Molecular cloning of a brain-specific calcium/calmodulin-dependent protein kinase
- PMID: 3475713
- PMCID: PMC298983
- DOI: 10.1073/pnas.84.16.5962
Molecular cloning of a brain-specific calcium/calmodulin-dependent protein kinase
Abstract
A calcium/calmodulin-dependent protein kinase type II (CaM-K) alpha-subunit cDNA has been cloned from rat brain. This enzyme is encoded by a 5.1-kilobase mRNA expressed exclusively in the brain. Hybridization histochemistry reveals that the CaM-K mRNA expression corresponds to the distribution of the immunoreactive alpha-subunit protein, suggesting that the high enzyme levels in specific brain areas reflect regional differences in gene expression. The sequence of CaM-K alpha-subunit cDNA indicates a 478-amino acid (54-kDa) protein with three functional domains. The domain organization suggests a structural model for calcium/calmodulin-dependent and independent states that might subserve short- and long-term responses to transient stimuli.
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