Journal of Zhejiang University-SCIENCE B

, Volume 20, Issue 6, pp 457–466 | Cite as

p53 and its isoforms in DNA double-stranded break repair

  • Yu-xi Zhang
  • Wen-ya Pan
  • Jun ChenEmail author


DNA double-stranded break (DSB) is one of the most catastrophic damages of genotoxic insult. Inappropriate repair of DNA DSBs results in the loss of genetic information, mutation, and the generation of harmful genomic rearrangements, which predisposes an organism to immunodeficiency, neurological damage, and cancer. The tumor repressor p53 plays a key role in DNA damage response, and has been found to be mutated in 50% of human cancer. p53, p63, and p73 are three members of the p53 gene family. Recent discoveries have shown that human p53 gene encodes at least 12 isoforms. Different p53 members and isoforms play various roles in orchestrating DNA damage response to maintain genomic integrity. This review briefly explores the functions of p53 and its isoforms in DNA DSB repair.

Key words

p53 p53 isoform DNA double-stranded break repair Cell death 

p53 及其异构体在DNA 双链断裂修复中的作用


DNA双链断裂是DNA损伤最严重的形式。如果 DNA断裂不能正确修复,将会导致遗传物质的丢 失、基因突变和染色体重排。这不仅会影响正常 的发育和衰老过程,而且更严重的是基因组的不 完整会导致人类容易患上免疫缺陷、神经系统紊 乱和癌症等疾病。抑癌基因p53在DNA损伤反应 中扮演着一个中心角色,超过50%以上的人类癌 细胞中p53发生了变异。p53家族包括p53、p63 和p73三个成员。近年来研究发现:人的p53基因 最少编码12个异构体,这些异构体在DNA损伤反 应中起着不同作用,并协同p53一起维持基因组 DNA的完整性。本综述将探讨p53及其异构体在 DNA双链断裂修复中的作用。


p53 p53 异构体 DNA 双链断裂修复 细胞死亡 

CLC number



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Copyright information

© Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.MOE Key Laboratory of Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, College of Life SciencesZhejiang UniversityHangzhouChina

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