MOF and histone H4 acetylation at lysine 16 are critical for DNA damage response and double-strand break repair

Girdhar G. Sharma, Sairei So, Arun Gupta, Rakesh Kumar, Christelle Cayrou, Nikita Avvakumov, Utpal Bhadra, Raj K. Pandita, Matthew H. Porteus, David J. Chen, Jacques Cote, Tej K. Pandita

Research output: Contribution to journalArticle

191 Scopus citations

Abstract

The human MOF gene encodes a protein that specifically acetylates histone H4 at lysine 16 (H4K16ac). Here we show that reduced levels of H4K16ac correlate with a defective DNA damage response (DDR) and double-strand break (DSB) repair to ionizing radiation (IR). The defect, however, is not due to altered expression of proteins involved in DDR. Abrogation of IR-induced DDR by MOF depletion is inhibited by blocking H4K16ac deacetylation. MOF was found to be associated with the DNA-dependent protein kinase catalytic subunit (DNA-PKcs), a protein involved in nonhomologous end-joining (NHEJ) repair. ATM-dependent IR-induced phosphorylation of DNA-PKcs was also abrogated in MOF-depleted cells. Our data indicate that MOF depletion greatly decreased DNA double-strand break repair by both NHEJ and homologous recombination (HR). In addition, MOF activity was associated with general chromatin upon DNA damage and colocalized with the synaptonemal complex in male meiocytes. We propose that MOF, through H4K16ac (histone code), has a critical role at multiple stages in the cellular DNA damage response and DSB repair.

Original languageEnglish (US)
Pages (from-to)3582-3595
Number of pages14
JournalMolecular and cellular biology
Volume30
Issue number14
DOIs
StatePublished - Jul 2010

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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    Sharma, G. G., So, S., Gupta, A., Kumar, R., Cayrou, C., Avvakumov, N., Bhadra, U., Pandita, R. K., Porteus, M. H., Chen, D. J., Cote, J., & Pandita, T. K. (2010). MOF and histone H4 acetylation at lysine 16 are critical for DNA damage response and double-strand break repair. Molecular and cellular biology, 30(14), 3582-3595. https://doi.org/10.1128/MCB.01476-09