The inhibitory effect of phospholemman on the sodium pump requires Its palmitoylation

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    Abstract

    Background: Phospholemman regulates the plasmalemmal sodium pump in excitable tissues such as the heart.

    Results: Phospholemman is palmitoylated at two intracellular cysteines, and this reduces ion transport by the sodium pump.

    Conclusion: Phospholemman must be palmitoylated to inhibit the sodium pump.

    Significance: This is a potentially new way to regulate the sodium pump, an enzyme expressed in most eukaryotic cells.

    Original languageEnglish
    Pages (from-to)36020-36031
    Number of pages12
    JournalJournal of Biological Chemistry
    Volume286
    Issue number41
    Early online date25 Aug 2011
    DOIs
    Publication statusPublished - 14 Oct 2011

    Keywords

    • Heart
    • Na,K-ATPase
    • Protein acylation
    • Protein palmitoylation
    • Protein phosphorylation
    • FXYD
    • Phospholemman

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