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. 1979 Jul;76(7):3233–3237. doi: 10.1073/pnas.76.7.3233

Contacts between Escherichia coli RNA polymerase and thymines in the lac UV5 promoter.

R B Simpson
PMCID: PMC383798  PMID: 386333

Abstract

I have identified those 5 positions of thymines in the lac UV5 promoter that lie close to bound Escherichia coli RNA polymerase (nucleosidetriphosphate:RNA nucleotidyltransferase, EC 2.7.7.6). Although ultraviolet irradiation of DNA with 5-bromouracil substituted in place of thymine normally cleaves the DNA at the bromouracils, a protein bound to the DNA can perturb these cleavages at those locations at which the protein lies close to the bromine. In the lac promoter most of these contacts lie in three regions. Four contacts lie in the region where transcription initiates; four lie in the "Pribnow box," which is located about 10 base pairs upstream from the initiation site; and three more lie in the "-35 region," located about 35 base pairs upstream from the initiation site. The "Pribnow box" and the "-35 region" are regions whose sequences are partially conserved between promoters and in which most promoter mutations are located; thus, contacts in these two regions probably represent sites of sequence-specific recognition by RNA polymerase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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