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Class of enzymes From Wikipedia, the free encyclopedia
In enzymology, a ferredoxin—nitrate reductase (EC 1.7.7.2) is an enzyme that catalyzes the chemical reaction
ferredoxin—nitrate reductase | |||||||||
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Identifiers | |||||||||
EC no. | 1.7.7.2 | ||||||||
CAS no. | 60382-69-6 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
Gene Ontology | AmiGO / QuickGO | ||||||||
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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]
As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1PFD.
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