ExplorEnz: EC 1.7.1.4

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1.7.1.4

Accepted name:

nitrite reductase [NAD(P)H]

Reaction:

NH₃ + 3 NAD(P)⁺ + 2 H₂O = nitrite + 3 NAD(P)H + 5 H⁺

Other name(s):

nitrite reductase (reduced nicotinamide adenine dinucleotide (phosphate)); assimilatory nitrite reductase (ambiguous); nitrite reductase [NAD(P)H₂]; NAD(P)H₂:nitrite oxidoreductase; nit-6 (gene name)

Systematic name:

ammonia:NAD(P)⁺ oxidoreductase

Comments:

An iron-sulfur flavoprotein (FAD) containing siroheme. The enzymes from the fungi Neurospora crassa [1], Emericella nidulans [2] and Candida nitratophila [4] can use either NADPH or NADH as electron donor. cf. EC 1.7.1.15, nitrite reductase (NADH).

Links to other databases:

BRENDA, EXPASY, Gene, KEGG, MetaCyc, PDB, CAS registry number: 9029-29-2

References:

1.	Nicholas, D.J.D., Medina, A. and Jones, O.T.G. A nitrite reductase from Neurospora crassa. Biochim. Biophys. Acta 37 (1960) 468–476. [PMID: 14426899]
2.	Pateman, J.A., Rever, B.M. and Cove, D.J. Genetic and biochemical studies of nitrate reduction in Aspergillus nidulans. Biochem. J. 104 (1967) 103–111. [PMID: 4382427]
3.	Rivas, J., Guerrero, M. G., Paneque, A. and Losada, M. Characterization of the nitrate-reducing system of the yeast Torulopsis nitratophila. Plant Sci. Lett. 1 (1973) 105–113.
4.	Lafferty, M.A. and Garrett, R.H. Purification and properties of the Neurospora crassa assimilatory nitrite reductase. J. Biol. Chem. 249 (1974) 7555–7567. [PMID: 4154942]
5.	Vega, J.M. and Garrett, R.H. Siroheme: a prosthetic group of the Neurospora crassa assimilatory nitrite reductase. J. Biol. Chem. 250 (1975) 7980–7989. [PMID: 126995]
6.	Greenbaum, P., Prodouz, K.N. and Garrett, R.H. Preparation and some properties of homogeneous Neurospora crassa assimilatory NADPH-nitrite reductase. Biochim. Biophys. Acta 526 (1978) 52–64. [DOI] [PMID: 150863]
7.	Prodouz, K.N. and Garrett, R.H. Neurospora crassa NAD(P)H-nitrite reductase. Studies on its composition and structure. J. Biol. Chem. 256 (1981) 9711–9717. [PMID: 6457037]
8.	Exley, G.E., Colandene, J.D. and Garrett, R.H. Molecular cloning, characterization, and nucleotide sequence of nit-6, the structural gene for nitrite reductase in Neurospora crassa. J. Bacteriol. 175 (1993) 2379–2392. [DOI] [PMID: 8096840]
9.	Colandene, J.D. and Garrett, R.H. Functional dissection and site-directed mutagenesis of the structural gene for NAD(P)H-nitrite reductase in Neurospora crassa. J. Biol. Chem. 271 (1996) 24096–24104. [DOI] [PMID: 8798648]

[EC 1.7.1.4 created 1961 as EC 1.6.6.4, transferred 2002 to EC 1.7.1.4, modified 2013]