yields up to 65%, has been achieved by utilizing the transglycosylation activity of Agrobacterium sp. β-glucosidase (EC 3.2.1.21). The regioselectivity of the glycosylation reaction was investigated using p -nitrophenyl β- d -galactopyranoside, β- d -mannopyranosyl fluoride and d -glucal as glycosyl donors and a series of phenyl 1-thio-, benzyl 1-thio-, and benzyl β- d -glycopyranosides as glycosyl acceptors
摘要利用土壤杆菌属(Agrobacterium sp。)的转糖基化活性已经实现了几种
寡糖的合成,收率高达65%。β-
葡萄糖苷酶(
EC 3.2.1.21)。使用对
硝基苯基β-d-
吡喃半
乳糖苷,β-d-甘露
吡喃糖基
氟化物和d-
葡萄糖醛作为糖基供体以及一系列苯基1-
硫代,苄基1-
硫代和苄基β研究了糖基化反应的区域选择性-d-糖
吡喃糖苷作为糖基受体。确定分离出的产物对于所有糖基受体均含有β-(1→3)和/或β-(1→4)糖苷键的混合物,但β-d-半
乳糖构型受体除外,其中β-的混合物为-观察到(1→3)和β-(1→6)键。