arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.2245cond-mat.softcond-mat.stat-mech
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波动生物膜的大规模模拟

Large-scale simulations of fluctuating biological membranes

Andrea Pasqua, Lutz Maibaum, George Oster, Daniel A. Fletcher, Phillip L. Geissler

摘要:

我们提出了一个简单的,和物理动机,粗粒度的脂质双层模型,适合微米级的计算机模拟。每一个~25 nm^2的双分子层片都由一个球形粒子代表。模拟疏水缔合力,多粒子相互作用抑制每个球的赤道暴露于其隐含的溶剂环境。高赤道密度的要求稳定了二维结构,而不需要晶体顺序,使我们能够匹配天然脂质膜的弹性和流动性。我们说明了该模型的多功能性和现实主义通过表征膜响应一个刺纳米棒。

英文摘要:

We present a simple, and physically motivated, coarse-grained model of a lipid bilayer, suited for micron scale computer simulations. Each ~25 nm^2 patch of bilayer is represented by a spherical particle. Mimicking forces of hydrophobic association, multi-particle interactions suppress the exposure of each sphere's equator to its implicit solvent surroundings. The requirement of high equatorial density stabilizes two-dimensional structures without necessitating crystalline order, allowing us to match both the elasticity and fluidity of natural lipid membranes. We illustrate the model's versatility and realism by characterizing membrane response to a prodding nanorod.

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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