| Post Translational Modifications | N-glycosylated on both chains. Contains hexoses, hexosamines and sialic acid residues. Glycosylation profiles tested in kidney and liver tissues reveal the presence of tissue-specific and site-specific glycan composition, despite the overlap in composition among the N-glycans. A total of 36 glycan compositions, with 40 unique structures are observed. Up to 15 different glycans are observed at a single site, with site-specific variation in glycan composition. The difference in glycosylation profiles in the 2 tissues do not affect the enzyme activity. Cleaved by autocatalysis into a large and a small subunit and the autocatalytic cleavage is essential to the functional activation of the enzyme. |
| Function | Cleaves the gamma-glutamyl bond of extracellular glutathione (gamma-Glu-Cys-Gly), glutathione conjugates (such as maresin conjugate (13R)-S-glutathionyl-(14S)-hydroxy-(4Z,7Z,9E,11E,16Z,19Z)-docosahexaenoate, MCTR1) and other gamma-glutamyl compounds (such as leukotriene C4, LTC4). The metabolism of glutathione by GGT1 releases free glutamate and the dipeptide cysteinyl-glycine, which is hydrolyzed to cysteine and glycine by dipeptidases. In the presence of high concentrations of dipeptides and some amino acids, can also catalyze a transpeptidation reaction, transferring the gamma-glutamyl moiety to an acceptor amino acid to form a new gamma-glutamyl compound. Contributes to cysteine homeostasis, glutathione homeostasis and in the conversion of the leukotriene LTC4 to LTD4. Isoform 3: Seems to be inactive. |
| Protein Name | Glutathione Hydrolase 1 ProenzymeGamma-Glutamyltransferase 1Gamma-Glutamyltranspeptidase 1Ggt 1Leukotriene-C4 HydrolaseCd Antigen Cd224 Cleaved Into - Glutathione Hydrolase 1 Heavy Chain - Glutathione Hydrolase 1 Light Chain |
| Database Links | Reactome: R-HSA-174403Reactome: R-HSA-2142691Reactome: R-HSA-5423646Reactome: R-HSA-5579022Reactome: R-HSA-9035968Reactome: R-HSA-9664535Reactome: R-HSA-9753281 |
| Cellular Localisation | Cell MembraneSingle-Pass Type Ii Membrane Protein |
| Alternative Protein Names | Glutathione Hydrolase 1 Proenzyme proteinGamma-Glutamyltransferase 1 proteinGamma-Glutamyltranspeptidase 1 proteinGgt 1 proteinLeukotriene-C4 Hydrolase proteinCd Antigen Cd224 Cleaved Into - Glutathione Hydrolase 1 Heavy Chain - Glutathione Hydrolase 1 Light Chain proteinGGT1 proteinGGT protein |
Information sourced from Uniprot.org
