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Nitrite oxidoreductase (NOR or NXR) is an enzyme involved in nitrification.It is the last step in the process of aerobic ammonia oxidation, which is carried out by two groups of nitrifying bacteria: ammonia oxidizers such as Nitrosospira, Nitrosomonas, and Nitrosococcus convert ammonia to nitrite, while nitrite oxidizers such as Nitrobacter and Nitrospira oxidize nitrite to nitrate.
Nitric oxide reductase was assigned Enzyme Commission number (EC) 1.7.2.5. Enzyme Commission numbers are the standard naming system used for enzymes. [5] The EC identifies the class, subclass, sub-subclass, and serial number of the enzyme. [5] Nitric oxide reductase is in Class 1, therefore it is an oxidoreductases. [5] Figure 1. The Nitrogen ...
The systematic name of this enzyme class is ammonium-hydroxide:NAD(P)+ oxidoreductase. Other names in common use include nitrite reductase (reduced nicotinamide adenine dinucleotide , (phosphate)) , NADH-nitrite oxidoreductase , NADPH-nitrite reductase , assimilatory nitrite reductase , nitrite reductase [NAD(P)H2] , and NAD(P)H2:nitrite ...
Nitric oxide reductase (NAD(P), nitrous oxide-forming) (EC 1.7.1.14, fungal nitric oxide reductase, cytochrome P450nor, NOR (ambiguous)) is an enzyme with systematic name nitrous oxide:NAD(P) oxidoreductase.
The reduced d hemes bind nitrite and convert it to product. [4] Cytochrome c nitrite reductase (ccNIR) is a multiheme enzyme that converts nitrite to ammonia on each active site. The active site iron is bound to a protoporphyrin IX ring that is covalently linked to the enzyme's proteins.
In enzymology, a nitrous oxide reductase also known as nitrogen:acceptor oxidoreductase (N 2 O-forming) is an enzyme that catalyzes the final step in bacterial denitrification, the reduction of nitrous oxide to dinitrogen. [1] [2] N 2 O + 2 reduced cytochome c ⇌ N 2 + H 2 O + 2 cytochrome c