relapse, and metastasis in breast cancer.","date":"2023","source":"Frontiers in medicine","url":"https://pubmed.ncbi.nlm.nih.gov/37081842","citation_count":6,"is_preprint":false},{"pmid":"29500373","id":"PMC_29500373","title":"Structure based function-annotation of hypothetical protein MGG_01005 from Magnaporthe oryzae reveals it is the dynein light chain orthologue of dynlt1/3.","date":"2018","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/29500373","citation_count":5,"is_preprint":false},{"pmid":"33357773","id":"PMC_33357773","title":"Tctex-1 augments G protein-coupled receptor-mediated Gs signaling by activating adenylyl cyclase.","date":"2020","source":"Journal of pharmacological sciences","url":"https://pubmed.ncbi.nlm.nih.gov/33357773","citation_count":3,"is_preprint":false},{"pmid":"28970129","id":"PMC_28970129","title":"Tctex1 plays a key role in the α-synuclein autophagy lysosomal degradation pathway.","date":"2017","source":"Neuroscience letters","url":"https://pubmed.ncbi.nlm.nih.gov/28970129","citation_count":2,"is_preprint":false},{"pmid":"29406369","id":"PMC_29406369","title":"Silencing of Tctex1 impairs autophagy lysosomal degradation of α-synuclein and cell viability.","date":"2018","source":"Neuroreport","url":"https://pubmed.ncbi.nlm.nih.gov/29406369","citation_count":1,"is_preprint":false},{"pmid":"40457945","id":"PMC_40457945","title":"Generation and characterization of a DYNLT1-knockout mouse model reveals electrophysiological alterations and potential mechanistic contributors to atrial fibrillation.","date":"2025","source":"Biology open","url":"https://pubmed.ncbi.nlm.nih.gov/40457945","citation_count":1,"is_preprint":false},{"pmid":"20514145","id":"PMC_20514145","title":"Characterization of a Novel DNA Motif in the Tctex1 and TCP10 Gene Complexes and its Prevalence in the Mouse Genome.","date":"2007","source":"Advances in biological research","url":"https://pubmed.ncbi.nlm.nih.gov/20514145","citation_count":1,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.06.27.600786","title":"TCTEX1D2 has two distinct functions in sperm flagellum formation in mice; cytoplasmic dynein 2 and inner dynein arm","date":"2024-06-27","source":"bioRxiv","url":"https://doi.org/10.1101/2024.06.27.600786","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.07.14.664506","title":"Walking the Tightrope: Balancing Opposing Cooperativities as an Operating Principle in Dynein Assembly","date":"2025-07-18","source":"bioRxiv","url":"https://doi.org/10.1101/2025.07.14.664506","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":28539,"output_tokens":9537,"usd":0.114336,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":19746,"output_tokens":6672,"usd":0.132765,"stage2_stop_reason":"end_turn"},"total_usd":0.247101,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1996,\n      \"finding\": \"DYNLT1 (Tctex-1) is a stoichiometric 14-kDa light chain component of mammalian brain cytoplasmic dynein, co-sedimenting with microtubules, eluting with ATP (but not GTP), and immunoprecipitated by anti-dynein intermediate chain antibody.\",\n      \"method\": \"Peptide sequencing, sucrose density gradient sedimentation, ATP/GTP elution assays, immunoprecipitation with anti-intermediate chain monoclonal antibody\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — multiple orthogonal biochemical methods (peptide sequencing, sedimentation, immunoprecipitation) establishing stoichiometric dynein association\",\n      \"pmids\": [\"8943288\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Tctex-1 is present not only in cytoplasmic dynein but also in Chlamydomonas flagellar inner dynein arm I1 and in mouse sperm, supporting a role in flagellar dynein function relevant to meiotic drive.\",\n      \"method\": \"Genetic and biochemical dissection of Chlamydomonas flagellar axoneme, immunoblotting of fractionated dynein complexes\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic (Chlamydomonas mutants) plus biochemical fractionation identifying Tctex1 in inner arm I1, replicated across organisms\",\n      \"pmids\": [\"9490726\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"Tctex-1 binds directly to the C-terminal cytoplasmic tail of rhodopsin, mediating dynein-dependent transport of rhodopsin-bearing vesicles along microtubules; retinitis pigmentosa-causing C-terminal rhodopsin mutations disrupt this interaction.\",\n      \"method\": \"In vitro pull-down assays, yeast two-hybrid, microtubule translocation assay, site-directed mutagenesis of rhodopsin C-terminus\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — multiple orthogonal methods (pull-down, yeast two-hybrid, functional transport assay, mutagenesis) in a single rigorous study\",\n      \"pmids\": [\"10399916\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Tctex-1 specifically interacts with the Src-family kinase p59fyn via the first 19 amino acids of Fyn (requiring two lysine residues), and co-localizes with Fyn at the cleavage furrow and mitotic spindles during cytokinesis in T cell hybridomas.\",\n      \"method\": \"Yeast two-hybrid cloning, GST pull-down from cell lysates, immunofluorescence confocal microscopy\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — yeast two-hybrid confirmed by GST pull-down and co-localization, single lab\",\n      \"pmids\": [\"9712037\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Tctex-1 interacts with Doc2α and Doc2β in cell-free and intact cell systems; overexpression of the Doc2 Tctex-1-binding domain alters intracellular localization of mannose 6-phosphate receptor and cathepsin D, implicating Tctex-1 in dynein-dependent vesicle transport from trans-Golgi network to late endosomes.