Spatial and temporal regulation of protein kinase D (PKD)

Sharon A Matthews, Teresa Iglesias, Enrique Rozengurt, Doreen Cantrell

    Research output: Contribution to journalArticle

    108 Citations (Scopus)

    Abstract

    Protein kinase D (PKD; also known as PKCmicro) is a serine/threonine kinase activated by diacylglycerol signalling pathways in a variety of cells. PKD has been described previously as Golgi-localized, but herein we show that it is present within the cytosol of quiescent B cells and mast cells and moves rapidly to the plasma membrane after antigen receptor triggering. The membrane redistribution of PKD requires the diacylglycerol-binding domain of the enzyme, but is independent of its catalytic activity and does not require the integrity of the pleckstrin homology domain. Antigen receptor signalling initiates in glycosphingolipid-enriched microdomains, but membrane-associated PKD does not co-localize with these specialized structures. Membrane targeting of PKD is transient, the enzyme returns to the cytosol within 10 min of antigen receptor engagement. Strikingly, the membrane-recycled PKD remains active in the cytosol for several hours. The present work thus characterizes a sustained antigen receptor-induced signal transduction pathway and establishes PKD as a serine kinase that temporally and spatially disseminates antigen receptor signals away from the plasma membrane into the cytosol.
    Original languageEnglish
    Pages (from-to)2935-45
    Number of pages11
    JournalEMBO Journal
    Volume19
    Issue number12
    DOIs
    Publication statusPublished - 2000

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