Glutathione dehydrogenase (ascorbate)

This enzyme belongs to the family of oxidoreductases, specifically those acting on a sulfur group of donors with a quinone or similar compound as acceptor. The systematic name of this enzyme class is glutathione:dehydroascorbate oxidoreductase. Other names in common use include dehydroascorbic reductase, dehydroascorbic acid reductase, glutathione dehydroascorbate reductase, DHA reductase, dehydroascorbate reductase, GDOR, and glutathione:dehydroascorbic acid oxidoreductase. This enzyme participates in 3 metabolic pathways: ascorbate and aldarate metabolism, glutamate metabolism, and glutathione metabolism.

Structural studies

As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes 2HZE and 2HZF.

References

Crook EM (1941). "The system dehydroascorbic acid-glutathione". Biochem. J. 35: 226–236.

Oxidoreductases: sulfur oxidoreductases (EC 1.8)

1.8.1: NAD or NADP	Dihydrolipoamide dehydrogenase Glutathione reductase Thioredoxin reductase

1.8.2: cytochrome	Sulfite dehydrogenase Thiosulfate dehydrogenase

1.8.3: oxygen	Sulfite oxidase

1.8.4: disulfide	Glutathione—homocystine transhydrogenase

1.8.5: quinone	Glutathione dehydrogenase (ascorbate)

1.8.98: Other, known	CoB—CoM heterodisulfide reductase

1.8.99: Other	Sulfite reductase

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases(list) EC2 Transferases(list) EC3 Hydrolases(list) EC4 Lyases(list) EC5 Isomerases(list) EC6 Ligases(list)

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