\",\n      \"method\": \"Co-immunoprecipitation, GST pull-down, overexpression with subcellular localization of cargoes by immunofluorescence\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — reciprocal binding confirmed by multiple assays, dominant-negative approach links interaction to vesicle trafficking phenotype\",\n      \"pmids\": [\"9804756\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Tctex-1 forms a homodimer in solution and binds directly to a 19-residue fragment of the dynein intermediate chain (DIC) immediately following the second alternative splicing site; the DIC-binding peptide contains an R/K-R/K-X-X-R/K consensus motif shared by diverse Tctex-1 cargo proteins.\",\n      \"method\": \"NMR spectroscopy (backbone secondary structure, chemical shift titration), gel filtration, peptide titration assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structure determination plus peptide titration mapping the DIC binding site, single lab with multiple orthogonal NMR methods\",\n      \"pmids\": [\"11148215\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"The cytoplasmic domain of poliovirus receptor CD155 associates with Tctex-1 via a SKCSR motif in the juxtamembrane region, confirmed biochemically and by co-immunoprecipitation, suggesting Tctex-1 links CD155-containing endocytic vesicles to the dynein motor for retrograde neuronal transport.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, domain mapping by deletion/site-directed mutagenesis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — yeast two-hybrid confirmed by co-IP and motif mapping, single lab\",\n      \"pmids\": [\"11751937\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Tctex-1/Tctex2 family light chains exist as dimers (Tctex1) or monomers (Tctex2) in solution; Chlamydomonas Tctex1 dimerizes in vivo as shown by yeast two-hybrid; cross-linking of outer arm dynein reveals interaction of Tctex2 (LC2) with LC6.\",\n      \"method\": \"Gel filtration, native gel electrophoresis, yeast two-hybrid, chemical cross-linking with dimethylpimelimidate, immunoblotting\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple biochemical methods confirming dimer state and inter-subunit contacts, single lab\",\n      \"pmids\": [\"11278908\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"DYNLT1 (Tctex-1) interacts with VDAC1 in vivo and in vitro; this interaction alters the electrophysiological properties of VDAC1 in planar lipid bilayer experiments (rTctex-1 slightly increases voltage-dependence of hVDAC1); the two proteins co-localize in HeLa cells.\",\n      \"method\": \"Sos-recruitment yeast two-hybrid, overlay assay with recombinant proteins, indirect immunofluorescence, EGFP fusion co-localization, planar lipid bilayer electrophysiology\",\n      \"journal\": \"The international journal of biochemistry & cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — interaction confirmed by overlay assay and functional electrophysiology readout, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"12009301\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Tctex-1 interacts with the cytoplasmic tail of BMPR-II in an isoform-specific manner and is phosphorylated by BMPR-II; primary pulmonary hypertension-causing mutations in exon 12 of BMPR2 disrupt this phosphorylation.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, in vitro kinase assay, site-directed mutagenesis of BMPR-II, co-localization by immunofluorescence\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — kinase assay plus co-IP and mutagenesis, single lab\",\n      \"pmids\": [\"14583445\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Tctex-1 interacts directly with the COOH-terminal tail of the PTH/PTH-related protein receptor (PTHR); a bipartite 34-amino-acid binding motif in PTHR is required, and a GFP-fused PTHR mutant impaired in Tctex-1 binding shows decreased internalization rate in response to PTH in MDCK cells.\",\n      \"method\": \"Yeast two-hybrid, in vitro binding assay, site-directed mutagenesis of PTHR, internalization assay by live imaging in MDCK cells\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — interaction mapped by mutagenesis in vitro; functional internalization linked to Tctex-1 binding, single lab\",\n      \"pmids\": [\"14575690\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"HSV-1 outer capsid protein VP26 binds dynein light chains Tctex-1 and RP3; VP26+ capsids microinjected into cells co-localize with Tctex-1 and microtubules and move toward the nucleus, whereas VP26− capsids do not, demonstrating VP26-mediated retrograde dynein-dependent transport.\",\n      \"method\": \"Yeast two-hybrid, in vitro pull-down, microinjection of recombinant capsids into live cells, fluorescence microscopy\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid confirmed by pull-down; functional transport demonstrated by microinjection assay with isogenic VP26+/- capsids\",\n      \"pmids\": [\"15117959\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"NMR solution structure of the Chlamydomonas Tctex1 dimer reveals a strand-switched beta-sheet interface similar to LC8; structural analysis identifies the dynein intermediate chain binding site and predicts a mechanism for cargo attachment distinct from but convergent with LC8.\",\n      \"method\": \"NMR solution structure determination, structural comparison with LC8\",\n      \"journal\": \"Structure\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structure with functional site identification, single lab but high-resolution structural method\",\n      \"pmids\": [\"15698565\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Crystal structure of Drosophila TcTex-1 at 1.7 Å reveals a homodimeric domain-swapped fold nearly identical to LC8 despite no sequence homology; the N-terminus binds a crystallographic dimer as an antiparallel beta-strand at the same position as nNOS in LC8, suggesting TcTex-1 binds targets similarly to LC8.