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1.7.2.1: nitrite reductase (NO-forming)

This is an abbreviated version!
For detailed information about nitrite reductase (NO-forming), go to the full flat file.

Word Map on EC 1.7.2.1

Reaction

nitric oxide
+
H2O
+
ferricytochrome c
=
nitrite
+
ferrocytochrome c
+ 2 H+

Synonyms

AcNIR, AfNiR, AniA, AxNiR, BRAO375_2740002, C551-O2 oxidoreductase, cd1 nitrite reductase, cd1NiR, cNOR, copper-containing dissimilatory nitrite reductase, copper-containing nitrite reductase, Cu-NIR, Cu-NirK, CuNIR, cytochrome c-551:O2, NO2- oxidoreductase, cytochrome cd, cytochrome cd1 nitrite reductase, cytochrome oxidase, dissimilatory nitrite reductase, dissimilatory nitrite reductase cytochrome cd1, EC 1.6.6.5, EC 1.7.99.3, EC 1.9.3.2, GK0767, GtNiR, HdNIR, hemoglobin, HydNIR, HYPDE_25578, KSU1_D0929, mARC1, mARC2, mitochondrial amidoxime reducing component, MRA2164, NiR, NiR-Pa, NirK, NirS, nitrite reductase, oxidase, Pseudomonas cytochrome, PaNiR, PNR, Pseudomonas cytochrome oxidase, PsNiR, reductase, nitrite (cytochrome), Rpic_4015, S58_68210

ECTree

     1 Oxidoreductases
         1.7 Acting on other nitrogenous compounds as donors
             1.7.2 With a cytochrome as acceptor
                1.7.2.1 nitrite reductase (NO-forming)

Systematic Name

Systematic Name on EC 1.7.2.1 - nitrite reductase (NO-forming)

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SYSTEMATIC NAME
IUBMB Comments
nitric-oxide:ferricytochrome-c oxidoreductase
The reaction is catalysed by two types of enzymes, found in the perimplasm of denitrifying bacteria. One type comprises proteins containing multiple copper centres, the other a heme protein, cytochrome cd1. Acceptors include c-type cytochromes such as cytochrome c-550 or cytochrome c-551 from Paracoccus denitrificans or Pseudomonas aeruginosa, and small blue copper proteins such as azurin and pseudoazurin. Cytochrome cd1 also has oxidase and hydroxylamine reductase activities. May also catalyse the reaction of hydroxylamine reductase (EC 1.7.99.1) since this is a well-known activity of cytochrome cd1.