期刊
LANGMUIR
卷 29, 期 4, 页码 1162-1173出版社
AMER CHEMICAL SOC
DOI: 10.1021/la303959m
关键词
-
资金
- Department of Science and Technology (DST), Government of India
- DST-FIST [SR/FST/CSII-011/2005]
- Council for Scientific and Industrial Research (CSIR), New Delhi
The microscopic dynamic properties of water molecules present in the vicinity of a protein are expected to be sensitive to its local conformational motions and the presence of polar and charged groups at the surface capable of anchoring water molecules through hydrogen bonds. In this work, we attempt to understand such sensitivity by performing detailed molecular dynamics simulations of the globular protein barstar solvated in aqueous medium. Our calculations demonstrate that enhanced confinement at the protein surface on freezing its local motions leads to increasingly restricted water mobility with long residence times around the secondary structures. It is found that the inability of the surface water molecules to bind with the protein residues by hydrogen bonds in the absence of protein-water (PW) electrostatic interactions is compensated by enhanced water-water hydrogen bonds around the protein with uniform bulklike behaviors. Importantly, it is further noticed that in contrast to the PW hydrogen bond relaxation time scale, the kinetics of the breaking and formation of such bonds are not affected on freezing the protein's conformational motions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据