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Gamma-glutamyltransferase (also γ-glutamyltransferase, GGT, gamma-GT, gamma-glutamyl transpeptidase; [1] EC 2.3.2.2) is a transferase (a type of enzyme) that catalyzes the transfer of gamma- glutamyl functional groups from molecules such as glutathione to an acceptor that may be an amino acid, a peptide or water (forming glutamate). [1][2 ...
Hepatic (liver) involvement in some diseases can be of crucial importance. This testing is performed on a patient's blood sample. Some tests are associated with functionality (e.g., albumin), some with cellular integrity (e.g., transaminase), and some with conditions linked to the biliary tract (gamma-glutamyl transferase and alkaline ...
Gamma-glutamyltransferase-like activity 1 (GGTLA1) is a member of a gene family with at least 4 members (GGTLA1, GGTLA2, GGTLA3 and GGTLA4). The enzyme encoded by GGTLA1 is related to, but distinct from, gamma-glutamyl transpeptidase (GGT).
This peptide coupling is unique in that it occurs between the amino moiety of the cysteine and the terminal carboxylic acid of the glutamate side chain (hence the name gamma-glutamyl cysteine). [6] This peptide bond is resistant to cleavage by cellular peptidases and requires a specialized enzyme, gamma-glutamyl transpeptidase (γGT), to ...
Function. Human gamma-glutamyltransferase catalyzes the transfer of the glutamyl moiety of glutathione to a variety of amino acids and dipeptide acceptors. This heteroduplex enzyme is composed of a heavy chain and a light chain, which are derived from a single precursor protein, and is present in tissues involved in absorption and secretion.
Tissue transglutaminase (abbreviated as tTG or TG2) is a 78-kDa, calcium-dependent enzyme (EC 2.3.2.13) of the protein-glutamine γ-glutamyltransferases family (or simply transglutaminase family). [5][6] Like other transglutaminases, it crosslinks proteins between an ε- amino group of a lysine residue and a γ- carboxamide group of glutamine ...
Glutathione synthetase deficiency (GSD) is a rare autosomal recessive [1] metabolic disorder that prevents the production of glutathione. Glutathione helps prevent damage to cells by neutralizing harmful molecules generated during energy production. Glutathione also plays a role in processing medications and cancer-causing compounds ...
Gamma-glutamyl carboxylase is an enzyme that catalyzes the posttranslational modification of vitamin K -dependent proteins. Many of these vitamin K-dependent proteins are involved in coagulation so the function of the encoded enzyme is essential for hemostasis. [5] Most gla domain -containing proteins depend on this carboxylation reaction for ...