Enzymatic α(1→2)-l-fucosylation: investigation of the specificity of the α(1→2)-l-galactosyltransferase from Helix pomatia
摘要:
The alpha(1-->2)-L-galactosyltransferase from Helix pomatia transfers an L-fucosyl residue from GDP-L-Fucose to a terminal, non-reducin D-galactopyranosyl moiety of an oligosaccharide. The extent of the enzyme's specificity towards the stereochemistry at the D-galactopyranosyl anomeric centre, the site of interglycosidic linkage and the nature of the subterminal oliaosaccharide residue has been investigated using HPAEC-PAD and MALDI-TOF technology. This alpha(1-->2)-L-galactosyltransferase is specific for D-galactopyranosyl beta-linkages, independent of the site of the interglycosidic linkage and aglycone configuration and with limited specificity for the nature of the subterminal sugar residue. (C) 2003 Elsevier Ltd. All rights reserved.