Article
Calcium-dependent regulation of the voltage-gated sodium channel hH1: intrinsic and extrinsic sensors use a common molecular switch.
Proceedings of the National Academy of Sciences of the United States of America - 7 Mar 2006
Shah Vikas N, Wingo Tammy L, Weiss Kevin L, Williams Christina K, Balser Jeffrey R, Chazin Walter J
Abstract excerpt
The function of the human cardiac voltage-gated sodium channel Na(V)1.5 (hH1) is regulated in part by binding of calcium to an EF hand in the C-terminal cytoplasmic domain. hH1 is also regulated via an extrinsic calcium-sensing pathway mediated by calmodulin (CaM) via binding to an IQ motif immediately adjacent to the EF-hand domain. The intrinsic EF-hand domain is shown here to interact with the IQ motif, which...
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