-L-rhamnopyranoside. Disaccharides were obtained with yields going up to 64%. The structural diversity generated as well as the obtained yields appear to be related to enzyme active site architecture, which can be modulated and improved by enzyme engineering. Several of the obtained disaccharides enter in the composition of surface polysaccharides of pathogenic bacteria, among which is Shigella flexneri. Our results
使用来自糖苷
水解酶家族70和13的
重组葡聚糖蔗糖,使用
蔗糖作为
葡糖基供体和
N-乙酰基-D-葡糖胺,
L-鼠李糖或甲基α-
L-鼠李糖吡喃糖苷作为受体进行转
葡糖基化反应。根据酶的特异性,合成并表征了各种
碳水化合物结构,包括α-
D-吡喃葡萄糖基-(1→6)-N-乙酰基-
D-葡萄糖胺,α-
D-吡喃葡萄糖基-(1→4)-N-乙酰基-
D-葡萄糖胺,α-
D-吡喃葡萄糖基-(1→1)-β-
L-鼠李糖吡喃糖苷,α-
D-吡喃葡萄糖基-(1→4)-α-
D-吡喃葡萄糖基-(1→1)-β -L-鼠李
吡喃糖苷,甲基α-
D-吡喃葡萄糖基-(1→4)-α-
L-鼠李糖吡喃糖苷和甲基α-
D-吡喃葡萄糖基-(1→3)-α-
L-鼠李糖吡喃糖苷。获得了
双糖,产率高达64%。产生的结构多样性以及获得的产率似乎与酶活性位点结构有关,其可以通过酶工程来调节和改善。所获得的二糖中的几种进入病原细菌的表面
多糖的组成,其中包括弗氏志贺氏菌。 我