Tag: SV40
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Human cells contain a DNA-activated protein kinase that phosphorylates simian virus 40 T antigen, mouse p53, and the human Ku autoantigen
Abstract HeLa cells contain a serine/threonine protein kinase (DNA-PK) that is strongly activated in vitro by low concentrations of double-stranded DNA (dsDNA). Activation was specific for dsDNA; both natural DNAs and synthetic oligonucleotides functioned as kinase activators. The fact that DNA-PK activity was rapidly inhibited by incubation with dsDNA and ATP suggests that DNA-PK activity…
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Fischer-Fantuzzi L, Vesco C. Deletion of 43 amino acids in the NH2-terminal half of the large tumor antigen of simian virus 40 results in a non-karyophilic protein capable of transforming established cells. Proc Natl Acad Sci U S A. 1985
Abstract We have characterized a simian virus 40 (SV40) mutant, derived from the viral DNA insertion present in simian cell transformants, which carries a deletion affecting the NH2-terminal region of the SV40 large tumor antigen. This mutant protein is 6% smaller than normal, has lost the typical nuclear localization of the SV40 large tumor antigen,…
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