RGD Reference Report - P400 protein is one of the major substrates for Ca2+/calmodulin-dependent protein kinase II in the postsynaptic density-enriched fraction isolated from rat cerebral cortex, hippocampus and cerebellum. - Rat Genome Database

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P400 protein is one of the major substrates for Ca2+/calmodulin-dependent protein kinase II in the postsynaptic density-enriched fraction isolated from rat cerebral cortex, hippocampus and cerebellum.

Authors: Suzuki, T  Abe-Dohmae, S  Tanaka, R 
Citation: Suzuki T, etal., Neurochem Int. 1992 Jan;20(1):61-7.
RGD ID: 1582341
Pubmed: PMID:1338970   (View Abstract at PubMed)

Concanavalin A-binding glycoprotein with 250 K M(r) found in the postsynaptic density (PSD)-enriched preparation (or synaptic cytoskeleton) from rat cerebellum was identified with P400 protein from the physicochemical properties and enrichment in the cerebellum. Proteins homologous to the cerebellar 250 K M(r) protein occurred in the PSD-enriched preparations from rat cerebral cortex and from hippocampus, although the contents in the preparations were very low. The 250 K M(r) proteins in the PSD-enriched preparations from cerebellum and from cerebrum were highly phosphorylated by Ca2+/calmodulin (CaM)-dependent protein kinase II. The protein of synaptic plasma membrane (SPM) and PSD-enriched fractions prepared from cerebral cortex were not phosphorylated by the cAMP-dependent protein kinase endogenous to the fractions, whereas the protein from cerebellum was done in SPM and PSD-enriched fractions. The facts suggest that P400 or P400-like protein is closely associated with Ca2+/CaM-dependent protein kinase II in the PSD-enriched preparations, especially in the preparation from cerebral cortex. Phosphorylation of the protein by Ca2+/CaM-dependent protein kinase II may play an important role in the postsynaptic function in both cerebellum and at least in some areas of cerebrum.

Objects referenced in this article
Gene Itpr1 inositol 1,4,5-trisphosphate receptor, type 1 Rattus norvegicus

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