Journal of Bacteriology, January 2008, p. 428-433, Vol. 190, No. 1
0021-9193/08/$08.00+0 doi:10.1128/JB.01431-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.
Substitutions at Auxiliary Operator O3 Enhance Repression by Nitrate-Responsive Regulator NarL at Synthetic lac Control Regions in Escherichia coli K-12
Valley Stewart* and
Peggy J. Bledsoe
Section of Microbiology, University of California, Davis, California 95616-8665
Received 4 September 2007/
Accepted 14 October 2007
We constructed monocopy lac operon control regions in which the operators O1-lac and O3-lac were replaced by NarL and NarP binding sites from the nirB or napF operon control regions. The results support the hypothesis that DNA-bound dimers of phospho-NarL can participate in higher-order cooperative interactions.
* Corresponding author. Mailing address: Section of Microbiology, University of California, One Shields Avenue, Davis CA 95616-8665. Phone: (530) 754-7994. Fax: (530) 752-9014. E-mail: vjstewart{at}ucdavis.edu
Published ahead of print on 26 October 2007.
Journal of Bacteriology, January 2008, p. 428-433, Vol. 190, No. 1
0021-9193/08/$08.00+0 doi:10.1128/JB.01431-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.
Copyright © 2008 by the American Society for Microbiology. All rights reserved.