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Cell Cycle
Article
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Cell Cycle
Article . 2011 . Peer-reviewed
Data sources: Crossref
Cell Cycle
Article . 2011
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Give me a break, but not in mitosis

The mitotic DNA damage response marks DNA double-strand breaks with early signaling events
Authors: Giunta S.; Jackson S. P.;
Abstract

: DNA double-strand breaks (DSBs) are extremely cytotoxic with a single unrepaired DSB being sufficient to induce cell death. A complex signalling cascade, termed the DNA damage response (DDR), is in place to deal with such DNA lesions and maintain genome stability. Recent work by us and others has found that the signalling cascade activated by DSBs in mitosis is truncated, displaying apical, but not downstream, components of the DDR. The E3 Ubiquitin ligases RNF8, RNF168 and BRCA1, along with the DDR mediator 53BP1, are not recruited to DSB sites in mitosis, and activation of downstream checkpoint kinases is also impaired. Here, we show that RNF8 and RNF168 are recruited to DNA damage foci in late mitosis, presumably to prime sites for 53BP1 recruitment in early G1. Interestingly, we show that, although RNF8, RNF168 and 53BP1 are excluded from DSB sites during most of mitosis, they associate with mitotic structures such as the kinetochore, suggesting roles for these DDR factors during mitotic cell division. We discuss these and other recent findings and suggest how these novel data collectively contribute to our understanding of mitosis and how cells deal with DNA damage during this crucial cell cycle stage.

Keywords

DNA Repair, BRCA1 Protein, Ubiquitin-Protein Ligases, Intracellular Signaling Peptides and Proteins, Ubiquitination, Mitosis, Cell Cycle Proteins, DNA, Genomic Instability, DNA-Binding Proteins, Gene Expression Regulation, Cell Line, Tumor, Humans, DNA Breaks, Double-Stranded, Female, Kinetochores, Tumor Suppressor p53-Binding Protein 1, Chromatin; Dna damage response; Dna double-strand breaks; mitosis; Signaling cascade; BRCA1 Protein; cell cycle proteins; cell line, tumor; DNA; DNA breaks, double-stranded; DNA Repair; DNA-binding proteins; female; gene expression regulation; genomiciInstability; humans; intracellular signalling peptides and proteins; kinetochores; mitosis; signal transduction; tumor suppressor p53-binding protein 1; ubiquitin-protein Llgases; ubiquitination, Signal Transduction

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    53
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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
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    Top 10%
    impulse
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    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
53
Top 10%
Top 10%
Top 10%
bronze