SV40 large T antigen targets multiple cellular pathways to elicit cellular transformation
نویسندگان
چکیده
منابع مشابه
SV40 large tumor antigen (T antigen): database of mutants
The SV40 T antigen database (http://www.pitt.edu/pipaslab/) lists viruses and plasmids expressing mutant forms of large T antigen. Each entry contains information regarding the mutant designation, mutant type, virus strain, nucleotide change, amino acid change and pertinent references. The database is now available as an internet searchable index.
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Abortive infection of BALB/c mouse embryo fibroblasts differing in p53 gene status (p53(+/+) versus p53(-/)(-)) with simian virus 40 (SV40) revealed a quantitatively and qualitatively decreased transformation efficiency in p53(-/-) cells compared to p53(+/+) cells, suggesting a supportive effect of wild-type (wt) p53 in the SV40 transformation process. SV40 transformation efficiency also was lo...
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Normal cells in culture generally senesce whereas tumor-derived cells are often, but not without exception, immortal and grow indefinitely. For cells to escape the senescence program, normal genes must be lost or inactivated as shown by somatic cell genetic studies. For example, the introduction of specific chromosomes by microcell-mediated chromosome transfer has been shown to induce senescenc...
متن کاملA novel role for RAX, the cellular activator of PKR, in synergistically stimulating SV40 large T antigen-dependent gene expression.
The double-stranded (ds) RNA-binding protein RAX was discovered as a stress-induced cellular activator of the dsRNA-dependent protein kinase (PKR), a key regulator of protein synthesis in response to viral infection and cellular stress. We now report a novel function of RAX, independent of PKR, to enhance SV40 promoter (origin)/enhancer-dependent gene expression. Several mammalian cell lines in...
متن کاملRegions of SV40 large T antigen necessary for oligomerization and complex formation with the cellular oncoprotein p53.
The simian virus 40 (SV40) T antigen is composed of 708 amino acids and forms monomers and various oligomers and, in small amounts, heterologous complexes with the cellular oncoprotein p53 (T-p53). Using SV40 mutants coding for T antigen fragments which are either deleted in the N-terminal half or truncated by various lengths at the C-terminal end, we found that a region between amino acids 114...
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ژورنال
عنوان ژورنال: Oncogene
سال: 2005
ISSN: 0950-9232,1476-5594
DOI: 10.1038/sj.onc.1209046