通过计算机模拟,直接观察贝塔针在明确水中的折叠和展开
Xiongwu Wu1, Shaomeng Wang, Bernard R Brooks
1Laboratory of Biophysical Chemistry, NHLBI, NIH, Building 50, Room 3308, Bethesda, Maryland 20892, USA. wuxw@nhlbi.nih.gov
Journal of the American Chemical Society
|May 9, 2002
概括
这项研究揭示了β-hairpin在水中的折叠. 侧链相互作用启动折叠,而键完成结构,由内力驱动.
科学领域:
- 生物物理学的生物物理.
- 计算化学计算化学
- 结构生物学 结构生物学
背景情况:
- β-hairpin结构是蛋白质折叠中的关键动机.
- 了解折叠动态是预测蛋白质结构的关键.
研究的目的:
- 为了研究在明确水中的β-hairpin的合作折叠和展开机制.
- 阐明侧链相互作用和键在折叠过程中的作用.
主要方法:
- 在明确的水中进行自导分子动力学 (MD) 模拟.
- 模拟的折叠结构与实验性核磁共振 (NMR) 核重复效应 (NOE) 数据的比较.
主要成果:
- 通过模拟获得的折叠β-hairpin结构显示出与NMR NOE数据的良好一致.
- 折叠是一种高度合作的过程,由侧链相互作用开始,其次是内键的形成.
- 展开开始于链间键的破坏.
结论:
- 内相互作用是β-hairpin折叠的主要驱动力.
- 溶剂相互作用作为折叠过程的障碍.
- 这项研究为β-hairpin折叠动态提供了原子层面的见解.
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