Water percolation governs polymorphic transitions and conductivity of DNA

被引：33

作者：

Brovchenko, Ivan

Krukau, Aliaksei

Oleinikova, Alla

Mazur, Alexey K.

机构：

[1] Univ Dortmund, D-44227 Dortmund, Germany

[2] CNRS, UPR9080, Inst Biol Physicochim, F-75005 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.97.137801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first computer simulation studies of the percolation transition of water at the surface of the DNA double helix. With increased hydration, the ensemble of small clusters merges into a spanning water network via a quasi-two-dimensional percolation transition. This transition occurs strikingly close to the hydration level where the B form of DNA becomes stable in experiment. Formation of spanning water networks results in sigmoidlike acceleration of long-range ion transport in good agreement with experiment.

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页数：4

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