A chemoenzymatic method for the preparation of a core-fucoslyated glycoprotein or glycopeptide, including (a) providing an acceptor selected from the group consisting of a fucosylated GlcNAc-protein and fucosylated GlcNAc-peptide; and (b) reacting the acceptor with a donor substrate including an activated oligosaccharide moiety, in the presence of an endoglycosidase (ENGase) selected from Endo;F1, Endo-F2, Endo-F3, Endo-D and related glycosynthase mutants to transfer the oligosaccharide moiety to the acceptor and yield the structure defined core-fucosylated glycoprotein or glycopeptide. The donor substrate includes, in a specific implementation, a synthetic oligosaccharide oxazoline. A related method of fucosylated glycoprotein or fucosylated glycopeptide remodeling with a predetermined natural N-glycan or a tailor-made oligosaccharide moiety, and a method of remodeling an antibody to include a predetermined sugar chain to replace a heterogeneous sugar chain, are also described.
一种制备核心-岩藻糖苷化糖蛋白或糖肽的
化学酶法,包括 (a) 提供选自由岩藻糖苷化 GlcNAc 蛋白和岩藻糖苷化 GlcNAc 肽组成的组的受体;(b) 在选自 Endo;F1、Endo-F2、Endo-F3、Endo-D 和相关糖合成酶突变体的内切糖苷酶(ENGase)存在下,使受体与包括活化
寡糖分子的供体底物反应,将
寡糖分子转移到受体上,得到结构确定的核心岩藻糖基化糖蛋白或糖肽。供体底物在具体实施中包括合成
寡糖噁唑啉。此外,还介绍了一种用预定的天然 N-糖或定制的
寡糖分子重塑岩藻糖基化糖蛋白或岩藻糖基化糖肽的相关方法,以及一种重塑
抗体以包括预定糖链来取代异构糖链的方法。