Subsequent Enzymatic Galactosylation and Sialylation Towards Sialylated Thomsen–Friedenreich Antigen Components
作者:Lars Kröger、Agnes Scudlo、Joachim Thiem
DOI:10.1002/adsc.200606063
日期:2006.7
by a facile synthesis of such motifs. Employing chemoenzymatic methods, several modified Galβ1-3GalNAc derivatives were synthesized. Modifications were introduced at the stage of the monomeric building blocks prior to formation of the disaccharides by means of four different β-galactosidases from bovine testes, Bacillus circulans and Xanthomonas manihotis as well as the phosphorylase from Bifidobacterium
类型Neu5Acα2-3Galβ1的唾液酸低聚糖- 3GalNAc和一系列相应的图案起到本质的重要作用,并在神经节苷脂中发现的,刘易斯I型结构和高等动物,病毒,细菌,原生动物发生的唾液酸-汤姆森- Friedenreich抗原和致病真菌。有相当大的兴趣来评估这些糖结构的重要功能,在这里,我们通过轻松合成这些基序来提出一种化学酶法。利用化学酶法,合成了几种修饰的Galβ1-3GalNAc衍生物。在形成双糖之前,通过四种不同的牛睾丸,圆形芽孢杆菌和β-半乳糖苷酶,在单体结构单元的阶段引入了修饰。Xanthomonas manihotis以及双歧双歧杆菌的磷酸化酶。最后,可以使用来自克鲁斯锥虫的重组反式唾液酸酶有效地唾液酸化修饰的二糖衍生物。