Organisms Organism Name Enzyme Name Name of Glycotransferese GT Family References Virus T4- Phage BGT β-Glycosyltransferase GT63 [69] Prokaryotes A. tumefaciens AtGS Glycogen Synthase GT5 [15] Amycolatopsisorientalis GtfA β-Epi-vancosaminyltransferase GT-1 [70] GtfB β-Glycosyltransferase GT-1 [70] GtfD β -vancosaminyltransferase GT-1 [70] B. subtilis SpsA Putative glycosyltransferase GT-2 [71] Campylobactorjejuni CstII α-2-3-8-Sialyltransferase Gt-42 [72] E. coli. MurG β -1-4- Galactosyltranserase GT-28 [73] OtsA Trehalose-6-phosphate synthase GT-20 [74] RfaF Heptosyltransferase GT-9 [74] Neisseria meningitidis LgtC α -1-4-Galactosyltransferase GT-8 [75] Rhodothermusmarinus MGS Mannosylglycerate GT-78 [76] Mouse Ext12 α-1-4-N- Acetylhexosaminlytransferase GT-64 [18] ppGalNAc-T1 Polypeptide- α-GalNActransferase GT-27 [18] Rabbit Glycogenin α-Glucosyltransferase GT-8 [74] GnT1 β-1-2-GlcNAc transferase GT-13 [77] Bovine α3GalT α-3-Galactosyltransferase GT-6 [78] β4GalT1 β-1-4- Galactosyltransferase I GT-7 [78] Human GlcAT-I β-1-3-Glucuronytransferase GT-43 [19] GlcAT-P β-1-3-Glucuronytransferase GT-43 [79] GTA α-3-GalNAc transferase A GT-6 [80] GTB α-3-GalNAc transferase B GT-6 [80,81]

Table 1: Glycotransferases enzymes with available crystal structures.