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高速量子力学电子光谱计算的生物分子结构信息

Jakob Seibert¹, Christoph Bannwarth¹, Stefan Grimme¹

¹Mulliken Center for Theoretical Chemistry, University of Bonn , D-53115 Bonn, Germany.

Journal of the American Chemical Society

|August 12, 2017

概括

这项研究引入了一种量子力学方法来计算生物分子谱,使蛋白质和DNA等复杂结构的分析成为可能. 这种方法有效地包括动态和量子效应以获得详细的分子洞察力.

科学领域:

计算化学
生物物理
光谱学

背景情况:

精确计算电子吸收 (UV-vis) 和循环二极化 (CD) 光谱对于理解生物分子结构和功能至关重要.
现有的方法往往需要系统特定的调整或碎片化,限制它们对大型复杂系统的适用性.
纳入充电转移和激子合等动态和量子力学效应对于现实的光谱预测至关重要.

研究的目的:

为计算大型生物分子的紫外线和CD光谱提供完全量子力学 (QM) 处理.
能够计算分子动力学 (MD) 模拟的光谱平均值,捕获非平衡和动态结构效应.
提供适用于各种生物分子系统的多功能和高效方法,无需碎片化或特定系统调整.

主要方法:

开发和应用stDA-xTB方法进行QM计算.
将分子动力学 (MD) 模拟与QM光谱计算集成.
量子力学处理整个生物分子系统,包括含有溶剂的大型DNA片段,寡和蛋白质.

主要成果:

在标准计算机上,sTDA-xTB方法可以在合理的时间内计算大型生物分子的紫外线和CD光谱.
这种方法成功地包括非平衡结构,形状灵活性,电荷转移和激子合效应.
该方法应用于多种系统,包括DNA,和蛋白质,证明其广泛适用性.

结论:

提出的QM方法提供了一种有效和准确的方法来计算生物分子光谱.
这种方法在与光谱学和X射线晶体学等实验技术相结合时,便于阐明复杂的生物分子结构.
这种方法对研究金属蛋白和其他复杂的生物分子尤为有希望.

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