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- W1917567540 endingPage "2006" @default.
- W1917567540 startingPage "1999" @default.
- W1917567540 abstract "The genomic coding sequence of the large T antigen of simian virus 40 (SV40) was cloned into an Escherichia coli expression vector by joining new restriction sites, BglII and BamHI, introduced at the intron boundaries of the gene. Full-length large T antigen, as well as deletion and amino acid substitution mutants, were inducibly expressed from the lac promoter of pUC9, albeit with different efficiencies and protein stabilities. Specific interaction with SV40 origin DNA was detected for full-length T antigen and certain mutants. Deletion mutants lacking T-antigen residues 1 to 130 and 260 to 708 retained specific origin-binding activity, demonstrating that the region between residues 131 and 259 must carry the essential binding domain for DNA-binding sites I and II. A sequence between residues 302 and 320 homologous to a metal-binding finger motif is therefore not required for origin-specific binding. However, substitution of serine for either of two cysteine residues in this motif caused a dramatic decrease in origin DNA-binding activity. This region, as well as other regions of the full-length protein, may thus be involved in stabilizing the DNA-binding domain and altering its preference for binding to site I or site II DNA." @default.
- W1917567540 created "2016-06-24" @default.
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- W1917567540 date "1988-06-01" @default.
- W1917567540 modified "2023-09-27" @default.
- W1917567540 title "Expression of simian virus 40 T antigen in Escherichia coli: localization of T-antigen origin DNA-binding domain to within 129 amino acids" @default.
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- W1917567540 doi "https://doi.org/10.1128/jvi.62.6.1999-2006.1988" @default.
- W1917567540 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/253284" @default.
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