How cells ensure correct repair of DNA double-strand breaks

作者：Joonyoung Her, Samuel F. Bunting · 发表于：Journal of Biological Chemistry · 年份：2018 · DOI：10.1074/jbc.tm118.000371 · 被引用次数：325 · 研究领域：DNA Repair Mechanisms、Carcinogens and Genotoxicity Assessment、Cancer-related Molecular Pathways

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.