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6-sulfate modified N-acetylglucosamine (6-sulfo-GlcNAc) is often found as part of many biologically important carbohydrate epitopes such as 6-sulfo-LeX. In these epitopes, the 6-sulfo-GlcNAc moiety is extended by a galactose sugar in a β1-4 linkage. The β4GalT1 enzyme transfers galactose (Gal) from UDP-Gal to N-acetylglucosamine (GlcNAc) in the presence of manganese. Here we report that the β4GalT1...
The availability of structural information on glycosyltransferases is beginning to make structure-based reengineering of these enzymes possible. Mutant glycosyltransferases have been generated that can transfer a sugar residue with a chemically reactive unique functional group to a sugar moiety of glycoproteins, glycolipids, and proteoglycans (glyco-conjugates). The presence of modified sugar moiety...
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