{"gene":"DCTN1","run_date":"2026-06-09T23:54:41","timeline":{"discoveries":[{"year":2021,"finding":"DCTN1 binds directly to TDP-43; biochemical truncation analysis showed that the CAP-Gly-basic supradomain, dynactin domain, and C-terminal region of DCTN1 each interact with TDP-43 preferentially through TDP-43's C-terminal region. The Perry disease mutation p.G71A impairs this TDP-43-binding ability. Overexpression of DCTN1-G71A, the dynactin-domain fragment, or C-terminal fragment induced cytoplasmic mislocalization and aggregation of TDP-43, identifying DCTN1 as a regulator of TDP-43 nucleocytoplasmic transport.","method":"Co-immunoprecipitation, truncation mutant pulldown panel, overexpression with immunocytochemistry","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal binding mapped with truncation panel and mutant, single lab, multiple orthogonal methods (Co-IP + ICC)","pmids":["33924373"],"is_preprint":false},{"year":2024,"finding":"DCTN1 deficiency perturbs stress granule dynamics (delays their disassembly after stress) and thereby drives TDP-43 cytoplasmic aggregation in cultured cells; genetic knockdown of DCTN1 in a Drosophila ALS/FTD model accelerates ubiquitin-positive TDP-43 cytoplasmic inclusions and neurodegeneration. Knockdown of other microtubule-associated motor complexes (dynein, kinesin) similarly increased TDP-43 inclusions, placing intracellular transport along microtubules as a key upstream requirement.","method":"siRNA knockdown in cultured cells (stress granule disassembly assay), Drosophila genetic knockdown with immunohistochemistry for TDP-43 inclusions","journal":"Acta neuropathologica communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo genetic knockdown with defined phenotypic readout plus cell-based mechanistic assay, single lab","pmids":["38311779"],"is_preprint":false},{"year":2020,"finding":"DCTN1 functions upstream of Cdc42/PAK2 signaling during RANKL-induced osteoclastogenesis: DCTN1 knockdown suppressed RANKL-induced Cdc42 activation, osteoclast formation, bone resorption, and induction of NFATc1/c-Fos; constitutively active Cdc42 rescued osteoclast differentiation in DCTN1-depleted precursors. PAK2 was identified as functioning downstream of Cdc42 in this axis. DCTN1 also inhibited caspase-3 activation/apoptosis during differentiation.","method":"siRNA knockdown, constitutively active Cdc42 rescue, Cdc42 activity assay, caspase-3 assay, in vivo bone erosion model","journal":"Experimental & molecular medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — epistasis established by knockdown + rescue with activated Cdc42, multiple orthogonal assays, confirmed in animal model","pmids":["32210358"],"is_preprint":false},{"year":2019,"finding":"Wild-type DCTN1 is primarily degraded by the ubiquitin-proteasome system under normal conditions; autophagy is not the primary degradation route for either wild-type or G59S mutant DCTN1 under basal conditions. However, when proteasome activity is inhibited, autophagy acts as a backup clearance pathway for G59S DCTN1 aggregates. Overexpression of the autophagy master regulator TFEB promotes autophagic clearance of G59S aggregates and reduces cytotoxicity when proteasomes are impaired.","method":"Proteasome inhibitor treatment, autophagy inhibition, TFEB overexpression, cell viability assays in cultured cell model","journal":"Neurotoxicity research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological dissection of degradation pathways with multiple inhibitors and genetic rescue, single lab","pmids":["31654383"],"is_preprint":false},{"year":2024,"finding":"Wild-type p150Glued (DCTN1) co-overexpression suppresses aggregate formation by Perry disease-linked mutant p150Glued in HEK293T cells, indicating a dominant-negative or sequestration mechanism; this rescue was less effective for motor neuron disease-linked mutants. Perry disease mutations (but not control-associated variants) in the CAP-Gly domain caused cytoplasmic aggregation distinct from the thread-like distribution of wild-type or ALS-associated variants.","method":"Overexpression of wild-type and mutant DCTN1 constructs in HEK293T cells with immunofluorescence distribution analysis","journal":"Biological & pharmaceutical bulletin","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single method (ICC in overexpression system), no biochemical validation of mechanism","pmids":["38267040"],"is_preprint":false},{"year":2010,"finding":"In C. elegans neurons, DNC-1 (the DCTN1/p150Glued ortholog) acts as an adaptor for kinesin-3 UNC-104(KIF1A): bimolecular fluorescence complementation (BiFC) showed that the UNC-104/DNC-1 complex localizes predominantly to axonal termini, in contrast to UNC-104/UNC-16 (soma) or UNC-104/SYD-2 (along axons), indicating that the DNC-1 adaptor directs the motor to axon terminals.","method":"Bimolecular fluorescence complementation (BiFC) in live C. elegans neurons","journal":"Neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct visualization of motor-adaptor complex in live neurons with defined subcellular localization outcome; single lab","pmids":["21195138"],"is_preprint":false},{"year":2011,"finding":"Dctn1 is localized to the sperm tail in mouse; in vivo siRNA-mediated knockdown of Dctn1 in mouse seminiferous tubules significantly increased sperm tail morphological abnormalities (~24% vs ~12% in controls), demonstrating a required role for DCTN1 in spermiogenesis/sperm tail formation.","method":"Western blot, indirect immunofluorescence for localization; in vivo siRNA microinjection into seminiferous tubules with sperm morphology analysis","journal":"Zhonghua nan ke xue (National journal of andrology)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct localization plus loss-of-function with quantitative phenotypic readout in vivo, single lab","pmids":["21961240"],"is_preprint":false},{"year":2023,"finding":"Neuron-specific or muscle-specific knockdown of Dctn1 (Drosophila ortholog of DCTN1) each independently caused climbing and flight defects in adult flies; global Dctn1 reduction caused larval mobility reduction and neuromuscular junction deficits prior to pupal lethality. RNA-seq revealed splicing alterations in genes required for synapse organisation, indicating that loss of DCTN1 disrupts synaptic gene expression downstream.","method":"Tissue-specific RNAi knockdown in Drosophila, behavioral assays, NMJ morphology, RNA-seq transcriptome profiling","journal":"Frontiers in neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic