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FEBS Lett. 1992 Jun 15;304(2-3):237-40.

Multiple Ca2+ signaling pathways converge on CaM kinase in PC12 cells.

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Department of Pharmacology, Stanford University School of Medicine, CA 94305-5332.


The role of multifunctional Ca2+/calmodulin-dependent protein kinase (CaM kinase) in mediating various Ca2+ signaling pathways was examined in PC12 cells. Conversion of the kinase to a Ca(2+)-independent form was used to monitor which neurotransmitters activate the enzyme in situ. CaM kinase responds to Ca2+ influx elicited by ligand-gated Ca2+ channels for ATP and acetylcholine. It also responds to Ca2+ mobilization of IP3-sensitive stores elicited by phospholipase C-linked receptors for ATP and acetylcholine as well as by caffeine. CaM kinase mediates the actions of many neurotransmitters and Ca2+ signaling pathways.

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