SUMO-specific protease 2 in Mdm2-mediated regulation of p53.
SUMO-specific protease 2 in Mdm2-mediated regulation of p53.
复制标题
DOI:
10.1038/cdd.2010.168
复制
发表时间:
2011-06
影响因子:
12.4
通讯作者:
中科院分区:
文献类型:
--
作者:
Genetic analysis in mice has revealed a key genetic pathway, SENP2-Mdm2-p53, essential for trophoblast development. Targeted disruption of SENP2 impairs the G-S transition required for mitotic and endoreupliation cell cycles during expansion of trophoblast stem cells and their differentiation into polyploidy cells, respectively. The disruption disturbed the subcellular distribution and SUMO modification of Mdm2, leading to interference with p53 degradation. Here we further explore the mechanism underlying the SENP2 mediated regulation of Mdm2 in p53-induced cellular stress. We identify a specific isoform of SENP2 necessary and sufficient to negatively regulate the p53-dependent transcription and its related stress responses. This isoform-specific effect is attributed to the differential compartmentalization of SENP2. SUMO conjugation of Mdm2 induces its co-localization and association with SENP2 at the PML bodies. Biochemical studies show that SENP2 catalyzes the desumoylation process of Mdm2. The SENP2-dependent regulation of Mdm2 is sensitive to its p53-binding activity. Our findings lead us to propose a mechanism underlying the SENP2 mediated regulation of Mdm2 critical for genome integrity in p53-dependent stress responses.
登录
查看更多内容
影响因子:
7.3
作者:
Maruyama T;Mirando AJ;Deng CX;Hsu W
通讯作者:
Hsu W
影响因子:
39.2
作者:
LI, FP;FRAUMENI, JF
通讯作者:
FRAUMENI, JF
影响因子:
5.3
作者:
Lanni, JS;Jacks, T
通讯作者:
Jacks, T
影响因子:
11.4
作者:
Fogal, V;Gostissa, M;Del Sal, G
通讯作者:
Del Sal, G
影响因子:
64.8
作者:
Green, Douglas R.;Kroemer, Guido
通讯作者:
Kroemer, Guido