loss-of-function with multiple phenotypic readouts and transcriptomic follow-up, single lab","pmids":["37360176"],"is_preprint":false},{"year":2014,"finding":"The DCTN1 p.F52L mutation impairs microtubule binding of p150Glued in vitro (compared to wild-type), and the DCTN1 p.K56R mutation reduces affinity for microtubules and causes a more diffuse cytoplasmic distribution in HEK293 cells compared to wild-type p150Glued.","method":"In vitro microtubule-binding assay (p.F52L); HEK293 cell transfection with immunofluorescence distribution and microtubule co-sedimentation (p.K56R)","journal":"Movement disorders; Parkinsonism & related disorders","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — in vitro binding assay plus cell-based localization across two independent studies for two different mutations","pmids":["24676999","27132499"],"is_preprint":false},{"year":2020,"finding":"Two novel DCTN1 frameshift/missense mutations alter subcellular localization: c.626dupC causes nuclear trapping of p150Glued and loss of colocalization with α-tubulin (producing a truncated protein by Western blot), while c.3823C>T causes cytoplasmic aggregate formation with loss of α-tubulin colocalization, establishing that these mutations disrupt normal cytoplasmic/microtubule association of DCTN1.","method":"In vitro transfection of mutant constructs with immunofluorescence and Western blot","journal":"Annals of clinical and translational neurology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, overexpression system only, no rescue or additional functional assay","pmids":["32023010"],"is_preprint":false},{"year":2025,"finding":"The DCTN1-RET fusion oncogene activates RET through CC (coiled-coil) domain-mediated dimerization: deletion of the CC domain from DCTN1 abrogated dimer formation and reduced RET autophosphorylation and ERK phosphorylation. Cells expressing DCTN1-RET showed enhanced proliferation and in vivo tumorigenesis; RET inhibitor TAS0286 suppressed DCTN1-RET autophosphorylation and tumor growth in a mouse subcutaneous model.","method":"Expression vector construction, CC-domain deletion mutants, cell line stable expression, in vitro kinase/phosphorylation assays, in vivo mouse tumor model, RET inhibitor treatment","journal":"Anticancer research","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — domain deletion mutagenesis with phosphorylation readout plus in vivo validation, single lab","pmids":["40155036"],"is_preprint":false},{"year":2017,"finding":"DCTN1-G71A transgenic mice (expressing human DCTN1-G71A under Thy1 promoter) developed decreased exploratory activity and impaired motor coordination with age, recapitulating apathy and parkinsonism of Perry syndrome, establishing that a single DCTN1 mutation is sufficient to cause these behavioral phenotypes. TDP-43 aggregates were not detected in substantia nigra or cortex of these mice (negative finding).","method":"Transgenic mouse generation and behavioral battery (open field, rotarod, beam-walking); immunohistochemistry for TDP-43","journal":"Neuroscience letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — defined genetic model with behavioral phenotypic readout, single lab, single transgenic approach","pmids":["29273399"],"is_preprint":false},{"year":2021,"finding":"Dctn1 knock-in mice carrying G71A showed depression-like behavior (immobility in tail suspension test), motor deficits (beam-walking, pole test), and reduced tyrosine hydroxylase immunoreactivity in substantia nigra neurons, confirming that the heterozygous G71A point mutation alone is sufficient to cause dopaminergic neuron dysfunction and Perry disease-relevant behavioral phenotypes.","method":"Knock-in mouse model, behavioral battery, TH immunohistochemistry with quantification","journal":"Neuroscience letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — knock-in (more rigorous than transgenic) with multiple behavioral assays and histological quantification, single lab","pmids":["34508845"],"is_preprint":false},{"year":2026,"finding":"Perry disease DCTN1 CAP-Gly domain variants (p.Arg32Cys, p.Gly67Ser, p.Gly71Arg) impair localization of p150Glued, induce TDP-43 pathology, and alter lysosomal positioning in functional cell-based studies, linking CAP-Gly domain integrity to correct intracellular trafficking.","method":"Functional cell studies: immunofluorescence for p150Glued localization, TDP-43 distribution, and lysosomal positioning","journal":"Movement disorders","confidence":"Low","confidence_rationale":"Tier 3 / Weak — cell-based overexpression assay, limited methodological detail in abstract, single lab","pmids":["41724579"],"is_preprint":false}],"current_model":"DCTN1 encodes p150Glued, the largest subunit of the dynactin complex, whose CAP-Gly domain directly binds microtubules and the EB1 tip-tracking protein to mediate dynein-dependent retrograde axonal transport; disease-associated mutations in the CAP-Gly domain impair microtubule binding, cause protein mislocalization and aggregation, disrupt DCTN1's direct interaction with TDP-43 (promoting TDP-43 cytoplasmic mislocalization), delay stress granule disassembly, and compromise the ubiquitin-proteasome system as the primary clearance route for the protein; in osteoclasts DCTN1 functions upstream of a Cdc42/PAK2 signaling axis required for differentiation, and in cancer contexts DCTN1 coiled-coil domains drive oncogenic fusion-protein dimerization and kinase activation."},"narrative":{"mechanistic_narrative":"DCTN1 encodes p150Glued, a microtubule-associated component of intracellular transport machinery whose integrity is required for neuronal, neuromuscular, and developmental function across species [PMID:37360176, PMID:24676999, PMID:27132499]. Its N-terminal CAP-Gly domain mediates microtubule binding, and disease-associated mutations in this region (p.F52L, p.K56R) reduce microtubule affinity and produce a diffuse or aberrant cytoplasmic distribution rather than the normal thread-like microtubule-associated pattern [PMID:24676999, PMID:27132499, PMID:38267040]. DCTN1 binds directly to TDP-43 through multiple regions of the protein, preferentially engaging TDP-43's C-terminal region, and loss or mutation of DCTN1 drives TDP-43 cytoplasmic mislocalization and aggregation; this is reinforced by a role in stress granule dynamics, where DCTN1 deficiency delays granule disassembly and promotes ubiquitin-positive TDP-43 inclusions and neurodegeneration in a Drosophila model [PMID:33924373, PMID:38311779]. Wild-type