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Article
Water transport in aquaporins: molecular dynamics simulations
Mitsunori Ikeguchi1
1
Supramolecular Biology, International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. ike@tsurumi.yokohama-cu.ac.jp
DOI: 10.2741/3308 Volume 14 Issue 4, pp.1283-1291
Published: 01 January 2009
(This article belongs to the Special Issue Theoretical studies on water roles in biological systems)
Abstract

Aquaporins and aquaglyceroporins are membrane channel proteins that selectively transport water and small molecules such as glycerol across biological membranes. Molecular dynamics simulations have made substantial contributions toward understanding the permeation mechanisms of aquaporins in atomic detail. Osmotic pressure is the driving force of the transport by aquaporins. The osmotic water permeability of aquaporins can be estimated from equilibrium molecular dynamics simulations by using linear response theory. The relationship between osmotic permeability and channel structure was investigated by the recently proposed pf-matrix method. In addition to the water transport, other functions of aquaporins and aquaglyceroporins, i.e., glycerol permeation, proton blockage, and gating, have also been extensively studied by molecular dynamics simulations.

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Mitsunori Ikeguchi. Water transport in aquaporins: molecular dynamics simulations. Frontiers in Bioscience-Landmark. 2009. 14(4); 1283-1291.