期刊
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
卷 11, 期 1, 页码 260-275出版社
AMER CHEMICAL SOC
DOI: 10.1021/ct500477k
关键词
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资金
- Emil Aaltonen Foundation
- Rubicon Grant from The Netherlands Organization for Scientific Research (NWO)
Coarse-grained (CG) models allow simulation of larger systems for longer times by decreasing the number of degrees of freedom compared with all-atom models. Here we introduce an implicit-solvent version of the popular CG Martini model, nicknamed Dry Martini. To account for the omitted solvent degrees of freedom, the nonbonded interaction matrix underlying the Martini force field was reparametrized. The Dry Martini force field reproduces relatively well a variety of lipid membrane properties such as area per lipid, bilayer thickness, bending modulus, and coexistence of liquid-ordered and disordered domains. Furthermore, we show that the new model can be applied to study membrane fusion and tether formation, with results similar to those of the standard Martini model. Membrane proteins can also be included, but less quantitative results are obtained. The absence of water in Dry Martini leads to a significant speedup for large systems, opening the way to the study of complex multicomponent membranes containing millions of lipids.
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