How cells ensure correct repair of DNA double-strand breaks

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Abstract

DNA double-strand breaks (DSBs) arise regularly in cells and when left unrepaired cause senescence or cell death. Homologous recombination (HR) and nonhomologous end-joining (NHEJ) are the two major DNA-repair pathways. Whereas HR allows faithful DSB repair and healthy cell growth, NHEJ has higher potential to contribute to mutations and malignancy. Many regulatory mechanisms influence which of these two pathways is used in DSB repair. These mechanisms depend on the cell cycle, post-translational modifications, and chromatin effects. Here, we summarize current research into these mechanisms, with a focus on mammalian cells, and also discuss repair by “alternative end-joining” and single-strand annealing.

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Her, J., & Bunting, S. F. (2018, July 6). How cells ensure correct repair of DNA double-strand breaks. Journal of Biological Chemistry. American Society for Biochemistry and Molecular Biology Inc. https://doi.org/10.1074/jbc.TM118.000371

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