The corepressor silencing mediator for retinoid and thyroid hormone receptor facilitates cellular recovery from DNA double-strand breaks

Jiujiu Yu, Christine Palmer, Theresa Alenghat, Yun Li, Gary Kao, Mitchell A. Lazar

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Cells are frequently challenged by DNA double-strand breaks (DSB) that threaten their normal function and survival. In mammalian cells, the repair of DSBs is predominantly mediated by the DNA-dependent protein kinase (DNA-PK) complex. We unexpectedly found that the corepressor silencing mediator for retinoid and thyroid hormone receptor (SMRT) associates with the DNA-PK repair complex. The SMRT/histone deacetylase 3 complex is required for the transcriptional repressive property of the Ku70 subunit of the repair complex. Moreover, SMRT, but not the related Nuclear Receptor Corepressor, is required for cellular recovery from DNA DSBs induced by ionizing radiation or DNA damage-inducing drugs. Thus, the corepressor SMRT plays a novel and critical role in the cellular response to DSBs.

Original languageEnglish (US)
Pages (from-to)9316-9322
Number of pages7
JournalCancer Research
Volume66
Issue number18
DOIs
Publication statusPublished - Sep 15 2006

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ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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