Budding dynamics of individual domains in multicomponent membranes simulated by N-varied dissipative particle dynamics

被引:50
作者
Hong, Bingbing [1 ]
Qiu, Feng [1 ]
Zhang, Hongdong [1 ]
Yang, Yuliang [1 ]
机构
[1] Fudan Univ, Dept Macromol Sci, Minist Educ, Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China
关键词
D O I
10.1021/jp066046h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We study the budding dynamics of individual domains in flat, multicomponent membranes using dissipative particle dynamics (DPD) simulations with varied bead number N, in which addition and deletion of beads based on their density at the membrane boundary is introduced. The budding process of a tubular bud, accompanied by a dynamical transition reflected in the energy and morphology evolutions, is investigated. The simulations show that budding duration is shortened with increasing line tension and depends on the domain size quadratically. At low line tension, increasing bending modulus accelerates budding at first, but suppresses the process as it increases further. In addition, the controlling role of the surface tension in the budding process is also explored. Finally, we use the N-varied DPD to simulate the experimentally observed multicomponent tubular vesicles, and the three bud growth modes are confirmed.
引用
收藏
页码:5837 / 5849
页数:13
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