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J. Bacteriol., 10 1995, 5473-5479, Vol 177, No. 19
Copyright © 1995, American Society for Microbiology

Motility and thermotactic responses of Thermotoga maritima

MF Gluch, D Typke and W Baumeister
Max-Planck Institute for Biochemistry, Martinsried, Germany.

Thermotoga maritima, a thermophilic eubacterium, is motile at temperatures ranging from 50 to 105 degrees C. The cells are propelled by a single flagellum which most of the time spins clockwise. Changes in the swimming direction ("tumbles") are achieved by short reversals of the direction of filament rotation. The average speed of swimming cells depends on the temperature, reaching a maximum value of about 60 microns/s at 85 degrees C. The cells show a thermotactic response to temporal temperature changes. When the temperature is raised, the rate of tumbles is increased, while decreasing temperature decreases the tumbling rate.

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