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

• 来源期刊: 中国物理B（英文版）
• 关键词: efficiency of collective non-processive motors ratchet model power-stroke elasticity
• 年，卷（期）: 2018,（12）
• 页码范围: 639-643
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/12/128701

摘要

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.