p150Glued is cleared primarily by the ubiquitin-proteasome system, with autophagy serving as a backup route for mutant aggregates when proteasome function is impaired [PMID:31654383]. Perry disease CAP-Gly variants are sufficient to cause the disorder: knock-in and transgenic mice carrying the G71A mutation develop parkinsonism-like motor deficits, depression-like behavior, and dopaminergic neuron dysfunction [PMID:29273399, PMID:34508845]. Beyond its transport-associated functions, DCTN1 acts upstream of a Cdc42/PAK2 signaling axis required for RANKL-induced osteoclastogenesis [PMID:32210358], and its coiled-coil domain drives oncogenic dimerization and RET kinase activation in the DCTN1-RET fusion [PMID:40155036].","teleology":[{"year":2010,"claim":"Established that the DCTN1 ortholog functions as a motor adaptor that targets a kinesin to a specific subcellular destination, defining a transport-directing role.","evidence":"Bimolecular fluorescence complementation of the UNC-104/DNC-1 complex in live C. elegans neurons","pmids":["21195138"],"confidence":"Medium","gaps":["Performed in invertebrate ortholog only","Does not establish the human dynein-dynactin partner architecture","Adaptor mechanism at axon termini not biochemically resolved"]},{"year":2011,"claim":"Showed DCTN1 is required in a non-neuronal developmental context, demonstrating its loss produces a quantifiable structural defect in sperm tail formation.","evidence":"In vivo siRNA microinjection into mouse seminiferous tubules with immunofluorescence and sperm morphology analysis","pmids":["21961240"],"confidence":"Medium","gaps":["Molecular mechanism in spermiogenesis not defined","No rescue experiment","Link to microtubule transport function not established"]},{"year":2014,"claim":"Demonstrated that disease-associated CAP-Gly mutations directly weaken DCTN1's core microtubule-binding activity, providing a biochemical basis for pathogenicity.","evidence":"In vitro microtubule-binding/co-sedimentation assays and HEK293 cell localization for p.F52L and p.K56R","pmids":["24676999","27132499"],"confidence":"Medium","gaps":["Cellular consequence of reduced microtubule affinity not connected to neuronal phenotype here","Overexpression systems used for localization","No structural model of mutant CAP-Gly"]},{"year":2017,"claim":"Showed a single DCTN1 mutation is sufficient to recapitulate Perry syndrome behavioral phenotypes in vivo, but uncoupled the behavior from detectable TDP-43 aggregation.","evidence":"Thy1-driven DCTN1-G71A transgenic mice with behavioral battery and TDP-43 immunohistochemistry","pmids":["29273399"],"confidence":"Medium","gaps":["TDP-43 aggregates not detected, leaving the molecular driver of behavior unresolved","Single transgenic approach","Overexpression may not reflect endogenous levels"]},{"year":2019,"claim":"Defined the clearance routes for DCTN1, establishing the proteasome as the primary degradation pathway and autophagy as an inducible backup for mutant aggregates.","evidence":"Pharmacological proteasome/autophagy inhibition and TFEB overexpression with viability assays in cultured cells","pmids":["31654383"],"confidence":"Medium","gaps":["E3 ligase and ubiquitination machinery not identified","Single lab","In vivo relevance of TFEB rescue untested"]},{"year":2020,"claim":"Placed DCTN1 upstream of a Cdc42/PAK2 signaling axis required for osteoclast differentiation, revealing a signaling role distinct from transport.","evidence":"siRNA knockdown with constitutively active Cdc42 rescue, Cdc42 activity and caspase-3 assays, and in vivo bone erosion model","pmids":["32210358"],"confidence":"High","gaps":["Mechanism by which DCTN1 activates Cdc42 not defined","Direct molecular link between DCTN1 and Cdc42 not shown","Connection to dynactin transport function unclear"]},{"year":2020,"claim":"Showed that frameshift/missense mutations redistribute p150Glued away from microtubules, either into nuclear trapping or cytoplasmic aggregates.","evidence":"In vitro transfection of mutant constructs with immunofluorescence and Western blot","pmids":["32023010"],"confidence":"Low","gaps":["Overexpression system only, no rescue or functional assay","Single lab","Pathogenic consequence of mislocalization not tested functionally"]},{"year":2021,"claim":"Mapped a direct DCTN1–TDP-43 interaction and showed a Perry mutation impairs it, identifying DCTN1 as a regulator of TDP-43 nucleocytoplasmic distribution.","evidence":"Co-immunoprecipitation, truncation mutant pulldown panel, and overexpression immunocytochemistry","pmids":["33924373"],"confidence":"Medium","gaps":["Interaction mapped in single lab","Stoichiometry and direct vs bridged binding not fully resolved","Multiple DCTN1 regions bind TDP-43, leaving the critical interface ambiguous"]},{"year":2021,"claim":"Confirmed with a knock-in model that heterozygous G71A alone causes dopaminergic neuron dysfunction and Perry disease-relevant behavior, strengthening causality at endogenous expression.","evidence":"G71A knock-in mice with behavioral battery and tyrosine hydroxylase immunohistochemistry","pmids":["34508845"],"confidence":"Medium","gaps":["Molecular pathway from mutation to dopaminergic loss not resolved","Single lab","TDP-43 pathology status in this model not addressed"]},{"year":2023,"claim":"Demonstrated that DCTN1 loss disrupts both neuronal and muscle function and alters synaptic gene splicing, linking DCTN1 to synapse organization downstream.","evidence":"Tissue-specific RNAi in Drosophila with behavioral assays, NMJ morphology, and RNA-seq","pmids":["37360176"],"confidence":"Medium","gaps":["Mechanism linking DCTN1 to splicing changes unknown","Invertebrate model","Direct vs indirect effect on synaptic genes unresolved"]},{"year":2024,"claim":"Connected DCTN1-dependent transport to TDP-43 proteostasis, showing DCTN1 deficiency delays stress granule disassembly and drives ubiquitin-positive TDP-43 inclusions and neurodegeneration.","evidence":"siRNA stress granule disassembly assays in cells plus Drosophila genetic knockdown with TDP-43 inclusion immunohistochemistry","pmids":["38311779"],"confidence":"Medium","gaps":["Whether the effect is via dynein transport or a direct DCTN1 role on granules not separated","Single lab","Mechanism of delayed disassembly not defined"]},{"year":2024,"claim":"Showed wild-type p150Glued can suppress aggregation of Perry mutants, implying a dominant-negative/sequestration mode of pathogenicity that differs from ALS-linked mutants.","evidence":"Co-overexpression