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Cross-talk between the mechano-gated K2P channel TREK-1 and the actin cytoskeleton.


ABSTRACT: TREK-1 (KCNK2) is a K(2P) channel that is highly expressed in fetal neurons. This K(+) channel is opened by a variety of stimuli, including membrane stretch and cellular lipids. Here, we show that the expression of TREK-1 markedly alters the cytoskeletal network and induces the formation of actin- and ezrin-rich membrane protrusions. The genetic inactivation of TREK-1 significantly alters the growth cone morphology of cultured embryonic striatal neurons. Cytoskeleton remodelling is crucially dependent on the protein kinase A phosphorylation site S333 and the interactive proton sensor E306, but is independent of channel permeation. Conversely, the actin cytoskeleton tonically represses TREK-1 mechano-sensitivity. Thus, the dialogue between TREK-1 and the actin cytoskeleton might influence both synaptogenesis and neuronal electrogenesis.

SUBMITTER: Lauritzen I 

PROVIDER: S-EPMC1369110 | biostudies-literature | 2005 Jul

REPOSITORIES: biostudies-literature

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Cross-talk between the mechano-gated K2P channel TREK-1 and the actin cytoskeleton.

Lauritzen Inger I   Chemin Jean J   Honoré Eric E   Jodar Martine M   Guy Nicolas N   Lazdunski Michel M   Jane Patel Amanda A  

EMBO reports 20050701 7


TREK-1 (KCNK2) is a K(2P) channel that is highly expressed in fetal neurons. This K(+) channel is opened by a variety of stimuli, including membrane stretch and cellular lipids. Here, we show that the expression of TREK-1 markedly alters the cytoskeletal network and induces the formation of actin- and ezrin-rich membrane protrusions. The genetic inactivation of TREK-1 significantly alters the growth cone morphology of cultured embryonic striatal neurons. Cytoskeleton remodelling is crucially dep  ...[more]

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