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- Glutathione-ascorbate_cycle abstract "The glutathione-ascorbate cycle is a metabolic pathway that detoxifies hydrogen peroxide (H2O2), which is a reactive oxygen species that is produced as a waste product in metabolism. The cycle involves the antioxidant metabolites: ascorbate, glutathione and NADPH and the enzymes linking these metabolites.In the first step of this pathway, H2O2 is reduced to water by ascorbate peroxidase (APX) using ascorbate as the electron donor. The oxidized ascorbate (monodehydroascorbate) is regenerated by monodehydroascorbate reductase (MDAR). However, monodehydroascorbate is a radical and if not rapidly reduced it disproportionates into ascorbate and dehydroascorbate. Dehydroascorbate is reduced to ascorbate by dehydroascorbate reductase at the expense of GSH, yielding oxidized glutathione (GSSG). Finally GSSG is reduced by glutathione reductase (GR) using NADPH as electron donor. Thus ascorbate and glutathione are not consumed; the net electron flow is from NADPH to H2O2. The reduction of dehydroascorbate may be non-enzymatic or catalysed by proteins with dehydroascorbate reductase (DHAR) activity, such as glutathione S-transferase omega 1 or glutaredoxins.In plants, the glutathione-ascorbate cycle operates in the cytosol, mitochondria, plastids and peroxisomes. Since glutathione, ascorbate and NADPH are present in high concentrations in plant cells it is assumed that the glutathione-ascorbate cycle plays a key role for H2O2 detoxification. Nevertheless, other enzymes (peroxidases) including peroxiredoxins and glutathione peroxidases, which use thioredoxins or glutaredoxins as reducing substrates, also contribute to H2O2 removal in plants.".
- Glutathione-ascorbate_cycle thumbnail Glutathione-ascorbate_cycle_4.png?width=300.
- Glutathione-ascorbate_cycle wikiPageID "23204882".
- Glutathione-ascorbate_cycle wikiPageLength "4303".
- Glutathione-ascorbate_cycle wikiPageOutDegree "37".
- Glutathione-ascorbate_cycle wikiPageRevisionID "594214002".
- Glutathione-ascorbate_cycle wikiPageWikiLink Antioxidant.
- Glutathione-ascorbate_cycle wikiPageWikiLink Ascorbate.
- Glutathione-ascorbate_cycle wikiPageWikiLink Ascorbate_peroxidase.
- Glutathione-ascorbate_cycle wikiPageWikiLink Category:Antioxidants.
- Glutathione-ascorbate_cycle wikiPageWikiLink Category:Free_radicals.
- Glutathione-ascorbate_cycle wikiPageWikiLink Category:Metabolism.
- Glutathione-ascorbate_cycle wikiPageWikiLink Cytosol.
- Glutathione-ascorbate_cycle wikiPageWikiLink Dehydroascorbate_reductase.
- Glutathione-ascorbate_cycle wikiPageWikiLink Electron.
- Glutathione-ascorbate_cycle wikiPageWikiLink GSSG.
- Glutathione-ascorbate_cycle wikiPageWikiLink GSTO1.
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutaredoxin.
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutaredoxins.
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutathione.
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutathione_dehydrogenase_(ascorbate).
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutathione_disulfide.
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutathione_peroxidase.
- Glutathione-ascorbate_cycle wikiPageWikiLink Glutathione_reductase.
- Glutathione-ascorbate_cycle wikiPageWikiLink Hydrogen.
- Glutathione-ascorbate_cycle wikiPageWikiLink Hydrogen_peroxide.
- Glutathione-ascorbate_cycle wikiPageWikiLink Metabolic_pathway.
- Glutathione-ascorbate_cycle wikiPageWikiLink Metabolism.
- Glutathione-ascorbate_cycle wikiPageWikiLink Mitochondria.
- Glutathione-ascorbate_cycle wikiPageWikiLink Mitochondrion.
