Phosphorylation and Inactivation of Brain Glycogen Synthase by a Multifunctional Calmodulin‐Dependent Protein Kinase

Nobuhiro Inoue, Takafumi Iwasa, Kohji Fukunaga, Yasuhiko Matsukado, Eishichi Miyamoto

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Abstract: Glycogen synthase was partially purified from canine brain to about 70% purity. The purified enzyme showed differences from the properties of the skeletal muscle enzyme with respect to molecular weights of the holoenzyme and subunit and phosphopeptide mapping. The multifunctional calmodulin‐dependent protein kinase from the brain phosphorylated brain glycogen synthase with concomitant inactivation of the enzyme. Although about 1.3 mol of phosphate/mol subunit was maximally incorporated into glycogen synthase, 0.4 mol of phosphate/mol subunit was sufficient for the maximal inactivation of the enzyme. The results indicate that brain glycogen synthase is regulated in a calmodulin‐dependent manner similarly to the skeletal muscle enzyme, but that the brain enzyme is different from the skeletal muscle enzyme.

Original languageEnglish
Pages (from-to)981-988
Number of pages8
JournalJournal of Neurochemistry
Volume48
Issue number3
DOIs
Publication statusPublished - 1987 Mar
Externally publishedYes

Keywords

  • Brain
  • Glycogen synthase
  • Multifunctional calmodulin‐dependent protein kinase

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience

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