Enzyme-catalyzed glycosylation of peptides using a synthetic lipid disaccharide substrate
摘要:
A lipid disaccharide, consisting of chitobiose linked to dilichol via an alpha-1-pyrophosphate, has been synthesized for use as a substrate in the enzyme-catalyzed glycosylation of peptides. For the purpose of confirming the structure of the reaction product, the expected glycopeptide was synthesized via an unambiguous, convergent method. Chromatographic and spectral comparison of the synthetic vs biosynthetic glycopeptides showed that they were identical. Thus, glycosylation of synthetic peptides by a synthetically accessible lipid disaccharide can be effected using oligosaccharyltransferase isolated from yeast.
Enzyme-catalyzed glycosylation of peptides using a synthetic lipid disaccharide substrate
摘要:
A lipid disaccharide, consisting of chitobiose linked to dilichol via an alpha-1-pyrophosphate, has been synthesized for use as a substrate in the enzyme-catalyzed glycosylation of peptides. For the purpose of confirming the structure of the reaction product, the expected glycopeptide was synthesized via an unambiguous, convergent method. Chromatographic and spectral comparison of the synthetic vs biosynthetic glycopeptides showed that they were identical. Thus, glycosylation of synthetic peptides by a synthetically accessible lipid disaccharide can be effected using oligosaccharyltransferase isolated from yeast.