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Related Experiment Videos

How is nitrogenase regulated by oxygen?

S Hill1

  • 1AFRC-IPSR Division of Nitrogen Fixation, University of Sussex, Brighton, U.K.

FEMS Microbiology Reviews
|April 1, 1988
PubMed
Summary

Oxygen

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Area of Science:

  • Microbiology
  • Biochemistry
  • Physiology

Background:

  • Diazotrophy, the biological conversion of atmospheric nitrogen to ammonia, is crucial for life.
  • Organisms performing diazotrophy often possess aerobic catabolism.
  • Oxygen's role in diazotrophy is complex, presenting both benefits and drawbacks.

Purpose of the Study:

  • To review the physiological aspects of oxygen's influence on diazotrophy.
  • To emphasize the mechanisms regulating nitrogenase synthesis in response to oxygen.

Main Methods:

  • Literature review of physiological and biochemical studies.
  • Analysis of oxygen regulation mechanisms for nitrogenase synthesis.

Main Results:

  • Oxygen supports ATP production, a substrate for nitrogenase.
  • Oxygen can inhibit nitrogenase activity and repress its synthesis.
  • Specific regulatory mechanisms for oxygen control of nitrogenase are highlighted.

Conclusions:

  • Oxygen's dual role in diazotrophy necessitates intricate regulatory mechanisms.
  • Understanding oxygen regulation is key to optimizing biological nitrogen fixation.

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