\",\n      \"method\": \"X-ray crystallography (MAD phasing, 1.7 Å), structural comparison with LC8-nNOS complex\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — high-resolution crystal structure with mechanistic interpretation of cargo-binding mode, single lab\",\n      \"pmids\": [\"15701632\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Tctex-1 interacts directly and selectively with N- and P/Q-type (but not L-type) voltage-gated Ca2+ channels; overexpression of the channel fragment containing the Tctex-1 binding domain in hippocampal neurons decreases surface expression of N- and P/Q-type channels and reduces Ca2+ current density.\",\n      \"method\": \"Co-immunoprecipitation, overexpression with immunostaining for surface channel levels, electrophysiology (Ca2+ current density measurement) in hippocampal neurons\",\n      \"journal\": \"Nature neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — binding confirmed by co-IP; functional effect on trafficking and currents demonstrated in neurons, single lab\",\n      \"pmids\": [\"15768038\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"Phosphorylation of Tctex-1 at Ser82 (mimicked by S82E mutant) reduces its affinity for dynein intermediate chain without affecting rhodopsin binding, preventing incorporation into the dynein complex; S82E dominant-negative and S82A (dephospho-mimic) both cause mislocalization of rhodopsin in polarized MDCK cells, indicating that a phosphorylation-dependent assembly/disassembly cycle of Tctex-1 from dynein is required for apical cargo delivery.\",\n      \"method\": \"Velocity sedimentation, co-immunoprecipitation, phosphomimetic mutagenesis (S82E, S82A), immunofluorescence in polarized MDCK cells\",\n      \"journal\": \"Traffic\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — phosphomimetic mutagenesis combined with sedimentation and functional localization assay, multiple orthogonal methods in single lab\",\n      \"pmids\": [\"16956385\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"Tctex-1 dimerization is obligatorily coupled to folding; unfolding follows a two-state mechanism (folded dimer → 2 unfolded monomers) with no stable monomeric intermediate, distinguishing it mechanistically from LC8 which shows a three-state mechanism.\",\n      \"method\": \"Equilibrium unfolding monitored by intrinsic fluorescence intensity, fluorescence anisotropy, circular dichroism; sedimentation equilibrium; chemical cross-linking\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — multiple biophysical methods for thermodynamic characterization, single lab\",\n      \"pmids\": [\"16734416\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Gβγ binds Tctex-1 and competes with dynein intermediate chain for binding, segregating a dynein-free pool of Tctex-1; this Gβγ-Tctex-1 complex is endogenous in embryonic mouse brain and promotes neurite outgrowth independently of dynein.\",\n      \"method\": \"Co-immunoprecipitation from embryonic brain extracts, sucrose gradient fractionation, overexpression/dominant-negative studies in primary hippocampal neurons, neurite outgrowth assay\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — endogenous complex confirmed by co-IP from brain; competition mechanism and dynein-free fractionation; functional neurite outgrowth assay — multiple orthogonal methods\",\n      \"pmids\": [\"17491591\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Tctex-1 mediates intracellular targeting of Mason-Pfizer monkey virus (M-PMV) matrix protein to a cytoplasmic assembly site; a single amino acid mutation (R55F) in MA buries the putative Tctex-1 binding motif, redirecting viral assembly from cytoplasm to plasma membrane.\",\n      \"method\": \"In vitro biochemical binding assays, NMR structure comparison of wt and R55F MA, mutagenesis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — structural and biochemical evidence linking conformational change in MA to Tctex-1 accessibility and assembly site targeting, single lab\",\n      \"pmids\": [\"18647839\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Tctex-1 (Dynlt1) acts as a negative regulator of Lfc (Arhgef2, a RhoGEF) in cortical neural precursors; Dynlt1 knockdown promotes neurogenesis and depletes cycling radial precursors, while Arhgef2 knockdown inhibits neurogenesis; double knockdown epistasis shows Tctex-1 antagonizes Lfc's proneurogenic actions and the two proteins regulate mitotic spindle orientation.\",\n      \"method\": \"shRNA knockdown in cortical precursors in culture and in utero electroporation, BrdU/EdU labeling, spindle orientation measurement, genetic epistasis (double knockdown)\",\n      \"journal\": \"Nature neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic epistasis in vivo plus multiple cellular assays establishing pathway position, replicated in vitro and in vivo\",\n      \"pmids\": [\"19448628\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Tctex-1 co-localizes and physically interacts with Lfc in neurons, inhibiting Lfc's GEF activity, decreasing Rho-GTP levels, and antagonizing Lfc-mediated inhibition of axon formation; this places Tctex-1 upstream of RhoA in neuronal polarization.\",\n      \"method\": \"Co-immunoprecipitation, RhoA activity assay (GTP-Rho pull-down), fluorescence co-localization, genetic knockdown, axon formation assay\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct interaction confirmed, GEF activity assay performed, pathway placement by knockdown, single lab\",\n      \"pmids\": [\"20463241\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Phospho-Thr94 Tctex-1 is recruited to ciliary transition zones prior to S-phase entry and drives both ciliary disassembly and cell cycle progression; phosphomimetic T94E accelerates cilium disassembly and S-phase entry; this function requires actin dynamics and is dispensable in non-ciliated cells.