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Glutathione Synthesis Pathway
- Molecular classification
- Enzyme
01
Overview
The glutathione synthesis pathway is a highly conserved, ATP-dependent biosynthetic process responsible for producing glutathione (GSH), a tripeptide composed of glutamate, cysteine, and glycine. GSH plays critical roles in cellular detoxification, antioxidant defense, maintenance of redox status, and modulation of cell proliferation. The pathway involves two sequential enzymatic steps: the formation of γ-glutamylcysteine (catalyzed by glutamate–cysteine ligase) and the formation of glutathione (catalyzed by glutathione synthetase). Regulation occurs through cysteine availability and feedback inhibition by intracellular GSH. Altered GSH levels are associated with numerous diseases.
- Other names
- γ-Glutamyl CycleGSH synthesis
02
Mechanism of action
Inhibition of Glutamate-Cysteine Ligase (GCL) or Glutathione Synthetase (GS)
03
Biological functions
DetoxificationAntioxidant defenseRedox homeostasisCysteine storageDrug metabolism
04
Disease associations
CancerCardiovascular diseaseNeurodegenerative diseaseImmune dysfunctionMetabolic syndromes
05
Safety considerations
Depletion of GSH can lead to increased oxidative stressInhibition may affect normal cellular functions
06
Biomarkers
GSH levelsGCLC expressionGSS expression
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