Glutathione oxidized, often abbreviated as GSSG, is the disulfide form of glutathione.
CAT No: R2057
CAS No:27025-41-8
Chemical Name:(2S)-2-amino-5-[[(2R)-3-[[(2R)-2-[[(4S)-4-amino-4-carboxybutanoyl]amino]-3-(carboxymethylamino)-3-oxopropyl]disulfanyl]-1-(carboxymethylamino)-1-oxopropan-2-yl]amino]-5-oxopentanoic acid
Glutathione oxidized is a pivotal biochemical compound recognized as the disulfide form of glutathione, a tripeptide consisting of glutamate, cysteine, and glycine. As the oxidized counterpart (GSSG) of reduced glutathione (GSH), it plays a central role in cellular redox homeostasis and is indispensable for studies examining oxidative stress, cellular detoxification mechanisms, and thiol-disulfide exchange reactions. Its unique ability to participate in reversible redox cycling underpins its significance in diverse research fields, including biochemistry, molecular biology, and cell physiology. The compound's well-defined redox properties and physiological relevance make it a critical reagent for probing the balance between oxidative and reductive processes in biological systems.
Redox biology research: Glutathione oxidized is widely employed in investigations of cellular redox status and oxidative stress pathways. Researchers utilize it to model and quantify the GSH/GSSG ratio, a key indicator of intracellular oxidative conditions. By modulating the balance between reduced and oxidized forms, scientists can assess the impact of various stressors or protective agents on cellular redox buffering capacity. This approach is fundamental for elucidating the molecular mechanisms underlying redox regulation, signaling, and adaptation in both prokaryotic and eukaryotic systems.
Enzyme kinetics and mechanism studies: The compound serves as an essential substrate or modulator in enzymatic assays involving glutathione reductase, glutathione peroxidase, and related redox-active enzymes. By providing a defined source of GSSG, it enables precise characterization of enzyme kinetics, substrate specificity, and catalytic efficiency. Such studies are crucial for understanding the roles of glutathione-dependent enzymes in detoxification, antioxidant defense, and the maintenance of redox equilibrium within cells.
Protein S-glutathionylation analysis: GSSG is instrumental in research focused on protein S-glutathionylation, a reversible post-translational modification that regulates protein function and protects cysteine residues from irreversible oxidation. Experimental protocols often employ the oxidized form to induce or mimic S-glutathionylation in vitro, facilitating the identification of target proteins and the investigation of their functional modulation under oxidative conditions. This application provides valuable insights into redox signaling networks and the molecular basis of cellular adaptation to stress.
Analytical standard and calibration: In analytical biochemistry, glutathione oxidized is frequently used as a calibration standard for quantitative assays, including high-performance liquid chromatography (HPLC), capillary electrophoresis, and mass spectrometry. Its defined chemical structure and stability make it suitable for establishing standard curves, validating analytical methods, and ensuring accurate quantification of glutathione species in biological samples. This is particularly important for studies monitoring fluctuations in glutathione pools during disease progression, toxicological evaluation, or metabolic profiling.
Cell culture and oxidative challenge models: The compound is utilized in cell culture systems to experimentally induce oxidative stress or to simulate redox imbalances. By introducing GSSG into the extracellular environment, researchers can perturb intracellular redox states and investigate cellular responses such as antioxidant enzyme induction, gene expression changes, and cell viability outcomes. These models are vital for assessing the efficacy of antioxidant compounds, deciphering stress response pathways, and exploring the interplay between redox dynamics and cellular function.
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