| 2012 |
A small 10-amino-acid WD motif in the KLC1 cargo protein Alcadein-α cytoplasmic region is necessary and sufficient to activate kinesin-1 through interaction with the tetratricopeptide repeat (TPR) region of KLC1, promoting vesicular association and anterograde transport; only part of the TPR structure is required for this activation in vivo. |
In vivo transport assays with artificial transmembrane proteins containing WD motifs, excess KLC1 competition experiments, and domain-deletion analysis of KLC1 TPR region |
Traffic (Copenhagen, Denmark) |
High |
22404616
|
| 2015 |
KLC1 associates with phagosomes derived from photoreceptor outer segment (POS) disk membranes in the retinal pigment epithelium (RPE) and remains associated during bidirectional microtubule-based movement (including pauses). Loss of KLC1 does not impair phagosome speed but reduces run length and impairs phagosome localization and degradation, leading to AMD-like RPE pathogenesis in aged mice. |
Live-cell imaging of RPE phagosomes, KLC1 knockout mice with phenotypic analysis including accumulation of RPE/sub-RPE deposits, oxidative and inflammatory stress markers |
The Journal of cell biology |
High |
26261180
|
| 2021 |
KLC1 acts as a selective adaptor within a tetrameric kinesin complex (KIF5A/KLC1) to bind the RNA-binding protein SFPQ, enabling long-distance axonal transport of SFPQ-RNA granules; this binding is required for axon survival and is disrupted by KIF5A mutations that cause Charcot-Marie Tooth disease. |
Co-immunoprecipitation of SFPQ with KIF5A/KLC1 complex, genetic loss-of-function (CMT-associated KIF5A mutants), axon degeneration assays, therapeutic rescue experiments |
The Journal of cell biology |
High |
33284322
|
| 2017 |
Phosphorylation of KLC1 at Thr466 abolishes its conventional interaction with JIP1b and eliminates the enhanced fast velocity (EFV) of APP anterograde transport by kinesin-1, without impairing a separate novel interaction between the central region of JIP1b and the coiled-coil domain of KLC1 that controls efficient high frequency (EHF) of transport. Phosphorylation at Thr466 increases in aged brains, correlating with decreased JIP1 binding to kinesin-1. |
Site-directed mutagenesis (Thr466Glu phosphomimetic), in vivo transport velocity measurements, co-immunoprecipitation, aged brain biochemistry |
Molecular biology of the cell |
High |
29093025
|
| 2018 |
Using isothermal titration calorimetry (ITC), seven KLC1 residues in the TPR domain were identified as critical for JIP1 binding; the autoinhibitory LFP-acidic motif of KLC1 marginally inhibits JIP1 binding by overlapping the same footprint; JIP1 and Alcadein-α W-acidic motif compete for the same KLC1-TPR binding site. |
Isothermal titration calorimetry with truncated KLC1 TPR fragments, mutagenesis of critical KLC1 residues, structural footprinting against published crystal structure of KLC1-TPR:JIP1 complex |
The Journal of biological chemistry |
High |
30026235
|
| 2019 |
DOC2B is phosphorylated upon insulin stimulation (at Y301), and this phosphorylation enhances its interaction with KLC1; mutation of Y301 in DOC2B blocks insulin-stimulated phosphorylation, abolishes interaction with KLC1, and blunts insulin-stimulated GLUT4 accumulation at the plasma membrane in skeletal muscle cells. |
Site-directed mutagenesis (Y301 in DOC2B), co-immunoprecipitation, mass spectrometry, skeletal-muscle-specific transgenic mice, GLUT4 plasma membrane accumulation assays |
Diabetologia |
High |
30707251
|
| 2009 |
Purified AMPK phosphorylates recombinant GST-KLC1 at Ser520 in vitro; however, overexpression of wild-type, phosphomimetic (S517/520D), or non-phosphorylatable (S517/520A) KLC1 mutants produced no difference in glucose-stimulated insulin granule transport dynamics, and no change in KLC1 Ser520 phosphorylation state was detected after AMPK activation. NEGATIVE RESULT: KLC1 phosphorylation at Ser517/520 does not regulate kinesin-1-mediated insulin granule transport. |
In vitro kinase assay with purified AMPK and recombinant GST-KLC1, overexpression of phosphomutants in MIN6 cells, 3D live-cell spinning disc confocal imaging of granule dynamics, phospho-specific antibody |
Islets |
Medium |
20074060 21099273
|
| 2014 |
KLC1 physically interacts with the mitochondrial fission protein Dynamin-1-like protein (Dnm1L/DRP1) through its TPR domains, and the two proteins co-localize in cultured cells; Dnm1L does not interact with KIF5 directly, suggesting KLC1 mediates post-fission mitochondrial transport. |
