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Related Experiment Video

Updated: Jun 26, 2026

Motility of Single Molecules and Clusters of Bi-Directional Kinesin-5 Cin8 Purified from S. cerevisiae Cells

Motility of Single Molecules and Clusters of Bi-Directional Kinesin-5 Cin8 Purified from S. cerevisiae Cells

Published on: February 2, 2022

Kinesin's walk: springy or gated head coordination?

Richard J Wilson¹

¹MOAC Centre, University of Warwick, Coventry CV4 7AL, UK. richard.j.wilson@warwick.ac.uk

|January 20, 2009

Summary

Kinesin motor proteins may not need an ATP binding gate to coordinate their movement. This study suggests entropic linker strain is sufficient for kinesin procession, simplifying models of cellular transport.

Area of Science:

Cell Biology
Biophysics
Molecular Motors

Background:

Conventional kinesin (kinesin-1) is essential for intracellular cargo transport.
Kinesin utilizes twin motor domains to walk along microtubule tracks, powered by ATP hydrolysis.
The precise mechanism of kinesin's coordinated head movement, or 'walk', remains under investigation.

Purpose of the Study:

To test the hypothesis that entropic linker strain, rather than an ATP binding gate, is sufficient for kinesin head coordination.
To explore kinesin's processive movement using an agent-based computer simulation of the rectified Brownian motion (RBM) model.

Main Methods:

Development of an agent-based computer simulation to model kinesin's RBM mechanism.
Simulation of kinesin head coordination without an explicit ATP binding gate.

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Related Experiment Videos

Last Updated: Jun 26, 2026

Motility of Single Molecules and Clusters of Bi-Directional Kinesin-5 Cin8 Purified from S. cerevisiae Cells

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Published on: February 2, 2022

Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins

Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins

Published on: January 26, 2019

Characterizing the Composition of Molecular Motors on Moving Axonal Cargo Using "Cargo Mapping" Analysis

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Published on: October 30, 2014

Application of hindering loads to the simulated kinesin to observe its behavior under stress.

Main Results:

Kinesin-like walking behavior emerged in the simulation without a gate coordinating the heads.
Simulated kinesin exhibited backstepping and detachment under load, mirroring in vitro observations.
Introducing an ATP hydrolysis gate to simulate waiting at obstacles reduced the model's realism under load.

Conclusions:

An RBM model without a gating mechanism is a viable candidate for explaining kinesin procession.
Entropic linker strain may be sufficient to enable kinesin's coordinated, processive movement.
The necessity of an ATP binding gate for kinesin head coordination is questioned, suggesting simpler mechanisms may be at play.