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The bacterial flagellar motor.

D F Blair1

  • 1Department of Cellular and Developmental Biology, Harvard University, Cambridge, MA 02138.

Seminars in Cell Biology
|April 1, 1990
PubMed
Summary
This summary is machine-generated.

The bacterial flagellar motor uses chemical energy for movement. Recent studies reveal rapid rotation in swimming cells and propose a protein-based mechanism for torque generation.

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Area of Science:

  • Microbiology and Molecular Biology
  • Biophysics

Background:

  • The bacterial flagellar motor is a complex molecular machine.
  • It converts chemical energy into mechanical work for motility.
  • Understanding its structure, genetics, and dynamics is crucial.

Purpose of the Study:

  • To review recent advances in bacterial flagellar motor research.
  • To emphasize the dynamics of flagellar rotation.
  • To present a hypothesis for torque generation.

Main Methods:

  • Review of existing literature.
  • Contrast of data from tethered and swimming cells.
  • Analysis of genetic evidence for protein function.

Main Results:

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  • Flagellar motors in swimming cells rotate much faster than previously observed in tethered cells.
  • A core set of proteins has been identified as directly involved in torque generation.
  • A detailed hypothesis for the mechanism of torque generation is proposed.

    • Conclusions:

    • The bacterial flagellar motor's dynamics are better understood through studies of swimming cells.
    • Specific proteins play key roles in generating the motor's torque.
    • Further research can elucidate the precise functions of these proteins in motility.