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An RNA polymerase II-coupled function for histone H3K36 methylation in checkpoint activation and DSB repair

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  • Deepak Kumar Jha

    (School of Medicine)

  • Brian D. Strahl

    (School of Medicine
    Lineberger Comprehensive Cancer Center, School of Medicine)

Abstract

Histone modifications are major determinants of DNA double-strand break (DSB) response and repair. Here we elucidate a DSB repair function for transcription-coupled Set2 methylation at H3 lysine 36 (H3K36me). Cells devoid of Set2/H3K36me are hypersensitive to DNA-damaging agents and site-specific DSBs, fail to properly activate the DNA-damage checkpoint, and show genetic interactions with DSB-sensing and repair machinery. Set2/H3K36me3 is enriched at DSBs, and loss of Set2 results in altered chromatin architecture and inappropriate resection during G1 near break sites. Surprisingly, Set2 and RNA polymerase II are programmed for destruction after DSBs in a temporal manner—resulting in H3K36me3 to H3K36me2 transition that may be linked to DSB repair. Finally, we show a requirement of Set2 in DSB repair in transcription units—thus underscoring the importance of transcription-dependent H3K36me in DSB repair.

Suggested Citation

  • Deepak Kumar Jha & Brian D. Strahl, 2014. "An RNA polymerase II-coupled function for histone H3K36 methylation in checkpoint activation and DSB repair," Nature Communications, Nature, vol. 5(1), pages 1-13, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4965
    DOI: 10.1038/ncomms4965
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