Calcinueurin is a calcium ion-dependent, calmodulin-stimulated protein phosphatase

Nicholas K. Tonks, Philip Cohen

    Research output: Contribution to journalArticle

    34 Citations (Scopus)

    Abstract

    A Ca2+-dependent, calmodulin-stimulated protein phosphatase (EC 3.1.3.16) is known to be associated with calcineurin, a major calmodulin binding protein in brain. The protein phosphatase activity has now been shown to be retained by a substrate affinity column (thiophosphorylated myosin P-light chain Sepharose) in the presence of Ca2+, and to be eluted specifically with EGTA. Calcineurin behaved identically. This establishes that calcineurin is the Ca2+-dependent protein phosphatase, and that interaction of Ca2+ with the B-subunit is essential for substrate binding.

    Original languageEnglish
    Pages (from-to)191-193
    Number of pages3
    JournalBiochimica et Biophysica Acta (BBA)/Protein Structure and Molecular
    Volume747
    Issue number1-2
    DOIs
    Publication statusPublished - 14 Sep 1983

    Keywords

    • Affinity chromatography
    • Ca-dependent protein phosphatase
    • Calcineurin
    • Calmodulin binding protein

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