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arXiv 1004.2696cond-mat.softcond-mat.stat-mech
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膜的比粘附力:有效键格子气的映射

Specific Adhesion of Membranes: Mapping to an Effective Bond Lattice Gas

Thomas Speck, Ellen Reister, Udo Seifert

摘要:

我们从理论上考虑特定的粘附波动膜硬基板通过连接到基板和膜中的配体之间的受体形成键。通过整合出的膜形状的自由度,我们表明,在生物学相关的限制特定的粘附是很好地描述了一个格子气模型,其中晶格位点对应于债券网站。我们推导出一个显式表达式的膜的热波动引起的有效键相互作用。此外,我们比较我们的格子气模型的动力学蒙特卡罗模拟与全动态模拟,考虑到膜的形状波动和受体和配体之间的反应在键合位点。我们表明,一个适当的映射的高度依赖的结合和非结合率在充分的计划率的格子气模型导致良好的协议。

英文摘要:

We theoretically consider specific adhesion of a fluctuating membrane to a hard substrate via the formation of bonds between receptors attached to the substrate and ligands in the membrane. By integrating out the degrees of freedom of the membrane shape, we show that in the biologically relevant limit specific adhesion is well described by a lattice gas model, where lattice sites correspond to bond sites. We derive an explicit expression for the effective bond interactions induced by the thermal undulations of the membrane. Furthermore, we compare kinetic Monte Carlo simulations for our lattice gas model with full dynamic simulations that take into account both the shape fluctuations of the membrane and reactions between receptors and ligands at bond sites. We demonstrate that an appropriate mapping of the height dependent binding and unbinding rates in the full scheme to rates in the lattice gas model leads to good agreement.

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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