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Master equation approach for a cross-bridge power-stroke model with a finite number of motors
Ma, R; Li, M; Ou-Yang, ZC; Shu, YG; Ma, R (reprint author), Tsinghua Univ, Inst Adv Study, Beijing, Peoples R China.
2013
发表期刊PHYSICAL REVIEW E
ISSN1539-3755
卷号87期号:5页码:52718
摘要The cross-bridge power-stroke model has been widely used to describe the motion of large motor assemblies connected to a common rigid filament. In this paper, we go beyond the original velocity-ensemble approach and propose a master equation approach to account for the cooperative motion of a finite number of motors based on the cross-bridge model. By studying the force-velocity relationship for motors with strain-independent detachment rate, we show the convergence of our approach to the velocity-ensemble approach in the limit of large motor numbers. In the case that the detachment rate of motors is strain dependent, based on two assumptions for the strain distribution among motors, we show the occurrence of the bimodal distribution of the number of motors bound to the filament. This provides a new perspective to look at the instability of a multimotor system, which is essential for all the experimentally observed complex motions displayed by a group of motors, such as hysteresis, bidirectional motion, and spontaneous oscillation. By comparing the velocities calculated using the two assumptions with the stochastic simulation, it suggests that the coupling between motors via the common connection to the filament might facilitate the fast movement of filaments at small loading forces.
部门归属[Ma, Rui; Ou-Yang, Zhong-Can] Tsinghua Univ, Inst Adv Study, Beijing, Peoples R China; [Li, Ming] Univ Chinese Acad Sci, Sch Phys, Beijing, Peoples R China; [Ou-Yang, Zhong-Can; Shu, Yao-Gen] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100080, Peoples R China
关键词Molecular Motors Organelle Transport Cargo Transport Kinesin Muscle Contraction
学科领域Physics
资助者National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015]
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收录类别SCI
语种英语
资助者National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015] ; National Basic Research Program of China (973 program) [2013CB932804]; National Natural Science Foundation of China [91027045, 11075015]
WOS记录号WOS:000319738000012
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15357
专题理论物理所SCI论文
通讯作者Ma, R (reprint author), Tsinghua Univ, Inst Adv Study, Beijing, Peoples R China.
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GB/T 7714
Ma, R,Li, M,Ou-Yang, ZC,et al. Master equation approach for a cross-bridge power-stroke model with a finite number of motors[J]. PHYSICAL REVIEW E,2013,87(5):52718.
APA Ma, R,Li, M,Ou-Yang, ZC,Shu, YG,&Ma, R .(2013).Master equation approach for a cross-bridge power-stroke model with a finite number of motors.PHYSICAL REVIEW E,87(5),52718.
MLA Ma, R,et al."Master equation approach for a cross-bridge power-stroke model with a finite number of motors".PHYSICAL REVIEW E 87.5(2013):52718.
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