Importance of lipid-pore loop interface for potassium channel structure and function.

ABSTRACT: Potassium (i.e., K(+)) channels allow for the controlled and selective passage of potassium ions across the plasma membrane via a conserved pore domain. In voltage-gated K(+) channels, gating is the result of the coordinated action of two coupled gates: an activation gate at the intracellular entrance of the pore and an inactivation gate at the selectivity filter. By using solid-state NMR structural studies, in combination with electrophysiological experiments and molecular dynamics simulations, we show that the turret region connecting the outer transmembrane helix (transmembrane helix 1) and the pore helix behind the selectivity filter contributes to K(+) channel inactivation and exhibits a remarkable structural plasticity that correlates to K(+) channel inactivation. The transmembrane h

SUBMITTER: van der Cruijsen EA 

PROVIDER: S-EPMC3740848 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature