Optimization of Slipids Force Field Parameters Describing Headgroups of Phospholipids.
Optimization of Slipids Force Field Parameters Describing Headgroups of Phospholipids.
复制标题
DOI:
10.1021/acs.jpcb.0c06386
复制
发表时间:
2020-10-08
期刊:
影响因子:
--
通讯作者:
Lyubartsev AP
中科院分区:
文献类型:
--
作者:
Grote F;Lyubartsev AP
The molecular mechanics force field Slipids developed in a series of works by Jämbeck and Lyubartsev (J. Phys. Chem. B2012, 116, 3164–3179; J. Chem. Theory Comput.2012, 8, 2938–2948) generally provides a good description of various lipid bilayer systems. However, it was also found that order parameters of C–H bonds in the glycerol moiety of the phosphatidylcholine headgroup deviate significantly from NMR results. In this work, the dihedral force field parameters have been reparameterized in order to improve the agreement with experiment. For this purpose, we have computed energies for a large amount of lipid headgroup conformations using density functional theory on the B3P86/cc-pvqz level and optimized dihedral angle parameters simultaneously to provide the best fit to the quantum chemical energies. The new parameter set was validated for three lipid bilayer systems against a number of experimental properties including order parameters, area per lipid, scattering form factors, bilayer thickness, area compressibility and lateral diffusion coefficients. In addition, the order parameter dependence on cholesterol content in the POPC bilayer was investigated. It is shown that the new force field significantly improves agreement with the experimental order parameters for the lipid headgroup while keeping good agreement with other experimentally measured properties.
登录
查看更多内容
影响因子:
9.8
作者:
Ghahremanpour MM;van Maaren PJ;van der Spoel D
通讯作者:
van der Spoel D
影响因子:
3.3
作者:
Ferreira, Tiago Mendes;Coreta-Gomes, Filipe;Topgaard, Daniel
通讯作者:
Topgaard, Daniel
影响因子:
3.4
作者:
Kasimova, Marina A.;Tarek, Mounir;Delemotte, Lucie
通讯作者:
Delemotte, Lucie
DOI:
10.1038/nrm2668
发表时间:
2009-05
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
4.4
作者:
JORGENSEN, WL;CHANDRASEKHAR, J;KLEIN, ML
通讯作者:
KLEIN, ML