Combined Application of Galactose Oxidase and β-N-Acetylhexosaminidase in the Synthesis of Complex ImmunoactiveN-Acetyl-D-galactosaminides
作者:Pavla Fialová、Darius-Jean Namdjou、Rüdiger Ettrich、Věra Přikrylová、Jana Rauvolfová、Karel Křenek、Marek Kuzma、Lothar Elling、Karel Bezouška、Vladimír Křen
DOI:10.1002/adsc.200505041
日期:2005.6
were accepted. Molecular modelling with docking into the active centre of the β-N-acetylhexosaminidase from Aspergillus oryzae revealed that the aldehyde 2 is processed as a C-6 geminal diol by the enzyme. The aldehyde 2 was tested for transglycosylation reactions using GlcNAc as an acceptor. The β-N-acetylhexosaminidase from Talaromyces flavus gave the best yields (37%) of the transglycosylation product
开发了一种高产率的制备方法,用于在间歇式反应器中使用Dactylium dendroides的半乳糖氧化酶合成对-硝基苯基2-乙酰氨基-2-脱氧-β-D-半乳糖-己二醛-1,5-吡喃糖苷(2)。。使用一组36种真菌的β- N-乙酰基己糖胺酶,分别来自Acremonium,Aspergillus,Penicillium和Talaromyces属,研究了该醛和通过NaClO 2氧化获得的相应的糖醛酸3的酶促识别。醛2易于被所有测试的β- N-乙酰基己糖胺酶水解,但两种糖醛酸均不易水解3或它的甲酯4都不被接受。与对接成β-的活性中心分子建模ñ从-acetylhexosaminidase米曲霉,发现该醛2被处理为C-6偕通过酶二醇。使用GlcNAc作为受体测试醛2的转糖基化反应。黄萎病菌的β- N-乙酰基己糖胺酶的转糖基化产物2-乙酰氨基-2-脱氧-β-D-半乳糖-己二醛-1,5-吡喃糖基-(14