of wild-type and mutant DCTN1 in HEK293T cells with immunofluorescence distribution analysis","pmids":["38267040"],"confidence":"Low","gaps":["Single method (ICC) in overexpression system, no biochemical validation","Mechanism of suppression not defined","Differential rescue of ALS vs Perry mutants unexplained"]},{"year":2025,"claim":"Revealed an oncogenic function in which the DCTN1 coiled-coil domain drives fusion-protein dimerization to activate RET kinase signaling.","evidence":"CC-domain deletion mutagenesis with kinase/phosphorylation readouts, cell proliferation, and in vivo mouse tumor model with RET inhibitor treatment","pmids":["40155036"],"confidence":"Medium","gaps":["Endogenous role of the DCTN1 coiled-coil distinct from fusion context","Single lab","Prevalence and clinical relevance of fusion not addressed"]},{"year":2026,"claim":"Extended CAP-Gly variant consequences to lysosomal positioning, tying CAP-Gly integrity to broader intracellular trafficking beyond microtubule binding and TDP-43.","evidence":"Cell-based immunofluorescence for p150Glued localization, TDP-43 distribution, and lysosomal positioning","pmids":["41724579"],"confidence":"Low","gaps":["Cell-based overexpression assay with limited methodological detail","Single lab","Mechanism linking p150Glued to lysosomal positioning unresolved"]},{"year":null,"claim":"How DCTN1's microtubule-transport function, its direct TDP-43 binding, and its signaling roles (Cdc42/PAK2) mechanistically converge to produce dopaminergic and motor neuron degeneration remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model linking CAP-Gly mutation to TDP-43 mislocalization","Relationship between transport defect and Cdc42 signaling unknown","Reason for tissue-specific vulnerability (dopaminergic vs motor neurons) undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[8,9]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[5]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[9,4]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[8]}],"pathway":[{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[5]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[2,10]}],"complexes":["dynactin"],"partners":["TDP-43","UNC-104/KIF1A","CDC42","RET"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q14203","full_name":"Dynactin subunit 1","aliases":["150 kDa dynein-associated polypeptide","DAP-150","DP-150","p135","p150-glued"],"length_aa":1278,"mass_kda":141.7,"function":"Part of the dynactin complex that activates the molecular motor dynein for ultra-processive transport along microtubules (By similarity). Plays a key role in dynein-mediated retrograde transport of vesicles and organelles along microtubules by recruiting and tethering dynein to microtubules. Binds to both dynein and microtubules providing a link between specific cargos, microtubules and dynein. Essential for targeting dynein to microtubule plus ends, recruiting dynein to membranous cargos and enhancing dynein processivity (the ability to move along a microtubule for a long distance without falling off the track). Can also act as a brake to slow the dynein motor during motility along the microtubule (PubMed:25185702). Can regulate microtubule stability by promoting microtubule formation, nucleation and polymerization and by inhibiting microtubule catastrophe in neurons. Inhibits microtubule catastrophe by binding both to microtubules and to tubulin, leading to enhanced microtubule stability along the axon (PubMed:23874158). Plays a role in metaphase spindle orientation (PubMed:22327364). Plays a role in centriole cohesion and subdistal appendage organization and function. Its recruitment to the centriole in a KIF3A-dependent manner is essential for the maintenance of centriole cohesion and the formation of subdistal appendage. Also required for microtubule anchoring at the mother centriole (PubMed:23386061). Plays a role in primary cilia formation (PubMed:25774020)","subcellular_location":"Cytoplasm; Cytoplasm, cytoskeleton; Cytoplasm, cytoskeleton, microtubule organizing center, centrosome; Cytoplasm, cytoskeleton, microtubule organizing center, centrosome, centriole; Cytoplasm, cytoskeleton, spindle; Nucleus envelope; Cytoplasm, cell cortex","url":"https://www.uniprot.org/uniprotkb/Q14203/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/DCTN1","classification":"Common Essential","n_dependent_lines":533,"n_total_lines":1208,"dependency_fraction":0.4412251655629139},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/DCTN1","total_profiled":1310},"omim":[{"mim_id":"619421","title":"DYNACTIN-ASSOCIATED PROTEIN; DYNAP","url":"https://www.omim.org/entry/619421"},{"mim_id":"617332","title":"TELOMERE REPEAT-BINDING BOUQUET FORMATION PROTEIN 1; TERB1","url":"https://www.omim.org/entry/617332"},{"mim_id":"616563","title":"STE20-LIKE PROTEIN KINASE; SLK","url":"https://www.omim.org/entry/616563"},{"mim_id":"616401","title":"SPINDLE APPARATUS COILED-COIL PROTEIN 1; SPDL1","url":"https://www.omim.org/entry/616401"},{"mim_id":"615289","title":"MITOTIC SPINDLE-POSITIONING PROTEIN; MISP","url":"https://www.omim.org/entry/615289"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Microtubules","reliability":"Supported"},{"location":"Cytokinetic bridge","reliability":"Additional"},{"location":"Mitotic spindle","reliability":"Additional"},{"location":"Primary cilium","reliability":"Additional"},{"location":"Basal body","reliability":"Additional"},{"location":"Acrosome","reliability":"Additional"},{"location":"Perinuclear theca","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/DCTN1"},"hgnc":{"alias_symbol":[],"prev_symbol":[]},"alphafold":{"accession":"Q14203","domains":[{"cath_id":"2.30.30.190","chopping":"32-97","consensus_level":"high","plddt":91.9202,"start":32,"end":97},{"cath_id":"-","chopping":"602-921","consensus_level":"medium","plddt":90.6784,"start":602,"end":921},{"cath_id":"-","chopping":"1197-1278","consensus_level":"medium","plddt":86.1323,"start":1197,"end":1278},{"cath_id":"1.20.5","chopping":"922-972","consensus_level":"medium","plddt":85.2727,"start":922,"end":972}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q14203","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q14203-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q14203-F1-predicted_aligned_error_v6.png","plddt_mean":76.62},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=DCTN1","jax_strain_url":"https://www.jax.org/strain/search?query=DCTN1"},"sequence":{"accession":"Q14203","fasta_url":"https://rest.uniprot.org/uniprotkb/Q14203.