Glutathione dehydrogenase (ascorbate)
In enzymology, a glutathione dehydrogenase (ascorbate) (EC 1.8.5.1) is an enzyme that catalyzes the chemical reaction
- 2 glutathione + dehydroascorbate glutathione disulfide + ascorbate
| glutathione dehydrogenase (ascorbate) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Dehydroascorbate reductase, Pennisetum americanum | |||||||||
| Identifiers | |||||||||
| EC no. | 1.8.5.1 | ||||||||
| CAS no. | 9026-38-4 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
Thus, the two substrates of this enzyme are glutathione and dehydroascorbate, whereas its two products are glutathione disulfide and 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 (March 1941). "The system dehydroascorbic acid-glutathione". The Biochemical Journal. 35 (3): 226–36. doi:10.1042/bj0350226. PMC 1265488. PMID 16747320.