\",\n      \"method\": \"Phospho-specific antibody, phosphomimetic (T94E) and phospho-dead (T94A) mutant expression, siRNA knockdown, S-phase entry assay (BrdU), cilia length measurement, actin perturbation experiments, in vivo cortical neural progenitor analysis\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (phospho-specific detection, phosphomimetics, siRNA, in vivo cortical studies), replicated in multiple cell types\",\n      \"pmids\": [\"21394082\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Tctex-1 interacts with Rab3D in a GTP-dependent manner, co-occupies Rab3D vesicles in osteoclasts, associates with dynein and microtubules, and is required for bone resorption; Tctex-1 RNAi significantly impairs resorption capacity and mislocalizes Rab3D vesicles.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, GTP-dependence assay, immunofluorescence, siRNA knockdown, bone resorption pit assay\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — GTP-dependent binding confirmed by co-IP; functional knockdown with defined phenotype, single lab\",\n      \"pmids\": [\"21262767\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"DYNLT1 interacts with VDAC1, and DYNLT1 knockdown aggravates hypoxia-induced mitochondrial permeabilization; DYNLT1 co-immunoprecipitates with VDAC1 and is closely associated with microtubules and VDAC1 by immunofluorescence in cardiomyocytes.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, immunofluorescence, siRNA knockdown, mitochondrial membrane potential and ATP assays\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — interaction confirmed by co-IP; functional knockdown links DYNLT1 to mitochondrial permeability, single lab\",\n      \"pmids\": [\"22164227\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Phosphorylation of DYNLT1 at Ser82 (S82E phosphomimetic) in hypoxia aggravates mitochondrial permeability transition and increases free tubulin (destabilizing microtubules), while S82A (dephospho-mimic) diminishes hypoxia-induced injury, demonstrating a regulatory role for S82 phosphorylation in microtubule stability and mitochondrial protection.\",\n      \"method\": \"Recombinant adenovirus expression of S82E and S82A mutants, mitochondrial membrane potential assay, cytochrome c release, ATP quantification, free/polymerized tubulin fractionation\",\n      \"journal\": \"Molecules and cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — phosphomimetic mutagenesis with multiple functional readouts in two cell lines, single lab\",\n      \"pmids\": [\"24170091\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"DYNLT1 interacts with NUP98-HOXA9 (via the FG-repeat region) and with wild-type NUP98 and other FG-repeat nucleoporins; DYNLT1 knockdown reduces NUP98-HOXA9-dependent transcriptional activation and inhibits NUP98-HOXA9-induced proliferation of CD34+ hematopoietic cells; DYNLT1 localizes to the nuclear periphery co-localizing with nuclear pore complexes.\",\n      \"method\": \"Yeast two-hybrid, in vitro pull-down, co-immunoprecipitation, deletion mapping, RNAi knockdown, transcription reporter assay, hematopoietic cell proliferation assay, immunofluorescence\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — multiple binding assays confirmed; functional knockdown with two orthogonal phenotypic readouts, single lab\",\n      \"pmids\": [\"23840580\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"C. trachomatis inclusion membrane protein CT850 interacts with DYNLT1 via an R/K-R/K-X-X-R/K motif; CT850 localizes to the MTOC in a DYNLT1-binding-domain-dependent manner; DYNLT1 is enriched at CT850 foci on the inclusion membrane; depletion of DYNLT1 disrupts inclusion association with centrosomes.\",\n      \"method\": \"Yeast two-hybrid screen, co-localization by immunofluorescence, site-directed mutagenesis of CT850 binding motif, siRNA knockdown of DYNLT1\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — motif mutagenesis and knockdown link interaction to centrosomal positioning phenotype, single lab\",\n      \"pmids\": [\"25944661\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Tctex-1 associates with unattached kinetochores independently of dynein; Tctex-1 knockdown causes prolonged mitotic arrest and chromosome missegregation; kinetochore localization requires the Ndc80 complex but not the ZW10-dynein pathway; Tctex-1 knockdown does not affect dynein localization or function at the kinetochore.\",\n      \"method\": \"siRNA knockdown, immunofluorescence for kinetochore markers, time-lapse microscopy, chromosome segregation assay, epistasis with ZW10 and Ndc80 complex depletion\",\n      \"journal\": \"Cell cycle\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis placing Tctex-1 in Ndc80 but not ZW10 pathway; functional knockdown phenotype, single lab\",\n      \"pmids\": [\"25928583\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"DYNLT1 forms a tripartite complex with dynein intermediate chain and RagA; NMR spectroscopy distinguishes the DIC-binding residues on DYNLT1 from the RagA-binding residues; a β-strand within the RagA G3 box mediates association with DYNLT1.\",\n      \"method\": \"NMR spectroscopy (residue-level mapping of binding sites), yeast two-hybrid, pull-down assays\",\n      \"journal\": \"The FEBS journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — NMR mapping of distinct binding sites on DYNLT1 for two ligands, single lab\",\n      \"pmids\": [\"26227614\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"The hydrophobic groove of DYNLT1 accommodates dynein intermediate chain and diverse cargo peptides; pepscan mutagenesis defines the consensus recognition sequence for the canonical binding groove; NMR structure of human DYNLT1 in complex with dynein intermediate chain is determined; DYNLT1 functions as a molecular dimerization engine; evidence for a dual binding mode for Lfc and PTHR.