Torque-generating units of the flagellar motor of Escherichia coli have a high duty ratio
Article Abstract:
Expression of protein MotA was induced in motA- cells under conditions of low viscous load. The limiting speed of the motor is shown to be independent of the number of units. It is likely that each unit may stay attached to the rotor during its mechanochemical cycle. Torque generators act more like kinesin than myosin.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Bacterial flagellar switching under load
Article Abstract:
The authors discuss the study of flagallated bacteria which can modulate rotation direction of their flagellar motors. The probability of the motor rotating in the clockwise direction increases under high load when the motor spins slowly.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
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Powering the flagellar motor of Escherichia coli with an external voltage source
Article Abstract:
Studies on the effect of proton leakage or mechanical nonlinearities on the efficiency of the rotary motors of the flagella of Escherichia coli show that torque is proportional to protonmotive force until -150 millivolts. Thus a definite number of protons work together to carry the motor through each revolution. When the cells protonmotive force is positive, torque-generating elements, which are most probably the motor proteins MotA and/or MotB, become inactive and can be re-activated by a negative protonmotive force.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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