Skip to main content
Nucleic Acids Research logoLink to Nucleic Acids Research
. 1985 Jul 25;13(14):5019–5026. doi: 10.1093/nar/13.14.5019

Altered DNA contacts made by a mutant AraC protein.

A Brunelle, W Hendrickson, R Schleif
PMCID: PMC321846  PMID: 3895160

Abstract

Mutant AraC proteins were selected for their ability to induce but not to repress, or their ability to repress but not to induce the araBAD operon. One such unusual mutant is able to bind to the araI site with an affinity only two to three-fold weaker than the wild type AraC protein, but the mutant protein was shown, both in crude extracts and when purified, to contact only two of the three major groove regions of the DNA that are contacted by the wild type protein.

Full text

PDF
5021

Images in this article

Selected References

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

  1. Anderson W. F., Ohlendorf D. H., Takeda Y., Matthews B. W. Structure of the cro repressor from bacteriophage lambda and its interaction with DNA. Nature. 1981 Apr 30;290(5809):754–758. doi: 10.1038/290754a0. [DOI] [PubMed] [Google Scholar]
  2. Busby S., Irani M., Crombrugghe B. Isolation of mutant promoters in the Escherichia coli galactose operon using local mutagenesis on cloned DNA fragments. J Mol Biol. 1982 Jan 15;154(2):197–209. doi: 10.1016/0022-2836(82)90060-2. [DOI] [PubMed] [Google Scholar]
  3. ENGLESBERG E., ANDERSON R. L., WEINBERG R., LEE N., HOFFEE P., HUTTENHAUER G., BOYER H. L-Arabinose-sensitive, L-ribulose 5-phosphate 4-epimerase-deficient mutants of Escherichia coli. J Bacteriol. 1962 Jul;84:137–146. doi: 10.1128/jb.84.1.137-146.1962. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Englesberg E., Squires C., Meronk F., Jr The L-arabinose operon in Escherichia coli B-r: a genetic demonstration of two functional states of the product of a regulator gene. Proc Natl Acad Sci U S A. 1969 Apr;62(4):1100–1107. doi: 10.1073/pnas.62.4.1100. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Fried M. G., Crothers D. M. CAP and RNA polymerase interactions with the lac promoter: binding stoichiometry and long range effects. Nucleic Acids Res. 1983 Jan 11;11(1):141–158. doi: 10.1093/nar/11.1.141. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Fried M., Crothers D. M. Equilibria and kinetics of lac repressor-operator interactions by polyacrylamide gel electrophoresis. Nucleic Acids Res. 1981 Dec 11;9(23):6505–6525. doi: 10.1093/nar/9.23.6505. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Garner M. M., Revzin A. A gel electrophoresis method for quantifying the binding of proteins to specific DNA regions: application to components of the Escherichia coli lactose operon regulatory system. Nucleic Acids Res. 1981 Jul 10;9(13):3047–3060. doi: 10.1093/nar/9.13.3047. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Greenblatt J., Schleif R. Arabinose C protein: regulation of the arabinose operon in vitro. Nat New Biol. 1971 Oct 6;233(40):166–170. doi: 10.1038/newbio233166a0. [DOI] [PubMed] [Google Scholar]
  9. Hendrickson W., Schleif R. F. Regulation of the Escherichia coli L-arabinose operon studied by gel electrophoresis DNA binding assay. J Mol Biol. 1984 Sep 25;178(3):611–628. doi: 10.1016/0022-2836(84)90241-9. [DOI] [PubMed] [Google Scholar]
  10. Hendrickson W., Schleif R. A dimer of AraC protein contacts three adjacent major groove regions of the araI DNA site. Proc Natl Acad Sci U S A. 1985 May;82(10):3129–3133. doi: 10.1073/pnas.82.10.3129. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. McKay D. B., Steitz T. A. Structure of catabolite gene activator protein at 2.9 A resolution suggests binding to left-handed B-DNA. Nature. 1981 Apr 30;290(5809):744–749. doi: 10.1038/290744a0. [DOI] [PubMed] [Google Scholar]
  12. Pabo C. O., Lewis M. The operator-binding domain of lambda repressor: structure and DNA recognition. Nature. 1982 Jul 29;298(5873):443–447. doi: 10.1038/298443a0. [DOI] [PubMed] [Google Scholar]
  13. Pabo C. O., Sauer R. T. Protein-DNA recognition. Annu Rev Biochem. 1984;53:293–321. doi: 10.1146/annurev.bi.53.070184.001453. [DOI] [PubMed] [Google Scholar]
  14. Schleif R. F., Favreau M. A. Hyperproduction of araC protein from Escherichia coli. Biochemistry. 1982 Feb 16;21(4):778–782. doi: 10.1021/bi00533a031. [DOI] [PubMed] [Google Scholar]
  15. Sheppard D. E., Englesberg E. Further evidence for positive control of the L-arabinose system by gene araC. J Mol Biol. 1967 May 14;25(3):443–454. doi: 10.1016/0022-2836(67)90197-0. [DOI] [PubMed] [Google Scholar]
  16. Wilcox G., Meuris P., Bass R., Englesberg E. Regulation of the L-arabinose operon BAD in vitro. J Biol Chem. 1974 May 10;249(9):2946–2952. [PubMed] [Google Scholar]

Articles from Nucleic Acids Research are provided here courtesy of Oxford University Press

RESOURCES