- Glutathione-ascorbate_cycle wikiPageWikiLink Monodehydroascorbate_reductase_(NADH).
- Glutathione-ascorbate_cycle wikiPageWikiLink NADPH.
- Glutathione-ascorbate_cycle wikiPageWikiLink Nicotinamide_adenine_dinucleotide_phosphate.
- Glutathione-ascorbate_cycle wikiPageWikiLink Oxidative_stress.
- Glutathione-ascorbate_cycle wikiPageWikiLink Oxygen.
- Glutathione-ascorbate_cycle wikiPageWikiLink Peroxidase.
- Glutathione-ascorbate_cycle wikiPageWikiLink Peroxidases.
- Glutathione-ascorbate_cycle wikiPageWikiLink Peroxiredoxin.
- Glutathione-ascorbate_cycle wikiPageWikiLink Peroxiredoxins.
- Glutathione-ascorbate_cycle wikiPageWikiLink Peroxisome.
- Glutathione-ascorbate_cycle wikiPageWikiLink Peroxisomes.
- Glutathione-ascorbate_cycle wikiPageWikiLink Plant.
- Glutathione-ascorbate_cycle wikiPageWikiLink Plants.
- Glutathione-ascorbate_cycle wikiPageWikiLink Plastid.
- Glutathione-ascorbate_cycle wikiPageWikiLink Plastids.
- Glutathione-ascorbate_cycle wikiPageWikiLink Reactive_oxygen_species.
- Glutathione-ascorbate_cycle wikiPageWikiLink Thioredoxin.
- Glutathione-ascorbate_cycle wikiPageWikiLink Vitamin_C.
- Glutathione-ascorbate_cycle wikiPageWikiLink File:Glutathione-ascorbate_cycle_4.png.
- Glutathione-ascorbate_cycle wikiPageWikiLinkText "Glutathione-ascorbate cycle".
- Glutathione-ascorbate_cycle wikiPageWikiLinkText "glutathione-ascorbate cycle".
- Glutathione-ascorbate_cycle hasPhotoCollection Glutathione-ascorbate_cycle.
- Glutathione-ascorbate_cycle wikiPageUsesTemplate Template:Reflist.
- Glutathione-ascorbate_cycle subject Category:Antioxidants.
- Glutathione-ascorbate_cycle subject Category:Free_radicals.
- Glutathione-ascorbate_cycle subject Category:Metabolism.
- Glutathione-ascorbate_cycle hypernym Pathway.
- Glutathione-ascorbate_cycle type AnatomicalStructure.
- Glutathione-ascorbate_cycle type Biomolecule.
- Glutathione-ascorbate_cycle type Biomolecule.
- Glutathione-ascorbate_cycle type Process.
- Glutathione-ascorbate_cycle type Substance.
- Glutathione-ascorbate_cycle comment "The glutathione-ascorbate cycle is a metabolic pathway that detoxifies hydrogen peroxide (H2O2), which is a reactive oxygen species that is produced as a waste product in metabolism. The cycle involves the antioxidant metabolites: ascorbate, glutathione and NADPH and the enzymes linking these metabolites.In the first step of this pathway, H2O2 is reduced to water by ascorbate peroxidase (APX) using ascorbate as the electron donor.".
- Glutathione-ascorbate_cycle label "Glutathione-ascorbate cycle".
- Glutathione-ascorbate_cycle sameAs グルタチオン-アスコルビン酸回路.
- Glutathione-ascorbate_cycle sameAs m.065y9fb.
- Glutathione-ascorbate_cycle sameAs Q5572462.
- Glutathione-ascorbate_cycle sameAs Q5572462.
- Glutathione-ascorbate_cycle wasDerivedFrom Glutathione-ascorbate_cycle?oldid=594214002.
- Glutathione-ascorbate_cycle depiction Glutathione-ascorbate_cycle_4.png.
- Glutathione-ascorbate_cycle isPrimaryTopicOf Glutathione-ascorbate_cycle.