Yeast two-hybrid screening, co-localization in cultured cells |
Bioscience, biotechnology, and biochemistry |
Low |
25082190
|
| 1993 |
The human KLC1 gene was cloned; the encoded 569-amino-acid protein contains heptad repeats in the N-terminal domain (typical of cytoskeletal rod domains) and 21-mer repeats in the central and C-terminal domains; the gene was expressed in bacteria and CHO cells and provisionally assigned to chromosome 14q. |
cDNA cloning and sequencing, bacterial and CHO cell expression, chromosomal mapping |
DNA and cell biology |
Medium |
8274221
|
| 2024 |
CELF1 protein directly binds KLC1 RNA (demonstrated by CLIP-seq) and down-regulates the splice variant E of KLC1 (KLC1_vE); depletion of CELF1 in cultured cells increases KLC1_vE levels, while overexpression decreases them, establishing CELF1 as a writer controlling KLC1 alternative splicing. |
CELF1 depletion and overexpression in cultured cells, CLIP-seq database analysis, transcriptomic correlation in human brain samples |
Biochemical and biophysical research communications |
Medium |
38768546
|
| 2024 |
KLC1 binds CRMP2 in a manner dependent on CRMP2 residue R565 (R566 in zebrafish); the CRMP2 R566C mutation abolishes binding to KLC1 in transfected cultured cells, and knockdown of klc1a in zebrafish produces defective anterior commissure and postoptic commissure formation, phenocopying crmp2 knockdown, establishing a genetic interaction between CRMP2 and KLC1 in forebrain commissure formation. |
Co-immunoprecipitation in transfected cells (CRMP2 WT vs R566C mutant), zebrafish klc1a morpholino knockdown with commissure formation readout, crmp2 knockdown rescue experiments |
Developmental neurobiology |
Medium |
38830696
|
| 2025 |
Cryo-EM structure of the autoinhibited kinesin-1 heterotetramer reveals that KLC tetratricopeptide repeat (TPR) domains bind across folded KHC coiled-coils and wedge between KHC motor domains; additionally, KLC C-terminal helices occlude the TPR cargo-binding interfaces, providing a second layer of autoinhibition that directly blocks cargo engagement. Binding of regulatory factors (e.g., MAP7D3) competes with intramolecular KHC coiled-coil interactions to unfurl the autoinhibited structure. |
Cryo-EM structure determination, crosslinking mass spectrometry validation, functional motility studies, structural modeling |
bioRxivpreprint |
High |
bio_10.1101_2025.07.15.665000
|
| 2025 |
Binding of cargo-adaptor SLiM peptides to the KLC1 TPR domain dislocates the TPR 'shoulder' formed by docking of KHC coiled-coil 1 (CC1) onto the KLC TPR in the autoinhibited complex, freeing motor domains and promoting transition to the open, active state; this opening facilitates binding of the kinesin-1 cofactor MAP7 to the microtubule. |
Protein design, computational modelling, biophysical analysis (EM), electron microscopy of complete heterotetrameric holoenzyme with and without SLiM peptides |
bioRxivpreprint |
Medium |
bio_10.1101_2025.04.08.647705
|
| 2025 |
In vitro liposome transport assays show that kinesin-1 motors with KLC bound (KinΔC) exhibit autoinhibition on cargo: reduced MT run lengths, lower detachment forces, and ~3-fold lower MT landing rates compared to constitutively active motors; this autoinhibition is reversed by kinesore (a small molecule that overcomes KLC-mediated autoinhibition), demonstrating that cargo-bound KLC maintains partial autoinhibition that fine-tunes transport directionality at 3D microtubule intersections. |
In vitro liposome transport assay with near-full-length kinesin-1 + KLC, single-MT motility assays, kinesore pharmacological rescue, in silico mechanistic modeling |
bioRxivpreprint |
Medium |
bio_10.1101_2025.05.06.652443
|
| 2025 |
KLC1 interacts with dengue virus NS1 protein (confirmed by proximity ligation and co-immunoprecipitation in Aedes albopictus C6/36 cells); KLC1 decorates NS1-associated vacuoles; silencing KLC1 reduces viral genome synthesis, NS1 secretion, and virus progeny by ~1 log, and disrupts lipid droplet organization, establishing KLC1 as a host susceptibility factor for DENV replication in mosquito cells. |
Proximity ligation assay, co-immunoprecipitation, transmission immunoelectron microscopy, siRNA silencing, competitive peptide interference, viral titer and genome quantification, lipid droplet imaging |
bioRxivpreprint |
Medium |
40166163
|