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arXiv 0907.4811cond-mat.softq-bio.BM
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类蛋白质相互作用模型中的单分散自组装

Monodisperse self-assembly in a model with protein-like interactions

Alex W. Wilber, Jonathan P. K. Doye, Ard A. Louis, Anna C. F. Lewis

摘要:

我们研究的自组装行为与“蛋白质样”的相互作用,可以被认为是一个极小模型组装的病毒衣壳和其他壳状蛋白质复合物的补丁颗粒。我们深入探讨的热力学和动力学的自组装作为模型的参数的函数,并找到所有考虑的目标结构的强大的组装。最佳组装发生在参数空间的区域中,其中自由能势垒调节成核速率,从而防止可能导致形成不完整壳的单体供应的过早耗尽。相互作用也需要足够具体,以防止畸形壳的组装,但同时保持动力学可达性。为我们的模型计算的自由能景观有一个漏斗状的地形引导系统形成的目标结构,并显示粒子间相互作用的扭转分量防止无序聚集体的形成,否则将作为动力学陷阱。

英文摘要:

We study the self-assembly behaviour of patchy particles with `protein-like' interactions that can be considered as a minimal model for the assembly of viral capsids and other shell-like protein complexes. We thoroughly explore the thermodynamics and dynamics of self assembly as a function of the parameters of the model and find robust assembly of all target structures considered. Optimal assembly occurs in the region of parameter space where a free energy barrier regulates the rate of nucleation, thus preventing the premature exhaustion of the supply of monomers that can lead to the formation of incomplete shells. The interactions also need to be specific enough to prevent the assembly of malformed shells, but whilst maintaining kinetic accessibility. Free-energy landscapes computed for our model have a funnel-like topography guiding the system to form the target structure, and show that the torsional component of the interparticle interactions prevents the formation of disordered aggregates that would otherwise act as kinetic traps.

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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