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EC 1.7.99.7 Details

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EC number

1.7.99.7

Accepted name

nitric-oxide reductase

Reaction

nitrous oxide + acceptor + H₂O = 2 nitric oxide + reduced acceptor

Other name(s)

nitrogen oxide reductase, nitrous-oxide:(acceptor) oxidoreductase (NO-forming)

Systematic name

nitrous-oxide:acceptor oxidoreductase (NO-forming)

CAS registry number

37256-43-2

Comment

A heterodimer of cytochromes b and c. Phenazine methosulfate can act as acceptor.

History

created 1992, modified 1999, deleted 2011

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.1.1 With NAD⁺ or NADP⁺ as acceptor

1.1.2 With a cytochrome as acceptor

1.1.3 With oxygen as acceptor

1.1.3.1 created 1961, deleted 1984

1.1.3.2 L-lactate oxidase

1.1.3.3 malate oxidase

1.1.3.4 glucose oxidase

1.1.3.5 hexose oxidase

1.1.3.6 cholesterol oxidase

1.1.3.7 aryl-alcohol oxidase

1.1.3.8 L-gulonolactone oxidase

1.1.3.9 galactose oxidase

1.1.3.10 pyranose oxidase

1.1.3.11 L-sorbose oxidase

1.1.3.12 pyridoxine 4-oxidase

1.1.3.13 alcohol oxidase

1.1.3.14 catechol oxidase (dimerizing)

1.1.3.15 (S)-2-hydroxy-acid oxidase

1.1.3.16 ecdysone oxidase

1.1.3.17 choline oxidase

1.1.3.18 secondary-alcohol oxidase

1.1.3.19 4-hydroxymandelate oxidase (decarboxylating)

1.1.3.20 long-chain-alcohol oxidase

1.1.3.21 glycerol-3-phosphate oxidase

1.1.3.22 created 1961 as EC 1.2.3.2, transferred 1984 to EC 1.1.3.22, modified 1989, deleted 2004

1.1.3.23 thiamine oxidase

1.1.3.24 L-galactonolactone oxidase

1.1.3.25 created 1986, deleted 2005

1.1.3.26 created 1989, deleted 2002

1.1.3.27 hydroxyphytanate oxidase

1.1.3.28 nucleoside oxidase

1.1.3.29 N-acylhexosamine oxidase

1.1.3.30 polyvinyl-alcohol oxidase

1.1.3.31 created 1992, deleted 2003

1.1.3.32 created 1999, deleted 2002

1.1.3.33 created 1999, deleted 2002

1.1.3.34 created 1999, deleted 2002

1.1.3.35 created 1999, deleted 2002

1.1.3.36 created 1999, deleted 2002

1.1.3.37 D-arabinono-1,4-lactone oxidase

1.1.3.38 vanillyl-alcohol oxidase

1.1.3.39 nucleoside oxidase (H₂O₂-forming)

1.1.3.40 D-mannitol oxidase

1.1.3.41 alditol oxidase

1.1.3.42 prosolanapyrone-II oxidase

1.1.3.43 paromamine 6′-oxidase

1.1.3.44 6′′′-hydroxyneomycin C oxidase

1.1.3.45 aclacinomycin-N oxidase

1.1.3.46 4-hydroxymandelate oxidase

1.1.3.47 5-(hydroxymethyl)furfural oxidase

1.1.3.48 3-deoxy-α-D-manno-octulosonate 8-oxidase

1.1.3.49 (R)-mandelonitrile oxidase

1.1.3.50 C-glycoside oxidase

1.1.4 With a disulfide as acceptor

1.1.5 With a quinone or similar compound as acceptor

1.1.7 With an iron-sulfur protein as acceptor

1.1.9 With a copper protein as acceptor

1.1.98 With other, known, physiological acceptors

1.1.98.1 alcohol dehydrogenase (azurin)

1.1.98.2 glucose-6-phosphate dehydrogenase (coenzyme-F₄₂₀)

1.1.98.3 decaprenylphospho-β-D-ribofuranose 2-dehydrogenase

1.1.98.4 F₄₂₀H₂:quinone oxidoreductase

1.1.98.5 secondary-alcohol dehydrogenase (coenzyme-F₄₂₀)

1.1.98.6 ribonucleoside-triphosphate reductase (formate)

1.1.98.7 serine-type anaerobic sulfatase-maturating enzyme

1.1.99 With unknown physiological acceptors

1.2 Acting on the aldehyde or oxo group of donors

1.3 Acting on the CH-CH group of donors

1.4 Acting on the CH-NH₂ group of donors

1.5 Acting on the CH-NH group of donors

1.6 Acting on NADH or NADPH

1.7 Acting on other nitrogenous compounds as donors

1.7.1 With NAD⁺ or NADP⁺ as acceptor

1.7.2 With a cytochrome as acceptor

1.7.3 With oxygen as acceptor

1.7.5 With a quinone or similar compound as acceptor

1.7.6 With a nitrogenous group as acceptor

1.7.7 With an iron-sulfur protein as acceptor

1.7.9 With a copper protein as acceptor

1.7.99 With unknown physiological acceptors

1.7.99.1 hydroxylamine reductase

1.7.99.2 created 1961, modified 1976, deleted 1992

1.7.99.3 created 1961 as EC 1.6.6.5, transferred 1964 to EC 1.7.99.3, modified 1976, deleted 2002

1.7.99.4 nitrate reductase

1.7.99.5 created 1965 as EC 1.1.1.68, transferred 1978 to EC 1.1.99.15, transferred 1980 to EC 1.7.99.5, deleted 2005

1.7.99.6 nitrous-oxide reductase

1.7.99.7 nitric-oxide reductase

1.7.99.8 hydrazine oxidoreductase

1.8 Acting on a sulfur group of donors

1.9 Acting on a heme group of donors

1.10 Acting on diphenols and related substances as donors

1.11 Acting on a peroxide as acceptor

1.12 Acting on hydrogen as donor

1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

1.15 Acting on superoxide as acceptor

1.16 Oxidizing metal ions

1.17 Acting on CH or CH₂ groups

1.18 Acting on iron-sulfur proteins as donors

1.19 Acting on reduced flavodoxin as donor

1.20 Acting on phosphorus or arsenic in donors

1.21 Catalysing the reaction X-H + Y-H = X-Y

1.21.1 With NAD⁺ or NADP⁺ as acceptor

1.21.3 With oxygen as acceptor

1.21.4 With a disulfide as acceptor

1.21.98 With other, known, physiological acceptors

1.21.99 With unknown physiological acceptors

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

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Release 2023.1 (January 2023)