\",\n      \"method\": \"Pepscan (positional scanning mutagenesis), NMR spectroscopy (solution structure of mammalian DYNLT1-DIC complex), biochemical binding assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR solution structure of mammalian complex plus systematic pepscan mutagenesis defining recognition specificity, single lab\",\n      \"pmids\": [\"27502274\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Desmoglein 1 (Dsg1) interacts with Tctex-1 and cortactin; Tctex-1 ensures correct membrane compartmentalization of Dsg1-containing desmosomes, enabling cortactin/Arp2/3-dependent perijunctional actin polymerization and decreased E-cadherin tension, thereby promoting keratinocyte delamination during epidermal stratification.\",\n      \"method\": \"Co-immunoprecipitation, RNAi knockdown, live imaging, FRAP, traction force microscopy, immunofluorescence, overexpression in simple epithelial cells\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (co-IP, knockdown, force microscopy, live imaging) linking Tctex-1 to Dsg1 compartmentalization and actin-dependent delamination\",\n      \"pmids\": [\"29535305\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Tctex-1 interacts with KIM-1 at baseline but dissociates within 90 min of efferocytosis initiation; this dissociation requires actin and microtubule polymerization; Tctex-1 knockdown inhibits efferocytosis comparably to KIM-1 knockdown; KIM-1 expression inhibits phosphorylation of Tctex-1 at T94, and the T94E phosphomimetic shows reduced binding to KIM-1.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, confocal imaging, shRNA knockdown, efferocytosis assay, pharmacological disruption of cytoskeleton\",\n      \"journal\": \"Journal of cellular physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — interaction with functional dissociation kinetics confirmed; knockdown phenotype established; T94 phospho-regulation of interaction demonstrated, single lab\",\n      \"pmids\": [\"29693725\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Exosomal miR-15b-3p targets DYNLT1 mRNA (confirmed by dual-luciferase reporter), suppressing DYNLT1 expression and downstream Caspase-9 and Caspase-3, thereby inhibiting apoptosis and promoting gastric cancer cell migration, invasion and proliferation in vitro and tumor growth in vivo.\",\n      \"method\": \"Dual-luciferase reporter assay, Western blotting, qRT-PCR, exosome transfer with PKH26/GFP-CD63 labeling, xenograft tumor models\",\n      \"journal\": \"Journal of experimental & clinical cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct 3'UTR targeting validated by luciferase assay; pathway placement through Caspase-3/9 measurement upon DYNLT1 knockdown, single lab\",\n      \"pmids\": [\"32039741\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Tctex-1 augments PTHR-mediated Gs/adenylyl cyclase signaling by directly binding adenylyl cyclase type 6 (AC6) and activating AC independently of its binding to PTHR.\",\n      \"method\": \"Co-immunoprecipitation (Tctex-1 with AC6), cAMP assay in cells expressing Tctex-1 with/without PTHR, dominant-negative and overexpression approaches\",\n      \"journal\": \"Journal of pharmacological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — direct binding to AC6 confirmed by co-IP; functional cAMP elevation assay; single lab\",\n      \"pmids\": [\"33357773\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"DYNLT1 co-localizes with VDAC1 on mitochondria and stabilizes VDAC1 by inhibiting E3 ligase Parkin-mediated ubiquitination and degradation of VDAC1, thereby promoting mitochondrial metabolism (membrane potential, ATP production) and breast cancer cell proliferation/invasion in vitro and tumor development in vivo.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay, mitochondrial membrane potential measurement, ATP quantification, in vivo xenograft, shRNA knockdown and overexpression\",\n      \"journal\": \"Molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ubiquitination assay and co-IP establish mechanism; in vivo validation, single lab\",\n      \"pmids\": [\"37280526\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"MAST4 kinase localizes to the primary cilium, binds the kinase domain of Tctex-1, and phosphorylates Tctex-1 at Thr94; MAST4 suppression blocks serum-induced ciliary resorption and phospho-(T94)Tctex-1 recruitment to the ciliary base; MAST4 is required for Cdc42 activation and Rab5-mediated periciliary membrane endocytosis during ciliary resorption.\",\n      \"method\": \"siRNA/shRNA knockdown, overexpression of catalytic-dead MAST4 mutants, phospho-specific immunofluorescence, co-immunoprecipitation (Tctex-1 with MAST4 kinase domain), Cdc42 activation assay, Rab5 endocytosis assay\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — kinase-dead mutagenesis plus co-IP plus multiple downstream functional assays (cilia, Cdc42, endocytosis) identifying MAST4 as the Thr94 kinase, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"37726137\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"DYNLT1 knockout in mice (CRISPR/Cas9) induces spontaneous atrial fibrillation associated with reduced TMCO1 distribution in the ER of atrial cardiomyocytes, leading to ER calcium overload; DYNLT1 deletion also causes downregulation of gap junction proteins and increased cardiomyocyte apoptosis.\",\n      \"method\": \"CRISPR/Cas9 knockout mice, electrocardiography, echocardiography, histology, mass spectrometry, immunofluorescence for TMCO1 and gap junction proteins\",\n      \"journal\": \"Biology open\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO model with mechanistic follow-up identifying TMCO1 mislocalization and ER calcium overload, single lab\",\n      \"pmids\": [\"40457945\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Quantitative ITC combined with Bayesian inference of a seven-state binding model reveals that Tctex-1 and LC8 display opposing cooperativities (positive and negative) in assembling with the dynein intermediate chain, and identifies previously inaccessible half-bound states that may regulate dynein cargo attachment and release.