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Nitrogenase and biological nitrogen fixation

J Kim1, D C Rees

  • 1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125.

Biochemistry
|January 18, 1994
PubMed
Summary
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Biological nitrogen fixation, essential for life, is performed by nitrogenase. Recent studies reveal the enzyme

Area of Science:

  • Biochemistry
  • Enzymology
  • Structural Biology

Background:

  • Biological nitrogen fixation converts atmospheric nitrogen into ammonia.
  • Nitrogenase, a metalloenzyme, catalyzes this vital process.
  • The enzyme comprises iron (Fe) protein and molybdenum-iron (MoFe) protein components.

Purpose of the Study:

  • To elucidate the molecular mechanisms of nitrogenase.
  • To provide a structural framework for understanding nitrogen fixation.

Main Methods:

  • Recent crystallographic analyses of Fe-protein and MoFe-protein.
  • Detailed examination of polypeptide folds and metal center organization.

Main Results:

  • Revealed detailed structures of Fe-protein and MoFe-protein.

Related Experiment Videos

  • Illustrated the organization of unusual metal centers within nitrogenase.
  • Provided insights into the spatial arrangement of redox centers.

    • Conclusions:

    • Structural data offer a molecular basis for studying nitrogenase function.
    • Understanding nitrogenase mechanism has broad biochemical implications.
    • Conformational coupling of nucleotide hydrolysis is relevant to various biochemical systems.