Role of Methionine in Bacterial Chemotaxis
J Bacteriol. 1974 May;118(2):640–645. doi:
Role of Methionine in Bacterial Chemotaxis
Dana Aswad
1Department of Biochemistry, University of California, Berkeley, California 94720Find articles by
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D E Koshland Jr
1Department of Biochemistry, University of California, Berkeley, California 94720Find articles by
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1Department of Biochemistry, University of California, Berkeley, California 94720Copyright © 1974 American Society for Microbiology
PMCID: PMC246799 PMID:
Abstract
The effect of methionine starvation on the motility and behavior of normal and nonchemotactic mutants of Salmonella typhimurium was investigated. Methionine starvation eliminates tumbling in the wild type, but fails to do so in an uncoordinated (frequent tumbling) mutant. In the mutant, methionine starvation significantly extends the period of smooth motility that follows a sharp temporal increase of attractant. These results suggest that methionine metabolism is not tightly coupled to the generation of tumbles, but rather is necessary for the return of some tumble-regulating parameter to a steady-state level.
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