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一种内在无序的蛋白质的结合折叠结合的机制
Paul Robustelli1, Stefano Piana1, David E Shaw1,2
1D. E. Shaw Research, New York, New York 10036, United States.
Journal of the American Chemical Society
|April 24, 2020
概括
内在无序的蛋白质 (IDP) 在结合时折叠. 分子动力学揭示了IDP使用诱导折叠路径,初始接触指导结构形成,有利于无序区域在结合中获得动力优势.
科学领域:
- 生物化学
- 结构生物学
- 分子动力学
背景情况:
- 固有无序蛋白质 (IDP) 缺乏稳定的结构,但在生物途径中至关重要.
- 国内流离失所者通常在与合作伙伴结合时采用有序结构,这一过程被称为"折叠结合".
研究的目的:
- 阐明IDP折叠结合的原子层结构机制.
- 描述麻疹病毒蛋白段的折叠结合机制.
主要方法:
- 没有偏见的分子动力学模拟.
- 在麻疹病毒NTAIL和XD之间分析了70多个结合和解结合事件.
主要成果:
- 折叠对结合主要通过诱导折叠路径发生.
- 过渡状态的特点是分子间接触很少,结构异质性很高.
- 在折叠-结合过程中,无序区域比折叠区域具有动力优势.
结论:
- 诱导折叠途径是IDP结合的关键.
- 过渡状态中的结构异质性是IDP结合的标志.
- 即使在最初的结合事件之后,失序区域也可以保持动力优势.
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