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Journal of Bacteriology, August 2006, p. 5646-5649, Vol. 188, No. 15
0021-9193/06/$08.00+0     doi:10.1128/JB.00497-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Similarities and Differences in Interactions of the Activity-Enhancing Chemoreceptor Pentapeptide with the Two Enzymes of Adaptational Modification

Wing-Cheung Lai, Ludmila A. Barnakova,{dagger} Alexander N. Barnakov,{dagger} and Gerald L. Hazelbauer*

Department of Biochemistry, 117 Schweitzer Hall, University of Missouri-Columbia, Columbia, Missouri 65211

Received 7 April 2006/ Accepted 22 May 2006

Sensory adaptation and chemotaxis by Escherichia coli require a specific pentapeptide at the chemoreceptor carboxyl terminus. This sequence binds the two enzymes of receptor adaptational modification, enhancing catalysis, but with different binding features and mechanisms. We investigated the relative importance of each pentapeptide side chain for the two enhancing interactions.

* Corresponding author. Mailing address: Department of Biochemistry, 117 Schweitzer Hall, University of Missouri-Columbia, Columbia, MO 65211. Phone: (573) 882-4845. Fax: (573) 882-5635. E-mail: hazelbauerg{at}missouri.edu.

{dagger} Present address: Johnson & Johnson Pharmaceutical Research and Development, L.L.C., Eagleview Corporate Center, 665 Stockton Drive, Exton PA 19341.

Journal of Bacteriology, August 2006, p. 5646-5649, Vol. 188, No. 15
0021-9193/06/$08.00+0     doi:10.1128/JB.00497-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.





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