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arXiv 2109.00841cond-mat.softphysics.bio-ph
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受刚性膜约束的马达驱动丝状系统的图样形成与力学

Pattern formation and the mechanics of a motor-driven filamentous system confined by rigid membranes

Mitsusuke Tarama, Tatsuo Shibata

AI总结:

本文利用粗粒化分子动力学模型,揭示了耗尽力与马达主动力竞争导致肌动蛋白在刚性膜附近积累并形成高阶结构,且该现象具有普适性。

摘要:

本文研究了被刚性膜约束的肌动蛋白丝与肌球蛋白马达混合物的图样形成与力学。通过使用粗粒化分子动力学模型,我们证明了耗尽力与马达主动力之间的竞争导致肌动蛋白在膜附近积累。由此产生的肌动球蛋白结构对膜施加压力,由于丝状体的向列相排列,该压力在马达主动力较大时收敛至恒定值。结果与丝状体长度和膜曲率无关,表明该现象具有普适性。因此,本研究提出了一种新机制,细胞骨架组分可通过该机制自组织成高阶结构。

英文摘要:

Pattern formation and the mechanics of a mixture of actin filaments and myosin motors that is confined by a rigid membrane is investigated. By using a coarse-grained molecular dynamics model, we demonstrate that the competition between the depletion force and the active force of the motors gives rise to actin accumulation in the membrane vicinity. The resulting actomyosin structure exerts pressure on the membrane, that, due to nematic alignment of the filaments, converges to a constant for large motor active force. The results are independent of filament length and membrane curvature, indicating the universality of this phenomenon. Thus, this study proposes a novel mechanism by which the compounds of the cytoskeleton can self-organize into a higher-order structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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