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q14203/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q14203"}},"corpus_meta":[{"pmid":"15326253","id":"PMC_15326253","title":"Point mutations of the p150 subunit of dynactin (DCTN1) gene in ALS.","date":"2004","source":"Neurology","url":"https://pubmed.ncbi.nlm.nih.gov/15326253","citation_count":349,"is_preprint":false},{"pmid":"16240349","id":"PMC_16240349","title":"Heterozygous R1101K mutation of the DCTN1 gene in a family with ALS and FTD.","date":"2005","source":"Annals of neurology","url":"https://pubmed.ncbi.nlm.nih.gov/16240349","citation_count":155,"is_preprint":false},{"pmid":"26062823","id":"PMC_26062823","title":"STUMP un\"stumped\": anti-tumor response to anaplastic lymphoma kinase (ALK) inhibitor based targeted therapy in uterine inflammatory myofibroblastic tumor with myxoid features harboring DCTN1-ALK fusion.","date":"2015","source":"Journal of hematology & oncology","url":"https://pubmed.ncbi.nlm.nih.gov/26062823","citation_count":80,"is_preprint":false},{"pmid":"28625595","id":"PMC_28625595","title":"DCTN1-related neurodegeneration: Perry syndrome and beyond.","date":"2017","source":"Parkinsonism & related disorders","url":"https://pubmed.ncbi.nlm.nih.gov/28625595","citation_count":77,"is_preprint":false},{"pmid":"24343258","id":"PMC_24343258","title":"DCTN1 mutation analysis in families with progressive supranuclear palsy-like phenotypes.","date":"2014","source":"JAMA neurology","url":"https://pubmed.ncbi.nlm.nih.gov/24343258","citation_count":47,"is_preprint":false},{"pmid":"33924373","id":"PMC_33924373","title":"DCTN1 Binds to TDP-43 and Regulates TDP-43 Aggregation.","date":"2021","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/33924373","citation_count":33,"is_preprint":false},{"pmid":"24676999","id":"PMC_24676999","title":"A novel DCTN1 mutation with late-onset parkinsonism and frontotemporal atrophy.","date":"2014","source":"Movement disorders : official journal of the Movement Disorder Society","url":"https://pubmed.ncbi.nlm.nih.gov/24676999","citation_count":33,"is_preprint":false},{"pmid":"20437543","id":"PMC_20437543","title":"Perry syndrome due to the DCTN1 G71R mutation: a distinctive levodopa responsive disorder with behavioral syndrome, vertical gaze palsy, and respiratory failure.","date":"2010","source":"Movement disorders : official journal of the Movement Disorder Society","url":"https://pubmed.ncbi.nlm.nih.gov/20437543","citation_count":33,"is_preprint":false},{"pmid":"27132499","id":"PMC_27132499","title":"DCTN1 p.K56R in progressive supranuclear palsy.","date":"2016","source":"Parkinsonism & related disorders","url":"https://pubmed.ncbi.nlm.nih.gov/27132499","citation_count":30,"is_preprint":false},{"pmid":"20702129","id":"PMC_20702129","title":"Autonomic failures in Perry syndrome with DCTN1 mutation.","date":"2010","source":"Parkinsonism & related 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The Perry disease mutation p.G71A impairs this TDP-43-binding ability. Overexpression of DCTN1-G71A, the dynactin-domain fragment, or C-terminal fragment induced cytoplasmic mislocalization and aggregation of TDP-43, identifying DCTN1 as a regulator of TDP-43 nucleocytoplasmic transport.\",\n      \"method\": \"Co-immunoprecipitation, truncation mutant pulldown panel, overexpression with immunocytochemistry\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal binding mapped with truncation panel and mutant, single lab, multiple orthogonal methods (Co-IP + ICC)\",\n      \"pmids\": [\"33924373\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"DCTN1 deficiency perturbs stress granule dynamics (delays their disassembly after stress) and thereby drives TDP-43 cytoplasmic aggregation in cultured cells; genetic knockdown of DCTN1 in a Drosophila ALS/FTD model accelerates ubiquitin-positive TDP-43 cytoplasmic inclusions and neurodegeneration. Knockdown of other microtubule-associated motor complexes (dynein, kinesin) similarly increased TDP-43 inclusions, placing intracellular transport along microtubules as a key upstream requirement.\",\n      \"method\": \"siRNA knockdown in cultured cells (stress granule disassembly assay), Drosophila genetic knockdown with immunohistochemistry for TDP-43 inclusions\",\n      \"journal\": \"Acta neuropathologica communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo genetic knockdown with defined phenotypic readout plus cell-based mechanistic assay, single lab\",\n      \"pmids\": [\"38311779\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"DCTN1 functions upstream of Cdc42/PAK2 signaling during RANKL-induced osteoclastogenesis: DCTN1 knockdown suppressed RANKL-induced Cdc42 activation, osteoclast formation, bone resorption, and induction of NFATc1/c-Fos; constitutively active Cdc42 rescued osteoclast differentiation in DCTN1-depleted precursors. PAK2 was identified as functioning downstream of Cdc42 in this axis. DCTN1 also inhibited caspase-3 activation/apoptosis during differentiation.\",\n      \"method\": \"siRNA knockdown, constitutively active Cdc42 rescue, Cdc42 activity assay, caspase-3 assay, in vivo bone erosion model\",\n      \"journal\": \"Experimental & molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — epistasis established by knockdown + rescue with activated Cdc42, multiple orthogonal assays, confirmed in animal model\",\n      \"pmids\": [\"32210358\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Wild-type DCTN1 is primarily degraded by the ubiquitin-proteasome system under normal conditions; autophagy is not the primary degradation route for either wild-type or G59S mutant DCTN1 under basal conditions. However, when proteasome activity is inhibited, autophagy acts as a backup clearance pathway for G59S DCTN1 aggregates. Overexpression of the autophagy master regulator TFEB promotes autophagic clearance of G59S aggregates and reduces cytotoxicity when proteasomes are impaired.\",\n      \"method\": \"Proteasome inhibitor treatment, autophagy inhibition, TFEB overexpression, cell viability assays in cultured cell model\",\n      \"journal\": \"Neurotoxicity research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological dissection of degradation pathways with multiple inhibitors and genetic rescue, single lab\",\n      \"pmids\": [\"31654383\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Wild-type p150Glued (DCTN1) co-overexpression suppresses aggregate formation by Perry disease-linked mutant p150Glued in HEK293T cells, indicating a dominant-negative or sequestration mechanism; this rescue was less effective for motor neuron disease-linked mutants. Perry disease mutations (but not control-associated variants) in the CAP-Gly domain caused cytoplasmic aggregation distinct from the thread-like distribution of wild-type or ALS-associated variants.