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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1980 Nov;77(11):6381–6385. doi: 10.1073/pnas.77.11.6381

In vitro comparison of initiation properties of bacteriophage lambda wild-type PR and x3 mutant promoters.

D K Hawley, W R McClure
PMCID: PMC350288  PMID: 6450417

Abstract

The in vitro initiation properties of the PR promoter of bacteriophage lambda and of a PR mutant, x3, were compared. Using the abortive initiation reaction, we measured the lags in the approach to a final steady-state rate when dinucleotide synthesis was initiated with RNA polymerase. These lags corresponded to the average times required for the formation of transcriptionally active open complexes. By measuring the lags at different RNA polymerase concentrations, we could separate open complex formation into two steps, based on a simple model in which the initial bimolecular association of free promoter and polymerase in a closed complex is followed by an isomerization to the open complex. The contribution of each step to the overall rate of open complex formation was quantitated for both promoters. We found that the x3 mutation, which is located in the -35 region of PR, resulted in a decrease in the association constant for the initial binding to the closed complex to 5% of its wild-type value and a decrease in the rate of the isomerization to 20%. The lifetimes and abortive initiation characteristics of the mutant and wild-type promoters were similar. We concluded that the main effect of the x3 mutation was to increase the average time of open complex formation and that the functional properties of the open complexes did not differ significantly between the two promoters.

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Selected References

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

  1. Burgess R. R., Jendrisak J. J. A procedure for the rapid, large-scall purification of Escherichia coli DNA-dependent RNA polymerase involving Polymin P precipitation and DNA-cellulose chromatography. Biochemistry. 1975 Oct 21;14(21):4634–4638. doi: 10.1021/bi00692a011. [DOI] [PubMed] [Google Scholar]
  2. Cech C. L., McClure W. R. Characterization of ribonucleic acid polymerase-T7 promoter binary complexes. Biochemistry. 1980 May 27;19(11):2440–2447. doi: 10.1021/bi00552a023. [DOI] [PubMed] [Google Scholar]
  3. Chamberlin M. J. The selectivity of transcription. Annu Rev Biochem. 1974;43(0):721–775. doi: 10.1146/annurev.bi.43.070174.003445. [DOI] [PubMed] [Google Scholar]
  4. Heyden B., Nüsslein C., Schaller H. Initiation of transcription within an RNA-polymerase binding site. Eur J Biochem. 1975 Jun 16;55(1):147–155. doi: 10.1111/j.1432-1033.1975.tb02147.x. [DOI] [PubMed] [Google Scholar]
  5. Lowe P. A., Hager D. A., Burgess R. R. Purification and properties of the sigma subunit of Escherichia coli DNA-dependent RNA polymerase. Biochemistry. 1979 Apr 3;18(7):1344–1352. doi: 10.1021/bi00574a034. [DOI] [PubMed] [Google Scholar]
  6. Maurer R., Maniatis T., Ptashne M. Promoters are in the operators in phage lambda. Nature. 1974 May 17;249(454):221–223. doi: 10.1038/249221a0. [DOI] [PubMed] [Google Scholar]
  7. McClure W. R., Cech C. L., Johnston D. E. A steady state assay for the RNA polymerase initiation reaction. J Biol Chem. 1978 Dec 25;253(24):8941–8948. [PubMed] [Google Scholar]
  8. McClure W. R. Rate-limiting steps in RNA chain initiation. Proc Natl Acad Sci U S A. 1980 Oct;77(10):5634–5638. doi: 10.1073/pnas.77.10.5634. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Nierman W. C., Chamberlin M. J. Studies of RNA chain initiation by Escherichia coli RNA polymerase bound to T7 DNA. Direct analysis of the kinetics and extent of RNA chain initiation at T7 promoter A1. J Biol Chem. 1979 Aug 25;254(16):7921–7926. [PubMed] [Google Scholar]
  10. Pfeffer S. R., Stahl S. J., Chamberlin M. J. Binding of Escherichia coli RNA polymerase to T7 DNA. Displacement of holoenzyme from promoter complexes by heparin. J Biol Chem. 1977 Aug 10;252(15):5403–5407. [PubMed] [Google Scholar]
  11. Pribnow D. Bacteriophage T7 early promoters: nucleotide sequences of two RNA polymerase binding sites. J Mol Biol. 1975 Dec 15;99(3):419–443. doi: 10.1016/s0022-2836(75)80136-7. [DOI] [PubMed] [Google Scholar]
  12. Pribnow D. Nucleotide sequence of an RNA polymerase binding site at an early T7 promoter. Proc Natl Acad Sci U S A. 1975 Mar;72(3):784–788. doi: 10.1073/pnas.72.3.784. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Rosenberg M., Court D. Regulatory sequences involved in the promotion and termination of RNA transcription. Annu Rev Genet. 1979;13:319–353. doi: 10.1146/annurev.ge.13.120179.001535. [DOI] [PubMed] [Google Scholar]
  14. Rubin G. M. The nucleotide sequence of Saccharomyces cerevisiae 5.8 S ribosomal ribonucleic acid. J Biol Chem. 1973 Jun 10;248(11):3860–3875. [PubMed] [Google Scholar]
  15. Schaller H., Gray C., Herrmann K. Nucleotide sequence of an RNA polymerase binding site from the DNA of bacteriophage fd. Proc Natl Acad Sci U S A. 1975 Feb;72(2):737–741. doi: 10.1073/pnas.72.2.737. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Siebenlist U. RNA polymerase unwinds an 11-base pair segment of a phage T7 promoter. Nature. 1979 Jun 14;279(5714):651–652. doi: 10.1038/279651a0. [DOI] [PubMed] [Google Scholar]
  17. Siebenlist U., Simpson R. B., Gilbert W. E. coli RNA polymerase interacts homologously with two different promoters. Cell. 1980 Jun;20(2):269–281. doi: 10.1016/0092-8674(80)90613-3. [DOI] [PubMed] [Google Scholar]
  18. WILKINSON G. N. Statistical estimations in enzyme kinetics. Biochem J. 1961 Aug;80:324–332. doi: 10.1042/bj0800324. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Walter G., Zillig W., Palm P., Fuchs E. Initiation of DNA-dependent RNA synthesis and the effect of heparin on RNA polymerase. Eur J Biochem. 1967 Dec;3(2):194–201. doi: 10.1111/j.1432-1033.1967.tb19515.x. [DOI] [PubMed] [Google Scholar]
  20. Walz A., Pirrotta V. Sequence of the PR promoter of phage lambda. Nature. 1975 Mar 13;254(5496):118–121. doi: 10.1038/254118a0. [DOI] [PubMed] [Google Scholar]

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