Genotoxic stress/p53-induced DNAJB9 inhibits the pro-apoptotic function of p53.
Cell Death Differ
; 22(1): 86-95, 2015 Jan.
Article
em En
| MEDLINE
| ID: mdl-25146923
ABSTRACT
DNAJB9 is a recently isolated member of the molecular chaperone gene family, whose precise function is largely unknown. In the present study, we have identified DNAJB9 as an inducible gene of the tumor suppressor p53. DNAJB9 expression was induced by p53 or genotoxic stress in a p53-dependent manner, which was mediated by the Ras/Raf/ERK pathway. In addition, depletion of DNAJB9 by using siRNAs greatly increased genotoxic stress/p53-induced apoptosis, suggesting that DNAJB9 inhibits the pro-apoptotic function of p53. We also found that DNAJB9 physically interacts with p53 through its J domain, through which it inhibits the pro-apoptotic function of p53. Moreover, DNAJB9 colocalized with p53 in both cytoplasm and nucleus under genotoxic conditions. Together, these results demonstrate that DNAJB9 is a downstream target of p53 that belongs to the group of negative feedback regulators of p53.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Dano ao DNA
/
Proteína Supressora de Tumor p53
/
Apoptose
/
Chaperonas Moleculares
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Sistema de Sinalização das MAP Quinases
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Proteínas de Choque Térmico HSP40
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Proteínas de Membrana
Limite:
Animals
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Humans
Idioma:
En
Revista:
Cell Death Differ
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Coréia do Sul