Английская Википедия:Ferredoxin—nitrate reductase

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Шаблон:Short description Шаблон:Infobox enzyme In enzymology, a ferredoxin—nitrate reductase (Шаблон:EC number) is an enzyme that catalyzes the chemical reaction

nitrite + H2O + 2 oxidized ferredoxin <math>\rightleftharpoons</math> nitrate + 2 reduced ferredoxin + 2 H+

The 3 substrates of this enzyme are nitrite, H2O, and oxidized ferredoxin, whereas its 3 products are nitrate, reduced ferredoxin, and H+. Nitrate Reductase is an essential enzyme present in most biological systems such as green plants, certain fungi, yeasts and bacteria that aids in the reduction of nitrate to ammonium.[1]

This enzyme belongs to the family of oxidoreductases, specifically those acting on other nitrogenous compounds as donors with an iron-sulfur protein as acceptor. The systematic name of this enzyme class is nitrite:ferredoxin oxidoreductase. Other names in common use include assimilatory nitrate reductase, nitrate (ferredoxin) reductase, and assimilatory ferredoxin-nitrate reductase. This enzyme participates in nitrogen metabolism. It has 4 cofactors: iron, Sulfur, Molybdenum, and Iron-sulfur. The Iron-Sulfur cluster ([4FE-4S]) in this enzyme has a variety of different functions that contribute to the growth of aerobic cells. Some of the functions include but are not limited to the following: involved in photosynthetic processes, electron-transfer reactions and the binding of certain substrates, resulting in activation.[2]

Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code Шаблон:PDB link.

References

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Further reading

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Шаблон:Nitrogenous donor oxidoreductases Шаблон:Enzymes Шаблон:Portal bar


Шаблон:1.7-enzyme-stub