Regulation of global translation during the cell cycle

Vilte Stonyte, Erik Boye, Beáta Grallert

    Research output: Contribution to journalArticle

    4 Scopus citations

    Abstract

    It is generally accepted that global translation varies during the cell cycle and is low during mitosis. However, addressing this issue is challenging because it involves cell synchronization, which evokes stress responses that, in turn, affect translation rates. Here, we have used two approaches to measure global translation rates in different cell-cycle phases. First, synchrony in different cell-cycle phases was obtained involving the same stress, by using temperature-sensitive mutants. Second, translation and DNA content were measured by flow cytometry in exponentially growing, single cells. We found no major variation in global translation rates through the cell cycle in either fission yeast or mammalian cells. We also measured phosphorylation of eukaryotic initiation factor-2α, an event that is thought to downregulate global translation in mitosis. In contrast with the prevailing view, eIF2α phosphorylation correlated poorly with downregulation of global translation and ectopically induced eIF2α phosphorylation inhibited global translation only at high levels.

    Original languageEnglish (US)
    Article numberjcs220327
    JournalJournal of cell science
    Volume131
    Issue number17
    DOIs
    StatePublished - Sep 1 2018

    Keywords

    • Cell cycle
    • EIF2α phosphorylation
    • Translation

    ASJC Scopus subject areas

    • Cell Biology

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