Blog
About

8
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Resisting arrest: recovery from checkpoint arrest through dephosphorylation of Chk1 by PP1.

      Cell Cycle

      metabolism, 14-3-3 Proteins, Cell Cycle, physiology, Cell Cycle Proteins, Checkpoint Kinase 2, DNA Damage, Genes, cdc, Humans, Nuclear Proteins, Phosphoprotein Phosphatases, Phosphorylation, Protein Kinases, Schizosaccharomyces, genetics, Schizosaccharomyces pombe Proteins, Signal Transduction, Tyrosine 3-Monooxygenase

      Read this article at

      ScienceOpenPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The G2 DNA damage checkpoint prevents mitotic entry in the presence of damaged DNA, and thus is essential for cells to replicate with stable genetic inheritance. Whilst significant progress has been made in the past 10 years on the mechanism of checkpoint activation, little attention has been paid to how the DNA damage checkpoint is switched off to allow cell cycle re-entry. Insight into the mechanism of cell cycle re-entry was recently provided by our finding that the Schizosaccharomyces pombe type 1 phosphatase (PP1) Dis2 dephosphorylates the checkpoint effector kinase Chk1. This occurs on a site phosphorylated by the ATR homologue Rad3 in response to DNA damage, and results in Chk1 inactivation and checkpoint release. Here we discuss the implications of this finding on DNA damage checkpoint signaling, and speculate on models for checkpoint maintenance and release.

          Related collections

          Author and article information

          Journal
          15020842

          Comments

          Comment on this article