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- W2065371353 abstract "Activation gating in KcsA is elicited by changes in intracellular proton concentration. Thompson et al. identified a charge cluster around the inner gate that plays a key role in defining proton activation in KcsA. Here, through functional and spectroscopic approaches, we confirmed the role of this charge cluster and now provide a mechanism of pH-dependent gating. Channel opening is driven by a set of electrostatic interactions that include R117, E120 and E118 at the bottom of TM2 and H25 at the end of TM1. We propose that electrostatic compensation in this charge cluster stabilizes the closed conformation at neutral pH and that its disruption at low pH facilitates the transition to the open conformation by means of helix-helix repulsion." @default.
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- W2065371353 date "2010-02-06" @default.
- W2065371353 modified "2023-09-24" @default.
- W2065371353 title "A molecular mechanism for proton-dependent gating in KcsA" @default.
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- W2065371353 doi "https://doi.org/10.1016/j.febslet.2010.02.003" @default.
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