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. 1984 Dec;4(12):2631–2638. doi: 10.1128/mcb.4.12.2631

Sequence-specific binding of simian virus 40 A protein to nonorigin and cellular DNA.

P J Wright, A L DeLucia, P Tegtmeyer
PMCID: PMC369271  PMID: 6570189

Abstract

The simian virus 40 A protein (T antigen) recognized and bound to the consensus sequence 5'-GAGGC-3' in DNA from many sources. Sequence-specific binding to single pentanucleotides in randomly chosen DNA predominated over binding to nonspecific sequences. The asymmetric orientation of protein bound to nonorigin recognition sequences also resembled that of protein bound to the origin region of simian virus 40 DNA. Sequence variations in the DNA adjacent to single pentanucleotides influenced binding affinities even though methylation interference and protection studies did not reveal specific interactions outside of pentanucleotides. Thus, potential locations of A protein bound to any DNA can be predicted although the determinants of binding affinity are not yet understood. Sequence-specific binding of A protein to cellular DNA would provide a mechanism for specific alterations of host gene expression that facilitate viral function.

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Selected References

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