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Regulation of the Phosphorylation of Calpain II and Its Inhibitor

Overview
Publisher Springer
Specialty Biochemistry
Date 1994 Jul 27
PMID 7845369
Citations 3
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Abstract

Phosphorylation of calpain II (or its inhibitor) by the catalytic subunit of cyclic AMP-dependent protein kinase (A-PK), cyclic GMP-dependent protein kinase (G-PK), and protein kinase C (PK-C) was analyzed by SDS-polyacrylamide gel electrophoresis and autoradiography. Among these protein kinases, the catalytic subunit of A-PK exhibited the strongest phosphorylations of both calpain II and its inhibitor. Arachidonic acid and staurosporine effectively inhibited phosphorylation regardless the type of kinase tested. Despite its lack of effect on the phosphorylation of calpain II by the catalytic subunit of A-PK, sphingosine moderately enhanced the phosphorylation of calpain II by G-PK. Other agents, including phosphatidylethanolamine, phosphatidylinositol and 1, 2-dioleoyl-sn-glycerol, had no significant effect.

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