Efficiency of collective myosin Ⅱ motors studied with an elastic coupling power-stroke ratchet model

doi:10.1088/1674-1056/27/12/128701

Abstract

We proposed a modified ratchet model including power-stroke and elastic coupling to study the efficiency of collective non-processive motors such as myosin Ⅱ in muscle. Our theoretical results are in good agreement with the experimental data. Our study not only reveals that the maximum efficiency depends on elasticity and is independent of transition rates but also indicates that the parameters fitted to fast muscle are different from those fitted to a slow one. The latter may imply that the structure of the fast muscle is different from that of the slow one. The main reason that our model succeeds is that velocity in this model is an independent variable.

Keywords: efficiency of collective non-processive motors ratchet model power-stroke elasticity

Received: 31 July 2018
Revised: 24 September 2018
Accepted manuscript online:

PACS:

87.16.Nn

(Motor proteins (myosin, kinesin dynein))

Fund:

Project supported by the Key Research Program of Frontier Sciences of Chinese Academy of Sciences (Grant No. Y7Y1472Y61), the National Natural Science Foundation of China (Grant Nos. 11205123, 11574329, 11774358, 11747601, and 11675017), the Joint NSFC-ISF Research Program (Grant No. 51561145002), the CAS Biophysics Interdisciplinary Innovation Team Project (Grant No. 2060299), the CAS Strategic Priority Research Program (Grant No. XDA17010504), and the Fundamental Research Funds for the Central Universities (Grant No. 2017EYT24).

Corresponding Authors: Yao-Gen Shu
E-mail: shuyg@itp.ac.cn

Cite this article:

Zi-Qing Wang(汪自庆), Jin-Fang Li(李金芳), Ying-Ge Xie(解迎革), Guo-Dong Wang(王国栋), Yao-Gen Shu(舒咬根) Efficiency of collective myosin Ⅱ motors studied with an elastic coupling power-stroke ratchet model 2018 Chin. Phys. B 27 128701

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Efficiency of collective myosin Ⅱ motors studied with an elastic coupling power-stroke ratchet model

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