Use of human-milk fucosyltransferase in the chemoenzymic synthesis of analogues of the sialyl Lewis and sialyl Lewis tetrasaccharides modified at the C-2 position of the reducing unit
作者:Pandurang V. Nikrad、Mohammed A. Kashem、Kenneth B. Wlasichuk、Gordon Alton、Andre P. Venot
DOI:10.1016/0008-6215(93)84162-y
日期:1993.12
2-deoxy substituent Z is azido, amino, propionamido, or acetamido, were prepared by chemical synthesis. Both types of modified trisaccharides are acceptors for a fucosyltransferase preparation obtained from human milk. Preparative fucosylations using this enzyme provided analogues of the sialyl Lewis(x) and sialyl Lewis(a) tetrasaccharide structures, which have been proposed to be ligands for cell-adhesion
两个系列的三糖,具有式α-Neu5Ac-(2-> 3)-β-D-Gal-(1→4)-β-D-GlcZ-OR和α-Neu5Ac-(2-- > 3)-β-D-Gal-(1-> 3)-β-D-GlcZ-OR[R =(CH2)8CO2CH3],其中2-脱氧取代基Z为叠氮基,氨基,丙酰胺基,或乙酰氨基,是通过化学合成制备的。两种类型的修饰的三糖都是获自人乳的岩藻糖基转移酶制剂的受体。使用该酶进行的岩藻糖基化制备提供了唾液酸化的Lewis(x)和唾液酸化的Lewis(a)四糖结构的类似物,它们被认为是细胞粘附分子的配体。这些合成进一步证明了糖基转移酶在寡糖类似物的制备中的用途。