alexa Modulation by clamping: Kv4 and KChIP interactions.


Journal of Antivirals & Antiretrovirals

Author(s): Wang K

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Abstract The rapidly inactivating (A-type) potassium channels regulate membrane excitability that defines the fundamental mechanism of neuronal functions such as pain signaling. Cytosolic Kv channel-interacting proteins KChIPs that belong to neuronal calcium sensor (NCS) family of calcium binding EF-hand proteins co-assemble with Kv4 (Shal) alpha subunits to form a native complex that encodes major components of neuronal somatodendritic A-type K+ current, I(SA), in neurons and transient outward current, I(TO), in cardiac myocytes. The specific binding of auxiliary KChIPs to the Kv4 N-terminus results in modulation of gating properties, surface expression and subunit assembly of Kv4 channels. Here, I attempt to emphasize the interaction between KChIPs and Kv4 based on recent progress made in understanding the structure complex in which a single KChIP1 molecule laterally clamps two neighboring Kv4.3 N-termini in a 4:4 manner. Greater insights into molecular mechanism between KChIPs and Kv4 interaction may provide therapeutic potentials of designing compounds aimed at disrupting the protein-protein interaction for treatment of membrane excitability-related disorders. This article was published in Neurochem Res and referenced in Journal of Antivirals & Antiretrovirals

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