\",\n      \"method\": \"Isothermal titration calorimetry (39 experiments), hierarchical Bayesian inference, global thermodynamic modeling of IC/LC8/Tctex-1 assembly\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — rigorous quantitative thermodynamic analysis with multiple ITC datasets; preprint, not yet peer-reviewed\",\n      \"pmids\": [\"bio_10.1101_2025.07.14.664506\"],\n      \"is_preprint\": true\n    }\n  ],\n  \"current_model\": \"DYNLT1 (Tctex-1) is a homodimeric 14-kDa dynein light chain that assembles into the cytoplasmic dynein complex by binding a conserved R/K-R/K-X-X-R/K motif on the dynein intermediate chain; it serves as a direct cargo adaptor linking diverse membrane receptors (rhodopsin, CD155, PTHR, BMPR-II, N/P/Q-type Ca2+ channels), viral proteins (HSV VP26, flavivirus M, M-PMV MA), and signalling molecules (Doc2, Rab3D, RagA, Lfc, VDAC1) to the dynein motor for minus-end-directed transport, while a phosphorylation-regulated dissociation cycle (Ser82 phosphorylation releases it from dynein; MAST4-mediated Thr94 phosphorylation recruits it to the ciliary transition zone) controls cargo delivery and ciliary resorption, and a dynein-free pool complexed with Gβγ independently regulates actin/microtubule dynamics to drive neurite outgrowth, neurogenesis, spindle orientation, kinetochore-microtubule attachment, and—through VDAC1 stabilization against Parkin-mediated ubiquitination—mitochondrial metabolism.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"DYNLT1 (Tctex-1) is a homodimeric 14-kDa light chain of mammalian cytoplasmic dynein that functions as a cargo adaptor coupling membrane receptors and signalling proteins to the minus-end-directed microtubule motor [#0, #2]. It is a stoichiometric, ATP-elutable component of brain cytoplasmic dynein and also assembles into flagellar inner-arm dynein [#0, #1]. Structurally, Tctex-1 adopts a domain-swapped, dimeric fold convergent with LC8 despite lacking sequence homology, and binds a 19-residue segment of the dynein intermediate chain (DIC) bearing an R/K-R/K-X-X-R/K consensus that is shared by its cargoes [#5, #13, #29]. Through this hydrophobic groove it directly engages a broad set of cargoes—rhodopsin, the poliovirus receptor CD155, PTH/PTHrP receptor, BMPR-II, N- and P/Q-type Ca2+ channels, Doc2, Rab3D, and the small GTPase RagA—linking these receptors and vesicles to dynein for retrograde and polarized transport [#2, #6, #9, #10, #14, #22, #28]. Cargo loading is gated by phosphorylation: Ser82 phosphorylation lowers DIC affinity and ejects Tctex-1 from the motor, and a phospho-cycle is required for correct apical delivery of rhodopsin [#15]. Independently of dynein, a Gβγ-bound pool drives neurite outgrowth, and Tctex-1 antagonizes the RhoGEF Lfc to control RhoA signalling, neurogenesis, and mitotic spindle orientation [#17, #19, #20]. MAST4-mediated Thr94 phosphorylation recruits Tctex-1 to the ciliary transition zone to drive ciliary resorption and S-phase entry via actin dynamics and Cdc42/Rab5-dependent endocytosis [#21, #35]. Tctex-1 also localizes to unattached kinetochores via the Ndc80 complex to ensure faithful chromosome segregation, and stabilizes mitochondrial VDAC1 against Parkin-mediated ubiquitination to support mitochondrial metabolism [#27, #34]. Disease-linked roles include disruption of the rhodopsin interaction by retinitis pigmentosa mutations and of BMPR-II phosphorylation by primary pulmonary hypertension mutations [#2, #9].\",\n  \"teleology\": [\n    {\n      \"year\": 1996,\n      \"claim\": \"Established that Tctex-1 is a genuine, stoichiometric subunit of cytoplasmic dynein rather than a loosely associated factor, defining it as part of the motor itself.\",\n      \"evidence\": \"Peptide sequencing, sucrose gradient sedimentation, ATP/GTP elution, and anti-DIC immunoprecipitation of brain dynein\",\n      \"pmids\": [\"8943288\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not map the DIC contact site\", \"Cargo specificity unaddressed\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Showed the same light chain operates in both cytoplasmic and flagellar dynein across organisms, broadening its motor association beyond mammalian cytoplasm.\",\n      \"evidence\": \"Genetic/biochemical dissection of Chlamydomonas axonemal dynein and immunoblotting of sperm fractions\",\n      \"pmids\": [\"9490726\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional contribution to flagellar motility not isolated\", \"Relation to meiotic drive remained correlative\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Provided the first direct cargo: Tctex-1 binds the rhodopsin C-terminal tail and links rhodopsin vesicles to dynein, establishing it as a receptor-to-motor adaptor and connecting it to retinitis pigmentosa.\",\n      \"evidence\": \"Yeast two-hybrid, pull-down, microtubule translocation assay, and rhodopsin C-terminus mutagenesis\",\n      \"pmids\": [\"10399916\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo transport requirement in photoreceptors not tested\", \"Whether binding is direct to dynein-incorporated Tctex-1 vs free pool unresolved\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Defined the molecular logic of cargo recognition by mapping the homodimeric Tctex-1 to a 19-residue DIC peptide containing an R/K-R/K-X-X-R/K motif shared with cargoes.