ID   2.3.2.2
DE   gamma-glutamyltransferase.
AN   gamma-glutamyltranspeptidase.
AN   gamma-glutamyl transpeptidase.
AN   glutamyl transpeptidase.
CA   an alpha-amino acid + an N-terminal (5-L-glutamyl)-[peptide] = 5-L-
CA   glutamyl amino acid + N-terminal L-alpha-aminoacyl-[peptide].
CC   -!- The mammlian enzyme is part of the cell antioxidant defense
CC       mechanism.
CC   -!- It initiates extracellular glutathione (GSH) breakdown, provides
CC       cells with a local cysteine supply and contributes to maintain
CC       intracelular GSH levels.
CC   -!- The protein also has EC 3.4.19.13 activity.
CC   -!- The enzyme consists of two chains that are created by the proteolytic
CC       cleavage of a single precursor polypeptide.
CC   -!- The N-terminal L-threonine of the C-terminal subunit functions as the
CC       active site for both the cleavage and the hydrolysis reactions.
DR   Q05902, ECM38_YEAST;  Q8VYW6, GAGT1_ARATH;  Q680I5, GAGT2_ARATH;
DR   Q9M0G0, GAGT3_ARATH;  D4B387, GGT1_ARTBC ;  P19440, GGT1_HUMAN ;
DR   Q60928, GGT1_MOUSE ;  P20735, GGT1_PIG   ;  P07314, GGT1_RAT   ;
DR   Q9US04, GGT1_SCHPO ;  O14194, GGT2_SCHPO ;  A6NGU5, GGT3_HUMAN ;
DR   P36269, GGT5_HUMAN ;  Q9Z2A9, GGT5_MOUSE ;  Q9QWE9, GGT5_RAT   ;
DR   A7YWM1, GGT6_BOVIN ;  Q6P531, GGT6_HUMAN ;  Q6PDE7, GGT6_MOUSE ;
DR   Q6IE08, GGT6_RAT   ;  Q0V8L2, GGT7_BOVIN ;  Q9UJ14, GGT7_HUMAN ;
DR   Q99JP7, GGT7_MOUSE ;  Q99MZ4, GGT7_RAT   ;  P63186, GGT_BACNA  ;
DR   P54422, GGT_BACSU  ;  P18956, GGT_ECOLI  ;  Q9I406, GGT_PSEAE  ;
DR   P36267, GGT_PSEUA  ;  P74181, GGT_SYNY3  ;  P15557, PAC1_PSES3 ;
DR   Q05053, PAC1_PSESV ;  B8NM71, USTH_ASPFN ;  O05218, YWRD_BACSU ;
//