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arXiv · 1512.07975

Enhanced diffusion of molecular motors in the presence of adenosine triphosphate and external force

Ryota Shinagawa·Kazuo Sasaki
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Abstract

The diffusion of a molecular motor in the presence of a constant external force is considered on the basis of a simple theoretical model. The motor is represented by a Brownian particle moving in a series of parabolic potentials placed periodically on a line, and the potential is switched stochastically from one parabola to another by a chemical reaction, which corresponds to the ATP hydrolysis or synthesis in motor proteins. It is found that the diffusion coefficient as a function of the force exhibits peaks. The mechanism of this diffusion enhancement and the possibility of observing it in F1-ATPase, a biological rotary motor, are discussed.

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Ryota Shinagawa, Kazuo Sasaki. 2015-12-25. Enhanced diffusion of molecular motors in the presence of adenosine triphosphate and external force. https://doi.org/10.7566/jpsj.85.064004

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