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Pathway Description
Glutathione Metabolism
Homo sapiens
Metabolic Pathway
Glutathione (GSH) is an low-molecular-weight thiol and antioxidant in various species such as plants, mammals and microbes. Glutathione plays important roles in nutrient metabolism, gene expression, etc. and sufficient protein nutrition is important for maintenance of GSH homeostasis. Glutathione is synthesized from glutamate, cysteine, and glycine sequentially by gamma-glutamylcysteine synthetase and GSH synthetase. L-Glutamic acid and cysteine are synthesized to form gamma-glutamylcysteine by glutamate-cysteine ligase that is powered by ATP. Gamma-glutamylcysteine and glycine can be synthesized to form glutathione by enzyme glutathione synthetase that is powered by ATP, too. Glutathione exists oxidized (GSSG) states and in reduced (GSH) state. Oxidation of glutathione happens due to relatively high concentration of glutathione within cells.
References
Glutathione Metabolism References
Lehninger, A.L. Lehninger principles of biochemistry (4th ed.) (2005). New York: W.H Freeman.
Salway, J.G. Metabolism at a glance (3rd ed.) (2004). Alden, Mass.: Blackwell Pub.
Lu SC: Glutathione synthesis. Biochim Biophys Acta. 2013 May;1830(5):3143-53. doi: 10.1016/j.bbagen.2012.09.008. Epub 2012 Sep 17.
Pubmed: 22995213
Ookhtens M, Kaplowitz N: Role of the liver in interorgan homeostasis of glutathione and cyst(e)ine. Semin Liver Dis. 1998;18(4):313-29. doi: 10.1055/s-2007-1007167.
Pubmed: 9875551
Kaplowitz N, Aw TY, Ookhtens M: The regulation of hepatic glutathione. Annu Rev Pharmacol Toxicol. 1985;25:715-44. doi: 10.1146/annurev.pa.25.040185.003435.
Pubmed: 3890714
Forman HJ, Zhang H, Rinna A: Glutathione: overview of its protective roles, measurement, and biosynthesis. Mol Aspects Med. 2009 Feb-Apr;30(1-2):1-12. doi: 10.1016/j.mam.2008.08.006. Epub 2008 Aug 30.
Pubmed: 18796312
Meister A: Glutathione metabolism and its selective modification. J Biol Chem. 1988 Nov 25;263(33):17205-8.
Pubmed: 3053703
Bachhawat AK, Thakur A, Kaur J, Zulkifli M: Glutathione transporters. Biochim Biophys Acta. 2013 May;1830(5):3154-64. doi: 10.1016/j.bbagen.2012.11.018. Epub 2012 Nov 30.
Pubmed: 23206830
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