dolichyl-diphosphooligosaccharide-protein glycotransferase EC#: 2.4.99.18; ChemWhat Code: 1377863
| Product Name | dolichyl-diphosphooligosaccharide-protein glycotransferase |
| Example Structure |  |
| Synonyms | AglB, AglB-L, AlgB, asparagine N-glycosyltransferase, DGL1, dolichyl-diphosphooligosaccharide–protein glycosyltransferase subunit OST2, dolichyl-diphosphooligosaccharide-protein glycosyltransferase, dolichyldiphosphooligosaccharide-protein oligosaccharyltransferase, glycosyltransferase, dolichyldiphosphooligosaccharide-protein, glycosyltransferase, dolichylpyrophosphodiacetylchitobiose-protein, L.m.STT3, Lm STT3, oligomannosyltransferase, oligosaccharide transferase, oligosaccharyl transferase, oligosaccharyl transferase 16 kDa subunit, oligosaccharyl transferase subunit epsilon, oligosaccharyl transferase subunit OST2, oligosaccharyltransferase, oligosaccharyltransferase complex, oligosaccharyltransferase STT3, oligosaccharyltransferase, dolichyldiphosphoryloligosaccharide-protein, OST, OST-I, OST-II, OST-III, OST1, OST2, OST3, Ost3p, OST4, OST5, Ost6p, OSTC(I), OSTC(II), OSTC(III), OTase, PglB, PglB oligosaccharyltransferase, PglB1, PglL, PilO, STT3, STT3 protein, STT3-1, STT3-2, STT3-3, STT3-4, Swp1p, TbSTT3A, TbSTT3B, TbSTT3C, Wbp1p, yeast oligosaccharyl transferase |
| EC Number | 2.4.99.18 |
| CAS Registry Number | 75302-32-8 |
| Comments | Occurs in eukaryotes that form a glycoprotein by the transfer of a glucosyl-mannosyl-glucosamine polysaccharide to the side-chain of an L-asparagine residue in the sequence -Asn-Xaa-Ser- or -Asn-Xaa-Thr- (Xaa not Pro) in nascent polypeptide chains. The basic oligosaccharide is the tetradecasaccharide Glc3Man9GlcNAc2. However, smaller oligosaccharides derived from it and oligosaccharides with additional monosaccharide units attached may be involved. See ref [2] for a review of N-glycoproteins in eukaryotes. Man3GlcNAc2 seems to be common for all of the oligosaccharides involved with the terminal N-acetylglucosamine linked to the protein L-asparagine. Occurs on the cytosolic face of the endoplasmic reticulum. The dolichol involved normally has 14-21 isoprenoid units with two trans double-bonds at the ¦Ø end, and the rest of the double-bonds in cis form. |
| Cofactor | |
| History | |
| Reactions | Dolichyl diphosphooligosaccharide + [protein]-L-asparagine = dolichyl diphosphate + a glycoprotein with the oligosaccharide chain attached by N-beta-D-glycosyl linkage to a protein L-asparagine. |
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