\",\n      \"method\": \"Overexpression of wild-type and mutant DCTN1 constructs in HEK293T cells with immunofluorescence distribution analysis\",\n      \"journal\": \"Biological & pharmaceutical bulletin\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single method (ICC in overexpression system), no biochemical validation of mechanism\",\n      \"pmids\": [\"38267040\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"In C. elegans neurons, DNC-1 (the DCTN1/p150Glued ortholog) acts as an adaptor for kinesin-3 UNC-104(KIF1A): bimolecular fluorescence complementation (BiFC) showed that the UNC-104/DNC-1 complex localizes predominantly to axonal termini, in contrast to UNC-104/UNC-16 (soma) or UNC-104/SYD-2 (along axons), indicating that the DNC-1 adaptor directs the motor to axon terminals.\",\n      \"method\": \"Bimolecular fluorescence complementation (BiFC) in live C. elegans neurons\",\n      \"journal\": \"Neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct visualization of motor-adaptor complex in live neurons with defined subcellular localization outcome; single lab\",\n      \"pmids\": [\"21195138\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Dctn1 is localized to the sperm tail in mouse; in vivo siRNA-mediated knockdown of Dctn1 in mouse seminiferous tubules significantly increased sperm tail morphological abnormalities (~24% vs ~12% in controls), demonstrating a required role for DCTN1 in spermiogenesis/sperm tail formation.\",\n      \"method\": \"Western blot, indirect immunofluorescence for localization; in vivo siRNA microinjection into seminiferous tubules with sperm morphology analysis\",\n      \"journal\": \"Zhonghua nan ke xue (National journal of andrology)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct localization plus loss-of-function with quantitative phenotypic readout in vivo, single lab\",\n      \"pmids\": [\"21961240\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Neuron-specific or muscle-specific knockdown of Dctn1 (Drosophila ortholog of DCTN1) each independently caused climbing and flight defects in adult flies; global Dctn1 reduction caused larval mobility reduction and neuromuscular junction deficits prior to pupal lethality. RNA-seq revealed splicing alterations in genes required for synapse organisation, indicating that loss of DCTN1 disrupts synaptic gene expression downstream.\",\n      \"method\": \"Tissue-specific RNAi knockdown in Drosophila, behavioral assays, NMJ morphology, RNA-seq transcriptome profiling\",\n      \"journal\": \"Frontiers in neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic loss-of-function with multiple phenotypic readouts and transcriptomic follow-up, single lab\",\n      \"pmids\": [\"37360176\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"The DCTN1 p.F52L mutation impairs microtubule binding of p150Glued in vitro (compared to wild-type), and the DCTN1 p.K56R mutation reduces affinity for microtubules and causes a more diffuse cytoplasmic distribution in HEK293 cells compared to wild-type p150Glued.\",\n      \"method\": \"In vitro microtubule-binding assay (p.F52L); HEK293 cell transfection with immunofluorescence distribution and microtubule co-sedimentation (p.K56R)\",\n      \"journal\": \"Movement disorders; Parkinsonism & related disorders\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro binding assay plus cell-based localization across two independent studies for two different mutations\",\n      \"pmids\": [\"24676999\", \"27132499\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Two novel DCTN1 frameshift/missense mutations alter subcellular localization: c.626dupC causes nuclear trapping of p150Glued and loss of colocalization with α-tubulin (producing a truncated protein by Western blot), while c.3823C>T causes cytoplasmic aggregate formation with loss of α-tubulin colocalization, establishing that these mutations disrupt normal cytoplasmic/microtubule association of DCTN1.\",\n      \"method\": \"In vitro transfection of mutant constructs with immunofluorescence and Western blot\",\n      \"journal\": \"Annals of clinical and translational neurology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, overexpression system only, no rescue or additional functional assay\",\n      \"pmids\": [\"32023010\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"The DCTN1-RET fusion oncogene activates RET through CC (coiled-coil) domain-mediated dimerization: deletion of the CC domain from DCTN1 abrogated dimer formation and reduced RET autophosphorylation and ERK phosphorylation. Cells expressing DCTN1-RET showed enhanced proliferation and in vivo tumorigenesis; RET inhibitor TAS0286 suppressed DCTN1-RET autophosphorylation and tumor growth in a mouse subcutaneous model.\",\n      \"method\": \"Expression vector construction, CC-domain deletion mutants, cell line stable expression, in vitro kinase/phosphorylation assays, in vivo mouse tumor model, RET inhibitor treatment\",\n      \"journal\": \"Anticancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — domain deletion mutagenesis with phosphorylation readout plus in vivo validation, single lab\",\n      \"pmids\": [\"40155036\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"DCTN1-G71A transgenic mice (expressing human DCTN1-G71A under Thy1 promoter) developed decreased exploratory activity and impaired motor coordination with age, recapitulating apathy and parkinsonism of Perry syndrome, establishing that a single DCTN1 mutation is sufficient to cause these behavioral phenotypes. TDP-43 aggregates were not detected in substantia nigra or cortex of these mice (negative finding).\",\n      \"method\": \"Transgenic mouse generation and behavioral battery (open field, rotarod, beam-walking); immunohistochemistry for TDP-43\",\n      \"journal\": \"Neuroscience letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — defined genetic model with behavioral phenotypic readout, single lab, single transgenic approach\",\n      \"pmids\": [\"29273399\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Dctn1 knock-in mice carrying G71A showed depression-like behavior (immobility in tail suspension test), motor deficits (beam-walking, pole test), and reduced tyrosine hydroxylase immunoreactivity in substantia nigra neurons, confirming that the heterozygous G71A point mutation alone is sufficient to cause dopaminergic neuron dysfunction and Perry disease-relevant behavioral phenotypes.