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EC 1.8.1.13 Details

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EC number

1.8.1.13

Accepted name

bis-γ-glutamylcystine reductase

Reaction

2 γ-glutamylcysteine + NADP⁺ = bis-γ-glutamylcystine + NADPH + H⁺

Other name(s)

NADPH₂:bis-γ-glutamylcysteine oxidoreductase, GSR

Systematic name

γ-glutamylcysteine:NADP⁺ oxidoreductase

CAS registry number

117056-54-9

Comment

Contains FAD. The enzyme, which is found only in halobacteria, maintains the concentration of γ-glutamylcysteine, the major low molecular weight thiol in halobacteria. Not identical with EC 1.8.1.7 (glutathione-disulfide reductase) or EC 1.8.1.14 (CoA-disulfide reductase).

History

created 1992 as EC 1.6.4.9, transferred 2002 to EC 1.8.1.13, modified 2013

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

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

1.6.1 With NAD⁺ or NADP⁺ as acceptor

1.6.2 With a heme protein as acceptor

1.6.3 With oxygen as acceptor

1.6.4 With a disulfide as acceptor (deleted sub-subclass)

1.6.4.1 created 1961, deleted 2002

1.6.4.2 created 1961, modified 1989, deleted 2002

1.6.4.3 created 1961, modified 1976, deleted 1983

1.6.4.4 created 1965, deleted 2002

1.6.4.5 created 1972, deleted 2002

1.6.4.6 created 1972, deleted 2002

1.6.4.7 created 1978, deleted 2002

1.6.4.8 created 1989, deleted 2002

1.6.4.9 created 1992, deleted 2002

1.6.4.10 created 1992, deleted 2002

1.6.5 With a quinone or similar compound as acceptor

1.6.6 With a nitrogenous group as acceptor

1.6.7 With an iron-sulfur protein as acceptor (deleted sub-subclass)

1.6.8 With a flavin as acceptor (deleted sub-subclass)

1.6.99 With unknown physiological acceptors

1.7 Acting on other nitrogenous compounds as donors

1.8 Acting on a sulfur group of donors

1.8.1 With NAD⁺ or NADP⁺ as acceptor

1.8.1.1 created 1961, deleted 1972

1.8.1.2 assimilatory sulfite reductase (NADPH)

1.8.1.3 hypotaurine dehydrogenase

1.8.1.4 dihydrolipoyl dehydrogenase

1.8.1.5 2-oxopropyl-CoM reductase (carboxylating)

1.8.1.6 cystine reductase

1.8.1.7 glutathione-disulfide reductase

1.8.1.8 protein-disulfide reductase

1.8.1.9 thioredoxin-disulfide reductase

1.8.1.10 CoA-glutathione reductase

1.8.1.11 asparagusate reductase

1.8.1.12 trypanothione-disulfide reductase

1.8.1.13 bis-γ-glutamylcystine reductase

1.8.1.14 CoA-disulfide reductase

1.8.1.15 mycothione reductase

1.8.1.16 glutathione amide reductase

1.8.1.17 dimethylsulfone reductase

1.8.1.18 NAD(P)H sulfur oxidoreductase (CoA-dependent)

1.8.1.19 sulfide dehydrogenase

1.8.1.20 4,4′-dithiodibutanoate disulfide reductase

1.8.1.21 dissimilatory dimethyldisulfide reductase

1.8.2 With a cytochrome as acceptor

1.8.3 With oxygen as acceptor

1.8.4 With a disulfide as acceptor

1.8.5 With a quinone or similar compound as acceptor

1.8.6 With a nitrogenous group as acceptor (deleted sub-subclass)

1.8.7 With an iron-sulfur protein as acceptor

1.8.98 With other, known, physiological acceptors

1.8.99 With unknown physiological acceptors

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)

1.98.1. undefined

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

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Release 2023.1 (January 2023)