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Chemoenzymatic Synthesis of Sialyl-Trimeric-Lewis X

机译:化学酶法合成唾液酸三聚体-刘易斯X

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摘要

The decasaccharide sialyl-trimeric-Lewis x is a compoment of glycoproteins and glycolipids that serve as E-and P-selectin ligands. The synthesis of this target structure was accomplished by utilizing a combination of chemical and enzymatic methods. Highlights of the chemical synthesis include minimal use of protecting groups and regioselective glycosyltions to arrive at a linear tri-lactosamine sturcutre. Glycosyltransferase-catalyzed reactions were then empolyed for the addition of the terminal sialic acid branch-point fucose residues. Notably, fucosyltransferases V and VI showed different specificities for the sialyl-tri-lactors-amine core structure.
机译:十糖唾液酸基三聚体-Lewis x是糖蛋白和糖脂的混合物,可作为E-和P-选择素配体。该靶结构的合成通过利用化学和酶促方法的组合来完成。化学合成的重点包括极少使用保护基和区域选择性糖基化反应,以形成线性的三乳糖胺骨架。然后用糖基转移酶催化的反应进行末端唾液酸分支点岩藻糖残基的添加。值得注意的是,岩藻糖基转移酶V和VI对唾液酸三酯胺结构的特异性不同。

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