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Nitrate and periplasmic nitrate reductases.

Courtney Sparacino-Watkins1, John F Stolz, Partha Basu

  • 1Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282, USA. basu@duq.edu.

Chemical Society Reviews
|October 22, 2013
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Summary
This summary is machine-generated.

Nitrate is crucial for nitrogen cycling and human health. This review focuses on periplasmic nitrate reductases (Nap), exploring their diverse roles and structures in bacterial nitrate reduction.

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Area of Science:

  • Biochemistry
  • Microbiology
  • Environmental Science

Background:

  • Nitrate anion is vital in nitrogen cycling, climate change, and human health.
  • Recent research highlights potential medical applications of nitrate.
  • Bacteria reduce nitrate to nitrite using various nitrate reductases.

Purpose of the Study:

  • To review the significance of nitrate in environmental and health contexts.
  • To detail the taxonomy and types of nitrate reductases (Nap, Nar, Nas).
  • To focus on the structure, function, and phylogeny of periplasmic nitrate reductase (Nap).

Main Methods:

  • Literature review of nitrate reductases, focusing on Nap proteins.
  • Analysis of catalytic, kinetic, structural, and redox properties.
  • Examination of auxiliary proteins, operon structure, and phylogenetic relationships.

Main Results:

  • Nitrate reductases are classified into three types: Nap, Nar, and Nas.
  • Nap proteins, despite catalytic similarities, are phylogenetically distinct across Proteobacteria.
  • Detailed discussion of Nap subunit, auxiliary proteins, and operon organization.

Conclusions:

  • Periplasmic nitrate reductase (Nap) is a key enzyme in bacterial nitrate metabolism.
  • Understanding Nap's diversity and function is crucial for environmental and biomedical research.
  • Further scientific exploration of nitrate's enigmatic properties is warranted.