New insight into the mechanisms of voltage sensing and transduction in biological processes

The voltage sensor of voltage-gated ion channels is a conserved protein domain that senses millivolt changes in transmembrane potential, to regulate ion permeation through the channel. A recently discovered protein, Ci-VSP, has a voltage sensor that is coupled not to an ion channel but to a phosphatidylinositide phosphosphatase, the activity of which depends on membrane potential.

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