Meth A fibrosarcoma cells express two transforming mutant p53 species.
Oncogene
; 3(3): 313-21, 1988 Sep.
Article
en En
| MEDLINE
| ID: mdl-3060794
ABSTRACT
Expression plasmids directing the synthesis of various forms of the p53 cellular tumor antigen were compared with respect to their biological activities. All plasmids encoding wild type p53, derived from two different cDNA libraries, had absolutely no detectable activity when assayed for transformation of primary rat embryo fibroblasts in collaboration with Ha-ras. In contrast, p53 variants carrying point mutations in the protein coding region exhibited at least some transforming activity. Most notably, this was true for both types of mutant p53 cDNA clones isolated from Meth A cells. The data indicate that these cells, derived from a chemically-induced tumor, carry two independently mutated p53 alleles, each encoding a transformationally activated protein. This may imply that the mutations in the p53 gene played a role in the development of the Meth A tumor. Finally, cells overexpressing a transfected mutant p53 exhibit a physical complex between this exogenous p53 and its endogenous counterpart, possibly resulting in the stabilization of the latter.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Fosfoproteínas
/
Sarcoma Experimental
/
Transformación Celular Neoplásica
/
Proteínas de Neoplasias
Límite:
Animals
Idioma:
En
Revista:
Oncogene
Asunto de la revista:
BIOLOGIA MOLECULAR
/
NEOPLASIAS
Año:
1988
Tipo del documento:
Article
País de afiliación:
Israel