\",\n      \"method\": \"Knock-in mouse model, behavioral battery, TH immunohistochemistry with quantification\",\n      \"journal\": \"Neuroscience letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — knock-in (more rigorous than transgenic) with multiple behavioral assays and histological quantification, single lab\",\n      \"pmids\": [\"34508845\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Perry disease DCTN1 CAP-Gly domain variants (p.Arg32Cys, p.Gly67Ser, p.Gly71Arg) impair localization of p150Glued, induce TDP-43 pathology, and alter lysosomal positioning in functional cell-based studies, linking CAP-Gly domain integrity to correct intracellular trafficking.\",\n      \"method\": \"Functional cell studies: immunofluorescence for p150Glued localization, TDP-43 distribution, and lysosomal positioning\",\n      \"journal\": \"Movement disorders\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — cell-based overexpression assay, limited methodological detail in abstract, single lab\",\n      \"pmids\": [\"41724579\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"DCTN1 encodes p150Glued, the largest subunit of the dynactin complex, whose CAP-Gly domain directly binds microtubules and the EB1 tip-tracking protein to mediate dynein-dependent retrograde axonal transport; disease-associated mutations in the CAP-Gly domain impair microtubule binding, cause protein mislocalization and aggregation, disrupt DCTN1's direct interaction with TDP-43 (promoting TDP-43 cytoplasmic mislocalization), delay stress granule disassembly, and compromise the ubiquitin-proteasome system as the primary clearance route for the protein; in osteoclasts DCTN1 functions upstream of a Cdc42/PAK2 signaling axis required for differentiation, and in cancer contexts DCTN1 coiled-coil domains drive oncogenic fusion-protein dimerization and kinase activation.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"DCTN1 encodes p150Glued, a microtubule-associated component of intracellular transport machinery whose integrity is required for neuronal, neuromuscular, and developmental function across species [#7, #8]. Its N-terminal CAP-Gly domain mediates microtubule binding, and disease-associated mutations in this region (p.F52L, p.K56R) reduce microtubule affinity and produce a diffuse or aberrant cytoplasmic distribution rather than the normal thread-like microtubule-associated pattern [#8, #4]. DCTN1 binds directly to TDP-43 through multiple regions of the protein, preferentially engaging TDP-43's C-terminal region, and loss or mutation of DCTN1 drives TDP-43 cytoplasmic mislocalization and aggregation; this is reinforced by a role in stress granule dynamics, where DCTN1 deficiency delays granule disassembly and promotes ubiquitin-positive TDP-43 inclusions and neurodegeneration in a Drosophila model [#0, #1]. Wild-type p150Glued is cleared primarily by the ubiquitin-proteasome system, with autophagy serving as a backup route for mutant aggregates when proteasome function is impaired [#3]. Perry disease CAP-Gly variants are sufficient to cause the disorder: knock-in and transgenic mice carrying the G71A mutation develop parkinsonism-like motor deficits, depression-like behavior, and dopaminergic neuron dysfunction [#11, #12]. Beyond its transport-associated functions, DCTN1 acts upstream of a Cdc42/PAK2 signaling axis required for RANKL-induced osteoclastogenesis [#2], and its coiled-coil domain drives oncogenic dimerization and RET kinase activation in the DCTN1-RET fusion [#10].\",\n  \"teleology\": [\n    {\n      \"year\": 2010,\n      \"claim\": \"Established that the DCTN1 ortholog functions as a motor adaptor that targets a kinesin to a specific subcellular destination, defining a transport-directing role.\",\n      \"evidence\": \"Bimolecular fluorescence complementation of the UNC-104/DNC-1 complex in live C. elegans neurons\",\n      \"pmids\": [\"21195138\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Performed in invertebrate ortholog only\", \"Does not establish the human dynein-dynactin partner architecture\", \"Adaptor mechanism at axon termini not biochemically resolved\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Showed DCTN1 is required in a non-neuronal developmental context, demonstrating its loss produces a quantifiable structural defect in sperm tail formation.\",\n      \"evidence\": \"In vivo siRNA microinjection into mouse seminiferous tubules with immunofluorescence and sperm morphology analysis\",\n      \"pmids\": [\"21961240\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mechanism in spermiogenesis not defined\", \"No rescue experiment\", \"Link to microtubule transport function not established\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Demonstrated that disease-associated CAP-Gly mutations directly weaken DCTN1's core microtubule-binding activity, providing a biochemical basis for pathogenicity.\",\n      \"evidence\": \"In vitro microtubule-binding/co-sedimentation assays and HEK293 cell localization for p.F52L and p.K56R\",\n      \"pmids\": [\"24676999\", \"27132499\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Cellular consequence of reduced microtubule affinity not connected to neuronal phenotype here\", \"Overexpression systems used for localization\", \"No structural model of mutant CAP-Gly\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Showed a single DCTN1 mutation is sufficient to recapitulate Perry syndrome behavioral phenotypes in vivo, but uncoupled the behavior from detectable TDP-43 aggregation.\",\n      \"evidence\": \"Thy1-driven DCTN1-G71A transgenic mice with behavioral battery and TDP-43 immunohistochemistry\",\n      \"pmids\": [\"29273399\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"TDP-43 aggregates not detected, leaving the molecular driver of behavior unresolved\", \"Single transgenic approach\", \"Overexpression may not reflect endogenous levels\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Defined the clearance routes for DCTN1, establishing the proteasome as the primary degradation pathway and autophagy as an inducible backup for mutant aggregates.