A lattice relaxation algorithm for three-dimensional Poisson-Nernst-Planck theory with application to ion transport through the gramicidin A channel

被引：226

作者：

Kurnikova, MG

Coalson, RD ^{[1
]}

Graf, P

Nitzan, A

机构：

[1] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA

[2] Tel Aviv Univ, Dept Chem, IL-69978 Tel Aviv, Israel

来源：

BIOPHYSICAL JOURNAL | 1999年 / 76卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0006-3495(99)77232-2

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

A lattice relaxation algorithm is developed to solve the Poisson-Nernst-Planck (PNP) equations for ion transport through arbitrary three-dimensional volumes. Calculations of systems characterized by simple parallel plate and cylindrical pore geometries are presented in order to calibrate the accuracy of the method. A study of ion transport through gramicidin A dimer is carried out within this PNP framework. Good agreement with experimental measurements is obtained. Strengths and weaknesses of the PNP approach are discussed.

引用

页码：642 / 656

页数：15

共 61 条

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Aidley DJ., 1996, ION CHANNELS MOL ACT

[2] The heterogeneous collision velocity for hydrated ions in aqueous solutions is similar to 10(4) cm/s [J].