Functional analysis of the acetylation of human p53 in DNA damage responses.
Functional analysis of the acetylation of human p53 in DNA damage responses.
复制标题
DNA 损伤反应中人 p53 乙酰化的功能分析
DOI:
10.1007/s13238-014-0048-x
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发表时间:
2014-07
期刊:
影响因子:
21.1
通讯作者:
Fu, Xuemei
中科院分区:
文献类型:
--
作者:
Chung, Sun-Ku;Zhu, Shengyun;Xu, Yang;Fu, Xuemei
As a critical tumor suppressor, p53 is inactivated in human cancer cells by somatic gene mutation or disruption of pathways required for its activation. Therefore, it is critical to elucidate the mechanism underlying p53 activation after genotoxic and cellular stresses. Accumulating evidence has indicated the importance of posttranslational modifications such as acetylation in regulating p53 stability and activity. However, the physiological roles of the eight identified acetylation events in regulating p53 responses remain to be fully understood. By employing homologous recombination, we introduced various combinations of missense mutations (lysine to arginine) into eight acetylation sites of the endogenous p53 gene in human embryonic stem cells (hESCs). By determining the p53 responses to DNA damage in the p53 knock-in mutant hESCs and their derivatives, we demonstrate physiological importance of the acetylation events within the core domain (K120 and K164) and at the C-terminus (K370/372/373/381/382/386) in regulating human p53 responses to DNA damage.
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