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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)

Metals Ions

Metals Ions on EC 1.7.2.1 - nitrite reductase (NO-forming)

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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
copper
LiCl
-
2 M, enzyme is activated by high salt concentrations
Molybdenum
nitrite reduction is catalyzed by molybdenum in the active site
NaCl
optimum salt concentration: 2 M
NaNO3
-
2 M, enzyme is activated by high salt concentrations
NH4Cl
-
2 M, enzyme is activated by high salt concentrations
Zn
-
the recombinant enzyme, expressed in Pseudomonas putida, contains c-heme but no d1-heme. Reconstitution of this protein with Zn-protoporphyrin IX in the place of the d1-heme. Photoexcitation of Zn-NIR is followed by electron transfer from the triplet excited state of the Zn-porphyrin to the oxidized c-haem. Reduction of the d1-heme is associated with a substantial reorganization of the coordination of the metal
Zn2+
present on surface of each monomer, crystallization data