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arXiv 1001.3540q-bio.BM
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局部过渡梯度决定了蛋白质能量景观的全局属性

Local transition gradients determine the global attributes of protein energy landscapes

Francesco Rao

摘要:

蛋白质的动力学特性是理解蛋白质功能的关键。从微观角度来看,蛋白质动力学由局部原子相互作用决定,而局部原子相互作用又引发功能性构象变化。不幸的是,局部原子波动和整体蛋白质重排之间的关系仍然是难以捉摸的。在这里,原子分子动力学模拟结合复杂网络分析表明,快速肽弛豫有效地建立了全球自由能景观的骨干,提供了本地和全球原子重排之间的连接。一个最小生成树表示,建立在过渡梯度网络的基础上,导致系统动力学和热力学的高分辨率映射,而不需要任何相关的自由度的先验知识。这些结果表明,在复杂的系统中通常观察到的高通信效率的本地机制的存在。

英文摘要:

The dynamical characterization of proteins is crucial to understand protein function. From a microscopic point of view, protein dynamics is governed by the local atomic interactions that, in turn, trigger the functional conformational changes. Unfortunately, the relationship between local atomic fluctuations and global protein rearrangements is still elusive. Here, atomistic molecular dynamics simulations in conjunction with complex network analysis show that fast peptide relaxations effectively build the backbone of the global free-energy landscape, providing a connection between local and global atomic rearrangements. A minimum-spanning-tree representation, built on the base of transition gradients networks, results in a high resolution mapping of the system dynamics and thermodynamics without requiring any a priori knowledge of the relevant degrees of freedom. These results suggest the presence of a local mechanism for the high communication efficiency generally observed in complex systems.

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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