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               ·118 ·                            南 京    医 科 大 学 学         报                        2023年1月


              对 NHEJ 修复途径的重要调节因子,其在染色质中                             (7456):50-54
              的募集成为当前的研究热点。多项研究证实53BP1                          [9] LU X,TANG M,ZHU Q,et al. GLP⁃catalyzed H4K16me1
              与染色质的结合主要受组蛋白修饰的调节,凸显了                                 promotes 53BP1 recruitment to permit DNA damage re⁃
              进一步研究组蛋白与53BP1作用机制的重要性。现                               pair and cell survival[J]. Nucleic Acids Res,2019,47
                                                                    (21):10977-10993
              有的研究大多关注修复调节因子对53BP1募集的影
                                                                [10] SENGUPTA A,HALDAR D. Human sirtuin 3(SIRT3)
              响。然而,组蛋白修饰在 53BP1 募集中发挥的作用
                                                                     deacetylates histone H3 lysine 56 to promote nonhomolo⁃
              也同样值得关注与进一步探索。本文综述了53BP1
                                                                     gous end joining repair[J]. DNA Repair,2018,61:1-16
              结 构 、53BP1 募 集 分 子 机 制 以 及 组 蛋 白 修 饰 在
                                                                [11] VAZQUEZ B N,THACKRAY J K,SIMONET N G,et al.
              53BP1 募集中的作用机制,但仍有许多问题和重要                              SIRT7 mediates L1 elements transcriptional repression
              的研究方向需要继续探索。组蛋白 H3K18、H3K56                            and their association with the nuclear lamina[J]. Nucleic
              如何与53BP1相互作用以及它们是否影响53BP1识                             Acids Res,2019,47(15):7870-7885
              别 K2AK15ub、H4K20me2,尚有待深入研究。随着                    [12] CALLEN E,ZONG D,WU W,et al. 53BP1 enforces dis⁃
              组蛋白修饰与 53BP1 募集的深度开发,可为癌症治                             tinct pre⁃and post⁃resection blocks on homologous recom⁃
              疗提供更多选择。                                               bination[J]. Mol Cell,2020,77(1):26-38
                                                                [13]OTSUKA K,TOMITA M. Concurrent live imaging of DNA
             [参考文献]
                                                                     double⁃strand break repair and cell⁃cycle progression by
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