COMPUTER-SIMULATION OF THE TEMPERATURE-DEPENDENT AND HYDRATION-DEPENDENT LATERAL DIFFUSION OF PHOSPHATIDYLCHOLINE IN LIPID BILAYERS

被引:8
作者
GALLE, J
VOLKE, F
机构
[1] Department of Physics, University of Leipzig, D-04103 Leipzig
关键词
BILAYER MODEL; LATERAL DIFFUSION COEFFICIENTS; LATERAL DIFFUSION ACTIVATION ENERGY;
D O I
10.1016/0301-4622(94)00123-2
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A lattice model of a lipid bilayer near the so-called main phase transition between the liquid crystalline (L(alpha)) and the gel (L(beta)) phase is presented. It is based on a two-state model, Jump dynamics are defined for the lattice molecules to simulate lateral diffusion. The temperature and hydration dependence of the lateral diffusion coefficients of the model are calculated for the L(alpha) phase using Monte Carlo simulation techniques. The results obtained allow the estimation of the hydration dependent part of the lateral diffusion activation energy by thermodynamical quantities. We compare these results with measured activation energies of dipalmitoylphosphatidylcholine (DPPC) and propose a model to describe the total lateral diffusion activation energy of such systems.
引用
收藏
页码:109 / 117
页数:9
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