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Updated: Jul 17, 2026

Study of the Functions and Activities of Neuronal K-Cl Co-Transporter KCC2 Using Western Blotting
Published on: December 9, 2022
Importance of hydration and dynamics on the selectivity of the KcsA and NaK channels
Sergei Yu Noskov1, Benoît Roux
1Institute for Molecular Pediatric Sciences, Gordon Center for Integrative Sciences, University of Chicago, IL 60637, USA.
Abstract:
Fundamental concepts governing ion selectivity in narrow pores are reviewed and the microscopic factors responsible for the lack of selectivity of the NaK channel, which is structurally similar to the K+-selective KcsA channel, are elucidated on the basis of all-atom molecular dynamics free energy simulations. The results on NaK are contrasted and compared with previous studies of the KcsA channel. Analysis indicates that differences in hydration of the cation in the pore of NaK is at the origin of the lack of selectivity of NaK.
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