Dataset Information


Kinesin-14 motors drive a right-handed helical motion of antiparallel microtubules around each other.

ABSTRACT: Within the mitotic spindle, kinesin motors cross-link and slide overlapping microtubules. Some of these motors exhibit off-axis power strokes, but their impact on motility and force generation in microtubule overlaps has not been investigated. Here, we develop and utilize a three-dimensional in vitro motility assay to explore kinesin-14, Ncd, driven sliding of cross-linked microtubules. We observe that free microtubules, sliding on suspended microtubules, not only rotate around their own axis but also move around the suspended microtubules with right-handed helical trajectories. Importantly, the associated torque is large enough to cause microtubule twisting and coiling. Further, our technique allows us to measure the in situ spatial extension of the motors between cross-linked microtubules to be about 20?nm. We argue that the capability of microtubule-crosslinking kinesins to cause helical motion of overlapping microtubules around each other allows for flexible filament organization, roadblock circumvention and torque generation in the mitotic spindle.


PROVIDER: S-EPMC7244531 | BioStudies | 2020-01-01

REPOSITORIES: biostudies

Similar Datasets

2020-01-01 | S-EPMC7015671 | BioStudies
2014-01-01 | S-EPMC4197412 | BioStudies
2013-01-01 | S-EPMC3767134 | BioStudies
1000-01-01 | S-EPMC4812750 | BioStudies
2018-01-01 | S-EPMC5992172 | BioStudies
2018-01-01 | S-EPMC6198040 | BioStudies
2008-01-01 | S-EPMC2500124 | BioStudies
1000-01-01 | S-EPMC4214779 | BioStudies
2017-01-01 | S-EPMC5216134 | BioStudies
1000-01-01 | S-EPMC5994901 | BioStudies