CAMK2α is a ser/thr protein kinase that is a member of the Ca2+/calmodulin-dependent protein kinase family. CAMK2α is abundant in the brain as a major constituent of the postsynaptic density and is required for hippocampal long-term potentiation (LTP) and spatial learning. In addition to its CaCa2+/calmodulin-dependent activity, CAMK2α can undergo autophosphorylation, resulting in Ca2+/calmodulin-independent activity. The protein level of CAMK2α fluctuates during neuronal activity in cultured rat pup hippocampal neurons. The levels of CAMK2α increased with heightened neuronal activity.
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We show that alpha and betaCaMKII are inversely regulated by activity in hippocampal neurons in culture: the alpha/beta ratio shifts toward alpha during increased activity and beta during decreased activity. The swing in ratio is approximately 5-fold and may help
Science (New York, N.Y.), 257(5067), 206-211 (1992-07-10)
Although long-term potentiation (LTP) has been studied as the mechanism for hippocampus-dependent learning and memory, evidence for this hypothesis is still incomplete. The mice with a mutation in the alpha-calcium-calmodulin-dependent kinase II (alpha-CaMKII), a synaptic protein enriched in the hippocampus
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