Ca2+ and phosphatidylinositol 4,5-bisphosphate stabilize a Gbeta gamma-sensitive state of Ca V2 Ca 2+ channels.


Direct interactions between G-protein betagamma subunits and N- or P/Q-type Ca(2+) channels mediate the inhibitory action of several neurotransmitters in the brain. Membrane potential, channel phosphorylation, or auxiliary subunit association tightly regulate these interactions and the consequent inhibition of Ca(2+) current. We now provide evidence that… (More)


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