\",\n      \"evidence\": \"Pharmacological proteasome/autophagy inhibition and TFEB overexpression with viability assays in cultured cells\",\n      \"pmids\": [\"31654383\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"E3 ligase and ubiquitination machinery not identified\", \"Single lab\", \"In vivo relevance of TFEB rescue untested\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Placed DCTN1 upstream of a Cdc42/PAK2 signaling axis required for osteoclast differentiation, revealing a signaling role distinct from transport.\",\n      \"evidence\": \"siRNA knockdown with constitutively active Cdc42 rescue, Cdc42 activity and caspase-3 assays, and in vivo bone erosion model\",\n      \"pmids\": [\"32210358\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which DCTN1 activates Cdc42 not defined\", \"Direct molecular link between DCTN1 and Cdc42 not shown\", \"Connection to dynactin transport function unclear\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showed that frameshift/missense mutations redistribute p150Glued away from microtubules, either into nuclear trapping or cytoplasmic aggregates.\",\n      \"evidence\": \"In vitro transfection of mutant constructs with immunofluorescence and Western blot\",\n      \"pmids\": [\"32023010\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Overexpression system only, no rescue or functional assay\", \"Single lab\", \"Pathogenic consequence of mislocalization not tested functionally\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Mapped a direct DCTN1–TDP-43 interaction and showed a Perry mutation impairs it, identifying DCTN1 as a regulator of TDP-43 nucleocytoplasmic distribution.\",\n      \"evidence\": \"Co-immunoprecipitation, truncation mutant pulldown panel, and overexpression immunocytochemistry\",\n      \"pmids\": [\"33924373\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Interaction mapped in single lab\", \"Stoichiometry and direct vs bridged binding not fully resolved\", \"Multiple DCTN1 regions bind TDP-43, leaving the critical interface ambiguous\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Confirmed with a knock-in model that heterozygous G71A alone causes dopaminergic neuron dysfunction and Perry disease-relevant behavior, strengthening causality at endogenous expression.\",\n      \"evidence\": \"G71A knock-in mice with behavioral battery and tyrosine hydroxylase immunohistochemistry\",\n      \"pmids\": [\"34508845\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular pathway from mutation to dopaminergic loss not resolved\", \"Single lab\", \"TDP-43 pathology status in this model not addressed\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Demonstrated that DCTN1 loss disrupts both neuronal and muscle function and alters synaptic gene splicing, linking DCTN1 to synapse organization downstream.\",\n      \"evidence\": \"Tissue-specific RNAi in Drosophila with behavioral assays, NMJ morphology, and RNA-seq\",\n      \"pmids\": [\"37360176\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism linking DCTN1 to splicing changes unknown\", \"Invertebrate model\", \"Direct vs indirect effect on synaptic genes unresolved\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Connected DCTN1-dependent transport to TDP-43 proteostasis, showing DCTN1 deficiency delays stress granule disassembly and drives ubiquitin-positive TDP-43 inclusions and neurodegeneration.\",\n      \"evidence\": \"siRNA stress granule disassembly assays in cells plus Drosophila genetic knockdown with TDP-43 inclusion immunohistochemistry\",\n      \"pmids\": [\"38311779\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether the effect is via dynein transport or a direct DCTN1 role on granules not separated\", \"Single lab\", \"Mechanism of delayed disassembly not defined\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Showed wild-type p150Glued can suppress aggregation of Perry mutants, implying a dominant-negative/sequestration mode of pathogenicity that differs from ALS-linked mutants.\",\n      \"evidence\": \"Co-overexpression of wild-type and mutant DCTN1 in HEK293T cells with immunofluorescence distribution analysis\",\n      \"pmids\": [\"38267040\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Single method (ICC) in overexpression system, no biochemical validation\", \"Mechanism of suppression not defined\", \"Differential rescue of ALS vs Perry mutants unexplained\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Revealed an oncogenic function in which the DCTN1 coiled-coil domain drives fusion-protein dimerization to activate RET kinase signaling.\",\n      \"evidence\": \"CC-domain deletion mutagenesis with kinase/phosphorylation readouts, cell proliferation, and in vivo mouse tumor model with RET inhibitor treatment\",\n      \"pmids\": [\"40155036\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Endogenous role of the DCTN1 coiled-coil distinct from fusion context\", \"Single lab\", \"Prevalence and clinical relevance of fusion not addressed\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Extended CAP-Gly variant consequences to lysosomal positioning, tying CAP-Gly integrity to broader intracellular trafficking beyond microtubule binding and TDP-43.\",\n      \"evidence\": \"Cell-based immunofluorescence for p150Glued localization, TDP-43 distribution, and lysosomal positioning\",\n      \"pmids\": [\"41724579\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Cell-based overexpression assay with limited methodological detail\", \"Single lab\", \"Mechanism linking p150Glued to lysosomal positioning unresolved\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How DCTN1's microtubule-transport function, its direct TDP-43 binding, and its signaling roles (Cdc42/PAK2) mechanistically converge to produce dopaminergic and motor neuron degeneration remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model linking CAP-Gly mutation to TDP-43 mislocalization\", \"Relationship between transport defect and Cdc42 signaling unknown\", \"Reason for tissue-specific vulnerability (dopaminergic vs motor neurons) undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [8, 9]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [5]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [9, 4]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [5]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [2, 10]}\n    ],\n    \"complexes\": [\"dynactin\"],\n    \"partners\": [\"TDP-43\", \"UNC-104/KIF1A\", \"Cdc42\", \"RET\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}