Chemical denaturants inhibit the onset of dewetting.

Chemical denaturants inhibit the onset of dewetting.
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化学变性剂抑制脱水的发作。

DOI:
10.1021/ja803972g
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发表时间:
2008-09-10
影响因子:
15
通讯作者:
Haran, Gilad
Haran, Gilad
中科院分区:
化学1区
文献类型:
--
作者:
England, Jeremy L.;Pande, Vijay S.;Haran, Gilad

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关于水溶液共溶解氯化胍和尿素变性蛋白质的机制仍存在争议。在这里,我们使用全原子分子动力学模拟来研究这两种变性剂对纳米疏水平板之间受限水的去湿的影响。结果发现,变性剂抑制了去湿的开始,因此去湿发生在比纯水中更短的板间距离。我们的结果支持尿素和胍在帮助非极性表面的溶剂化方面的作用,从而削弱了已知对蛋白质稳定性很重要的疏水效应。
The mechanism by which the aqueous cosolvents guanidinium chloride and urea denature proteins is a matter of controversy. Here, we use all-atom molecular dynamics simulations to study the effect of both denaturants on the dewetting of water confined between nanoseparated hydrophobic plates. It is found that the denaturants inhibit the onset of dewetting, so that it occurs at shorter interplate distances than in pure water. Our results support a role for urea and guanidinium in assisting in the solvation of nonpolar surfaces, thereby weakening hydrophobic effects known to be important for protein stability.
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影响因子: 11.1
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