\",\n      \"evidence\": \"NMR chemical-shift titration, gel filtration, and peptide titration\",\n      \"pmids\": [\"11148215\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How cargo and DIC binding are coordinated not addressed\", \"No high-resolution complex structure yet\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Expanded the cargo repertoire to additional membrane receptors, supporting a general adaptor role rather than a rhodopsin-specific one.\",\n      \"evidence\": \"Yeast two-hybrid and co-IP mapping of CD155 SKCSR juxtamembrane motif\",\n      \"pmids\": [\"11751937\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Retrograde neuronal transport of CD155 not directly demonstrated\", \"Single lab\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Resolved the Tctex-1 fold at high resolution, revealing convergent evolution with LC8 and a shared cargo-binding mode despite no sequence homology.\",\n      \"evidence\": \"NMR solution structure (Chlamydomonas) and 1.7 Å crystal structure (Drosophila) with comparison to LC8-nNOS\",\n      \"pmids\": [\"15698565\", \"15701632\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mammalian DIC-bound structure not yet solved\", \"Functional consequence of fold for specificity inferred, not tested\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Identified Ser82 phosphorylation as a switch that ejects Tctex-1 from dynein without disturbing cargo binding, establishing a phospho-gated assembly/disassembly cycle needed for cargo delivery.\",\n      \"evidence\": \"Phosphomimetic S82E/S82A mutagenesis, velocity sedimentation, co-IP, and rhodopsin localization in polarized MDCK cells\",\n      \"pmids\": [\"16956385\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Kinase responsible for Ser82 not identified\", \"Spatiotemporal regulation of the cycle unknown\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Revealed a dynein-independent function: Gβγ competes with DIC to capture a free Tctex-1 pool that drives neurite outgrowth, separating motor adaptor and signalling roles.\",\n      \"evidence\": \"Co-IP from embryonic brain, sucrose gradient fractionation, and neurite outgrowth assays in hippocampal neurons\",\n      \"pmids\": [\"17491591\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream effectors of the Gβγ-Tctex-1 complex incomplete\", \"How the two pools are partitioned in vivo unclear\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Placed Tctex-1 in a neurogenic signalling pathway as a negative regulator of the RhoGEF Lfc, controlling spindle orientation and the balance between precursor cycling and neurogenesis.\",\n      \"evidence\": \"shRNA knockdown in vitro and by in utero electroporation, BrdU/EdU labeling, spindle measurement, and double-knockdown epistasis\",\n      \"pmids\": [\"19448628\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether this role requires dynein or the free pool unresolved at this stage\", \"Direct biochemical Lfc interaction shown later\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Mechanistically grounded the Lfc antagonism by showing Tctex-1 directly binds Lfc, inhibits its GEF activity, and lowers RhoA-GTP to promote axon formation.\",\n      \"evidence\": \"Co-IP, RhoA GTP pull-down activity assay, co-localization, and axon formation assays in neurons\",\n      \"pmids\": [\"20463241\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural basis of Lfc inhibition unknown\", \"Single lab\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Identified a second regulatory phosphosite, Thr94, whose modification recruits Tctex-1 to the ciliary transition zone to couple ciliary disassembly with cell-cycle progression via actin dynamics.\",\n      \"evidence\": \"Phospho-specific antibody, T94E/T94A mutants, siRNA, S-phase and cilia-length assays, and in vivo cortical progenitor analysis\",\n      \"pmids\": [\"21394082\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Thr94 kinase unidentified at this stage\", \"Mechanistic link to actin not fully defined\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Extended adaptor function to GTP-dependent vesicular cargo by linking Rab3D-bearing vesicles to dynein, required for osteoclast bone resorption.\",\n      \"evidence\": \"Yeast two-hybrid, GTP-dependent co-IP, immunofluorescence, siRNA, and bone resorption pit assay\",\n      \"pmids\": [\"21262767\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct transport of Rab3D vesicles by dynein not visualized in real time\", \"Single lab\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Connected Tctex-1 to mitochondrial regulation and microtubule stability, with Ser82 phosphorylation aggravating hypoxic permeability transition through increased free tubulin.\",\n      \"evidence\": \"VDAC1 co-IP, S82E/S82A adenoviral expression, mitochondrial potential/ATP/cytochrome c assays, tubulin fractionation in cardiomyocytes\",\n      \"pmids\": [\"12009301\", \"22164227\", \"24170091\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether VDAC1 effect is dynein-dependent unclear\", \"Mechanism linking S82 to tubulin not defined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Revealed a nuclear-periphery role: Tctex-1 binds FG-repeat nucleoporins and NUP98-HOXA9 to support oncogenic transcription and hematopoietic proliferation.\",\n      \"evidence\": \"Yeast two-hybrid, pull-down, co-IP, deletion mapping, RNAi, reporter and proliferation assays, immunofluorescence\",\n      \"pmids\": [\"23840580\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether this is dynein-dependent unknown\", \"Physiological relevance beyond leukemic context untested\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Demonstrated dynein-independent kinetochore function: Tctex-1 localizes to unattached kinetochores via the Ndc80 complex (not the ZW10-dynein pathway) and is needed for accurate chromosome segregation.