Four-scale description of membrane sculpting by BAR domains
Four-scale description of membrane sculpting by BAR domains
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DOI：
10.1529/biophysj.108.132563
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发表时间：
2008-09-15
影响因子：
3.4
通讯作者：
Schulten, Klaus
中科院分区：
文献类型：
--
作者：
Arkhipov, Anton;Yin, Ying;Schulten, Klaus
BAR结构域是感知和塑造细胞中弯曲膜的蛋白质，提供了细胞形态发生机制的一个相对较好的研究实例。我们报告了在四个分辨率水平下通过BAR结构域进行的膜弯曲的计算研究，描述为：1），全原子分子动力学; 2），基于残基的粗粒化（解析单个氨基酸和脂质分子）; 3），基于形状的粗粒化（解析整体蛋白质和膜形状）;和4），连续弹性膜模型。BAR域集体进行的膜雕刻观察与实验一致。BAR域在膜表面上的不同安排被发现导致不同的膜曲率和弯曲动力学。
BAR domains are proteins that sense and sculpt curved membranes in cells, furnishing a relatively well-studied example of mechanisms employed in cellular morphogenesis. We report a computational study of membrane bending by BAR domains at four levels of resolution, described by 1), all-atom molecular dynamics; 2), residue-based coarse-graining (resolving single amino acids and lipid molecules); 3), shape-based coarse-graining (resolving overall protein and membrane shapes); and 4), a continuum elastic membrane model. Membrane sculpting performed by BAR domains collectively is observed in agreement with experiments. Different arrangements of BAR domains on the membrane surface are found to lead to distinct membrane curvatures and bending dynamics.