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Glutathione Cycle Enzyme (N/A)

Target: N/A
Molecular classification: Enzyme

Overview

The term "glutathione cycle enzyme" refers to any of the enzymes involved in the glutathione (GSH) metabolic pathway, which is central to cellular redox homeostasis, detoxification, and regulation of various metabolic processes. This includes Glutamate–Cysteine Ligase (GCL), Glutathione Synthetase, Glutathione Peroxidases (GPx), Glutaredoxins, Glutathione Reductase, and Gamma-Glutamyl Transferase (GGT). These enzymes collectively maintain cellular redox balance, detoxify reactive oxygen species, participate in protein thiol modification, and support neurotransmitter regulation. Dysregulation can lead to increased susceptibility to oxidative stress-related diseases.

Other names: Glutathione metabolism enzymeGSH cycle enzymeGlutathione pathway enzymeGlutamate–Cysteine LigaseGlutathione SynthetaseGlutathione PeroxidasesGlutaredoxinsGlutathione ReductaseGamma-Glutamyl TransferaseGCLGPxGRGGTGSTGrx

Mechanism of action

Varies depending on the specific enzyme targeted. Inhibition of GGT, modulation of GPx activity, promotion of GSH synthesis.

Biological functions

Redox homeostasisDetoxificationAntioxidant defenseCell signalingAmino acid transportRegulation of glutamate levelsProtein glutathionylation/deglutathionylation

Disease associations

Neurodegenerative diseaseOxidative stress-related diseasesCancerImmune dysfunctionMetabolic disorders

Safety considerations

Potential for drug interactions due to altered detoxification capacityToxicity associated with altered redox balance

Biomarkers

GSH levelsGSSG/GSH ratioGGT activityGPx activityLevels of S-glutathionylated proteins

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