Determination of the charge profile in the KcsA selectivity filter using ab initio calculations and molecular dynamics simulations
Literature Information
Sebastian Kraszewski, Céline Boiteux, Christophe Ramseyer, Claude Girardet
The charge profile of K+ and Na+ ions moving in a single file across the filter of the KcsA channel is determined using both molecular dynamics simulations and ab initio calculations. We show a strong correlation between the charge variation and the ion location resulting in a saw-tooth profile, which provides additional information on the influence of charge transfer on the permeation and selectivity of the channel.
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