文章基本信息

标题：Clustering and dynamics of crowded proteins near membranes and their influence on membrane bending
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作者：Grzegorz Nawrocki ; Wonpil Im ; Yuji Sugita 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2019
卷号：116
期号：49
页码：24562-24567
DOI：10.1073/pnas.1910771116
出版社：The National Academy of Sciences of the United States of America
摘要：Atomistic molecular dynamics simulations of concentrated protein solutions in the presence of a phospholipid bilayer are presented to gain insights into the dynamics and interactions at the cytosol–membrane interface. The main finding is that proteins that are not known to specifically interact with membranes are preferentially excluded from the membrane, leaving a depletion zone near the membrane surface. As a consequence, effective protein concentrations increase, leading to increased protein contacts and clustering, whereas protein diffusion becomes faster near the membrane for proteins that do occasionally enter the depletion zone. Since protein–membrane contacts are infrequent and short-lived in this study, the structure of the lipid bilayer remains largely unaffected by the crowded protein solution, but when proteins do contact lipid head groups, small but statistically significant local membrane curvature is induced, on average..
关键词：molecular dynamics ; diffusion ; crowding ; membrane curvature ; phospholipids