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Biochem. Biophys. Res. Commun. Apr (2001); 282(4):882-6
Carbachol stimulates TYR phosphorylation and association of PKCdelta and PYK2 in pancreas.
Wrenn RW
Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta, Georgia 30912-2000, USA. rwrenn@mail.mcg.edu
Abstract: Carbachol treatment resulted in increased phosphorylation on tyrosine of PKCdelta immunoprecipitated from rat pancreatic acinar cells. The Ca2+-dependent tyrosine kinase PYK2 coimmunoprecipitated with PKCdelta from carbachol-exposed cells and also exhibited increased tyrosine phosphorylation. Tyrosine phosphorylation of both PKCdelta and PYK2 was concentration-dependent with respect to carbachol, and rapid, reaching maximal levels by 5 min of treatment. Exposure of acinar cells to phorbol myristate acetate (PMA), a phorbol ester activator of PKCdelta, also resulted in increased phosphorylation of PKCdelta and PYK2 isolated using anti-PKCdelta immunoprecipitation. These results are suggestive of a physical and functional interaction between PKCdelta and PYK2 following muscarinic stimulation in the pancreatic acinar cell.
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Chris Stark, Bobby-Joe Breitkreutz, Teresa Reguly, Lorrie Boucher, Ashton Breitkreutz, Mike Tyers.
Nucleic Acids Res. Jan 1;34:D535-9.