The Methyltransferase Set7/9 (Setd7) Is Dispensable for the p53-Mediated DNA Damage Response In Vivo

被引:70
作者
Campaner, Stefano [1 ]
Spreafico, Fabio [1 ]
Burgold, Thomas [1 ]
Doni, Mirko [1 ]
Rosato, Umberto [1 ]
Amati, Bruno [1 ,2 ]
Testa, Giuseppe [1 ]
机构
[1] European Inst Oncol, Dept Expt Oncol, I-20139 Milan, Italy
[2] Ist Italiano Tecnol, Ctr Genom Sci IIT SEMM, I-20139 Milan, Italy
关键词
TUMOR SUPPRESSION; P53; ACTIVITY; METHYLATION; TRANSCRIPTION; ACETYLATION; APOPTOSIS; COMPLEX;
D O I
10.1016/j.molcel.2011.08.007
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
p53 is the central regulator of cell fate following genotoxic stress and oncogene activation. Its activity is controlled by several posttranslational modifications. Originally defined as a critical layer of p53 regulation in human cell lines, p53 lysine methylation by Set7/9 (also called Setd7) was proposed to fulfill a similar function in vivo in the mouse, promoting p53 acetylation, stabilization, and activation upon DNA damage (Kurash et al., 2008). We tested the physiological relevance of this circuit in an independent Set7/9 knockout mouse strain. Deletion of Set7/9 had no effect on p53-dependent cell-cycle arrest or apoptosis following sublethal or lethal DNA damage induced by radiation or genotoxic agents. Set7/9 was also dispensable for p53 acetylation following irradiation. c-myc oncogene-induced apoptosis was also independent of Set7/9, and analysis of p53 target genes showed that Set7/9 is not required for the p53-dependent gene expression program. Our data indicate that Set7/9 is dispensable for p53 function in the mouse.
引用
收藏
页码:681 / 688
页数:8
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