Gating at the selectivity filter of ion channels that conduct Na+ and K+ ions.
The NaK channel is a cation selective channel with similar permeability for K(+) and Na(+). The available crystallographic structure of wild-type (WT) NaK is usually associated with a conductive state of the channel. Here, potential of mean force for complete conduction events of Na(+) and K(+) ions through NaK show that: i), large energy barriers prevent the passage of ions through the WT NaK structure, ii), the barriers are correlated to the presence of a hydrogen bond between Asp-66 and As...Expand abstract
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