A Consensus CaMK IV-responsive RNA Sequence Mediates Regulation of Alternative Exons in Neurons

Overview

Journal RNA

Specialty Molecular Biology

Date 2005 Nov 30

PMID 16314456

Citations 35

Authors

Jiuyong Xie

Calvin Jan

Peter Stoilov

Jennifer Park

Douglas L Black

Affiliations

Soon will be listed here.

Abstract

Neurons make extensive use of alternative pre-mRNA splicing to regulate gene expression and diversify physiological responses. We showed previously in a pituitary cell line that the Ca(++)/calmodulin-dependent protein kinase CaMK IV specifically repressed splicing of the BK channel STREX exon. This repression is dependent on a CaMK IV-responsive RNA element (CaRRE) within the STREX 3' splice site. Here, we report that similar Ca(++) regulation of splicing, mediated by L-type calcium channels and CaM kinase IV, occurs in cultured neurons and in the brain. We identify a critical CaRRE motif (CACATNRTTAT) that is essential for conferring CaMK IV repression on an otherwise constitutive exon. Additional Ca(++)-regulated exons that carry this consensus sequence are also identified in the human genome. Thus, the Ca(++)/CaMK IV pathway in neurons controls the alternative splicing of a group of exons through this short CaRRE consensus sequence. The functions of some of these exons imply that splicing control through the CaMK IV pathway will alter neuronal activity.

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