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Bacterial nitric oxide synthesis.

F Cutruzzolà1

  • 1Dipartimento di Scienze Biochimiche, Università di Roma 'La Sapienza', P.le A. Moro, 5, 00185, Rome, Italy. cutruzzola@axcasp.caspur.it

Biochimica Et Biophysica Acta
|May 13, 1999
PubMed
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This paper reviews nitrite reductase structure and function, crucial for nitric oxide (NO) production in denitrification. New structural data reveals enzyme mechanisms and NO regulation in microbes.

Area of Science:

  • Biochemistry
  • Microbiology
  • Enzymology

Background:

  • Nitrite reductases are essential enzymes in dissimilatory denitrification.
  • These enzymes catalyze the reduction of nitrite to nitric oxide (NO).
  • Understanding NO production mechanisms is vital in microbial respiration.

Purpose of the Study:

  • To review structure-function relationships of nitrite reductases.
  • To detail the mechanisms of nitric oxide production.
  • To present implications for regulating NO levels in denitrifiers.

Main Methods:

  • Review of existing literature on nitrite reductases.
  • Analysis of high-resolution structural data for copper- and heme-containing enzymes.
  • Discussion of biochemical pathways and regulatory mechanisms.

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Main Results:

  • Detailed insights into the catalytic mechanisms of nitrite reductases.
  • High-resolution structures reveal enzyme active sites and cofactor interactions.
  • New information on how NO steady-state levels are regulated in denitrifiers.

Conclusions:

  • Structure-function studies enhance understanding of NO biosynthesis.
  • Nitrite reductase structures provide a basis for exploring enzyme regulation.
  • This review consolidates knowledge on NO production in microbial denitrification.