Dynamic regulation of the voltage-gated Kv2.1 potassium channel by multisite phosphorylation.

Abstract:

:Voltage-gated K(+) channels are key regulators of neuronal excitability. The Kv2.1 voltage-gated K(+) channel is the major delayed rectifier K(+) channel expressed in most central neurons, where it exists as a highly phosphorylated protein. Kv2.1 plays a critical role in homoeostatic regulation of intrinsic neuronal excitability through its activity- and calcineurin-dependent dephosphorylation. Here, we review studies leading to the identification and functional characterization of in vivo Kv2.1 phosphorylation sites, a subset of which contribute to graded modulation of voltage-dependent gating. These findings show that distinct developmental-, cell- and state-specific regulation of phosphorylation at specific sites confers a diversity of functions on Kv2.1 that is critical to its role as a regulator of intrinsic neuronal excitability.

journal_name

Biochem Soc Trans

authors

Mohapatra DP,Park KS,Trimmer JS

doi

10.1042/BST0351064

subject

Has Abstract

pub_date

2007-11-01 00:00:00

pages

1064-8

issue

Pt 5

eissn

0300-5127

issn

1470-8752

pii

BST0351064

journal_volume

35

pub_type

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