\",\n      \"evidence\": \"siRNA, kinetochore-marker immunofluorescence, time-lapse, segregation assays, epistasis with ZW10 and Ndc80 depletion\",\n      \"pmids\": [\"25928583\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular role at the kinetochore unresolved\", \"Single lab\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Showed Tctex-1 can simultaneously engage DIC and a second ligand (RagA) at distinct surfaces, supporting a tripartite cargo-loading architecture and pathogen hijacking via the same recognition motif.\",\n      \"evidence\": \"NMR residue-level mapping of separate DIC and RagA sites; yeast two-hybrid and motif mutagenesis of Chlamydia CT850\",\n      \"pmids\": [\"26227614\", \"25944661\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional output of RagA-Tctex-1-dynein complex unclear\", \"In vivo simultaneous occupancy not shown\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Defined the recognition code of the canonical binding groove and solved the mammalian DYNLT1-DIC complex, formalizing Tctex-1 as a dimerization engine with a dual cargo-binding mode.\",\n      \"evidence\": \"Pepscan positional mutagenesis and NMR solution structure of the human DYNLT1-DIC complex\",\n      \"pmids\": [\"27502274\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How phosphorylation alters groove engagement structurally not resolved\", \"Single lab\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Linked Tctex-1 to actin-based epithelial morphogenesis by controlling desmosomal Dsg1 compartmentalization and perijunctional actin polymerization during keratinocyte delamination.\",\n      \"evidence\": \"Co-IP, RNAi, FRAP, traction force microscopy, and live imaging\",\n      \"pmids\": [\"29535305\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether dynein is required not established\", \"Connection to the Gβγ/cytoskeletal pool not tested\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Showed Thr94 phosphorylation gates a receptor interaction (KIM-1) whose actin/microtubule-dependent dissociation drives efferocytosis, generalizing phospho-regulated cargo release.\",\n      \"evidence\": \"Yeast two-hybrid, co-IP dissociation kinetics, shRNA, efferocytosis assays, T94E mutant binding\",\n      \"pmids\": [\"29693725\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Kinase/phosphatase controlling T94 in this context not defined\", \"Single lab\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified MAST4 as the Thr94 kinase, completing the upstream regulation of ciliary resorption through Cdc42 activation and Rab5-mediated periciliary endocytosis.\",\n      \"evidence\": \"Kinase-dead MAST4 mutants, co-IP with the kinase domain, phospho-specific immunofluorescence, Cdc42 and Rab5 functional assays\",\n      \"pmids\": [\"37726137\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Upstream signals activating MAST4 unclear\", \"Ser82 kinase still unidentified\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Provided a mechanism for the mitochondrial role by showing DYNLT1 stabilizes VDAC1 by blocking Parkin-mediated ubiquitination, promoting metabolism and tumor growth.\",\n      \"evidence\": \"Co-IP, ubiquitination assay, mitochondrial potential/ATP measurement, shRNA/overexpression, and xenografts\",\n      \"pmids\": [\"37280526\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How DYNLT1 binding occludes Parkin not structurally defined\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Provided in vivo loss-of-function evidence: DYNLT1 knockout mice develop atrial fibrillation via TMCO1 mislocalization and ER calcium overload, tying the protein to cardiac homeostasis.\",\n      \"evidence\": \"CRISPR/Cas9 knockout mice, ECG/echocardiography, mass spectrometry, and TMCO1/gap-junction immunofluorescence\",\n      \"pmids\": [\"40457945\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether TMCO1 mislocalization is a direct dynein-transport defect untested\", \"Single lab\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the two regulatory phosphosites, distinct cargo classes, and the dynein-bound versus free pools are coordinately switched in a single cell to dictate cargo loading versus signalling remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified structural model of phospho-gated DIC versus cargo occupancy\", \"Ser82 kinase unidentified\", \"Quantitative rules partitioning dynein-bound and Gβγ-bound pools in vivo unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [2, 5, 29]},\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [0, 24, 30]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [20, 33, 34]},\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [0, 5, 13]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [0, 23]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [21, 35]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [8, 23, 34]},\n      {\"term_id\": \"GO:0005635\", \"supporting_discovery_ids\": [25]},\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [26]},\n      {\"term_id\": \"GO:0005694\", \"supporting_discovery_ids\": [27]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [2, 4, 15]},\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [4, 11, 22]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [17, 20, 33]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [21, 27]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [19, 30]}\n    ],\n    \"complexes\": [\n      \"cytoplasmic dynein complex\",\n      \"flagellar inner-arm dynein I1\"\n    ],\n    \"partners\": [\n      \"DYNC1I (dynein intermediate chain)\",\n      \"RHO (rhodopsin)\",\n      \"BMPR2\",\n      \"RagA\",\n      \"Lfc/ARHGEF2\",\n      \"VDAC1\",\n      \"GNB/GNG (Gβγ)\",\n      \"MAST4\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":9,"faith_total":9,"faith_pct":100.0}}