Identification and functional characterization of FMN2, a regulator of the cyclin-dependent kinase inhibitor p21.
Mol Cell
; 49(5): 922-33, 2013 Mar 07.
Article
en En
| MEDLINE
| ID: mdl-23375502
ABSTRACT
The ARF tumor suppressor is a central component of the cellular defense against oncogene activation in mammals. p14ARF activates p53 by binding and inhibiting HDM2, resulting, inter alia, in increased transcription and expression of the cyclin-dependent kinase inhibitor p21 and consequent cell-cycle arrest. We analyzed the effect of p14ARF induction on nucleolar protein dynamics using SILAC mass spectrometry and have identified the human Formin-2 (FMN2) protein as a component of the p14ARF tumor suppressor pathway. We show that FMN2 is increased upon p14ARF induction at both the mRNA and the protein level via a NF-κB-dependent mechanism that is independent of p53. FMN2 enhances expression of the cell-cycle inhibitor p21 by preventing its degradation. FMN2 is also induced by activation of other oncogenes, hypoxia, and DNA damage. These results identify FMN2 as a crucial component in the regulation of p21 and consequent oncogene/stress-induced cell-cycle arrest in human cells.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Inhibidor p21 de las Quinasas Dependientes de la Ciclina
/
Proteínas del Tejido Nervioso
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Humans
Idioma:
En
Año:
2013
Tipo del documento:
Article