Interaction of p53 with the CCT complex promotes protein folding and wild-type p53 activity.
Mol Cell
; 50(6): 805-17, 2013 Jun 27.
Article
en En
| MEDLINE
| ID: mdl-23747015
ABSTRACT
p53 is a transcription factor that mediates tumor suppressor responses. Correct folding of the p53 protein is essential for these activities, and point mutations that induce conformational instability of p53 are frequently found in cancers. These mutant p53s not only lose wild-type activity but can also acquire the ability to promote invasion and metastasis. We show that folding of wild-type p53 is promoted by an interaction with the chaperonin CCT. Depletion of this chaperone in cells results in the accumulation of misfolded p53, leading to a reduction in p53-dependent gene expression. Intriguingly, p53 proteins mutated to prevent the interaction with CCT show conformational instability and acquire an ability to promote invasion and random motility that is similar to the activity of tumor-derived p53 mutants. Our data therefore suggest that both growth suppression and cell invasion may be differentially regulated functions of wild-type p53.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Proteína p53 Supresora de Tumor
/
Pliegue de Proteína
/
Chaperoninas del Grupo II
Límite:
Humans
Idioma:
En
Revista:
Mol Cell
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2013
Tipo del documento:
Article
País de afiliación:
Reino Unido