Article
Isoform-dependent interaction of voltage-gated sodium channels with protons.
The Journal of physiology - 15 Oct 2006
Khan A, Kyle J W, Hanck D A, Lipkind G M, Fozzard H A
Abstract excerpt
Protons are potent physiological modifiers of voltage-gated Na(+) channels, shifting the voltage range of channel gating and reducing current magnitude (pK(a) approximately 6). We recently showed that proton block of the skeletal muscle isoform (Na(V)1.4) resulted from protonation of the four superficial carboxylates in the outer vestibule of the channel. We concluded that the large local negative electrostatic...
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