ArticleScience advances2024
Noncanonical interaction with microtubules via the N-terminal nonmotor domain is critical for the functions of a bidirectional kinesin.
Article in Science advances, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Disrupting VDAC1-tubulin interaction uncovers crosstalk between mitochondrial and microtubule functions with implication to cancer therapy.Cellular and molecular life sciences : CMLS · 2026Article
- Dimeric Cin8 motors have an inherent plus-end bias and weak interhead coordination.Biophysical journal · 2026Article
- Dimeric Cin8 motors have an inherent plus-end bias and weak inter-head coordination.bioRxiv : the preprint server for biology · 2025Article
- Selective regulation of kinesin-5 function by β-tubulin carboxy-terminal tails.The Journal of cell biology · 2025Article
- Mechanism and regulation of kinesin motors.Nature reviews. Molecular cell biology · 2025Review
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Authors and funding
14 authors.
Funding
Abstract
Several kinesin-5 motors (kinesin-5s) exhibit bidirectional motility. The mechanism of such motility remains unknown. Bidirectional kinesin-5s share a long N-terminal nonmotor domain (NTnmd), absent in exclusively plus-end-directed kinesins. Here, we combined in vivo, in vitro, and cryo-electron microscopy (cryo-EM) studies to examine the impact of NTnmd mutations on the motor functions of the bidirectional kinesin-5, Cin8. We found that NTnmd deletion mutants exhibited cell viability and spindle localization defects. Using cryo-EM, we examined the structure of a microtubule (MT)-bound motor domain of Cin8, containing part of its NTnmd. Modeling and molecular dynamic simulations based on the cryo-EM map suggested that the NTnmd of Cin8 interacts with the C-terminal tail of β-tubulin. In vitro experiments on subtilisin-treated MTs confirmed this notion. Last, we showed that NTnmd mutants are defective in plus-end-directed motility in single-molecule and antiparallel MT sliding assays. These findings demonstrate that the NTnmd, common to bidirectional kinesin-5s, is critical for their bidirectional motility and intracellular functions.
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