The benzyl-protected disaccharide building blocks of core 8 O-glycan (15a/15b) for glycopeptide were stereoselectively synthesized by two glycosidation reactions with the glycosyl fluoride method. The building blocks were utilized in the solid-phase synthesis of a glycopeptide carrying two O-glycans with the consensus sequence of the tandem-repeat domain of MUC5AC. The synthetic glycopeptide was detached from the resin with reagent K, and subsequent debenzylation under conditions of low-acidity TfOH afforded glycopeptide 2. The synthetic sample will be used as a suitable standard in studies of the physicochemical or immunochemical characterization of mucin glycoforms.
利用糖基化
氟化物方法,通过两个糖苷化反应立体选择性地合成了用于糖肽的核心 8 O-聚糖(15a/15b)的苄基保护二糖构件。利用这些构件固相合成了含有两个 O-聚糖的糖肽,其序列与 MUC5AC 的串联重复结构域的共识序列一致。合成的糖肽用试剂 K 从
树脂中分离出来,随后在低酸 TfOH 条件下进行脱苄基反应,得到糖肽 2。该合成样本将在粘
蛋白糖形的物理
化学或免疫
化学表征研究中用作合适的标准。