Molecular determinants of gating at the potassium-channel selectivity filter.
Cordero-Morales, J.F., Cuello, L.G., Zhao, Y., Jogini, V., Cortes, D.M., Roux, B., Perozo, E.(2006) Nat Struct Mol Biol 13: 311-318
- PubMed: 16532009 
- DOI: 10.1038/nsmb1069
- Primary Citation of Related Structures:  
1ZWI, 2ATK - PubMed Abstract: 
We show that in the potassium channel KcsA, proton-dependent activation is followed by an inactivation process similar to C-type inactivation, and this process is suppressed by an E71A mutation in the pore helix. EPR spectroscopy demonstrates that the inner gate opens maximally at low pH regardless of the magnitude of the single-channel-open probability, implying that stationary gating originates mostly from rearrangements at the selectivity filter ...