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Mol. Cell. Biol., 10 1997, 5996-6001, Vol 17, No. 10
PI Duncan, DF Stojdl, RM Marius and JC Bell
Controlled expression of cellular and viral genes through alternative
precursor messenger RNA (pre-mRNA) splicing requires serine/arginine- rich
(SR) proteins. The Clk1 kinase, which phosphorylates SR proteins, is
regulated through alternative splicing of the Clk1 pre-mRNA, yielding mRNAs
encoding catalytically active and truncated inactive polypeptides (Clk1 and
Clk1T, respectively). We present evidence that Clk1 and Clk1T proteins
regulate the splicing of Clk1 and adenovirus pre-mRNAs in vivo. The peptide
domain encoded by the alternatively spliced exon of Clk1 is essential for
the regulatory activity of the Clk1 kinase. This is the first direct
demonstration of an in vivo link between alternative splicing and protein
kinase activity.
Copyright © 1997, American Society for Microbiology
In vivo regulation of alternative pre-mRNA splicing by the Clk1 protein kinase
Ottawa Regional Cancer Centre, Ontario, Canada.
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