Development of Glyco-medicines Using Mutant Enzyme of Microbial Endoglycosidase and Establishment of Its Preparation Method

点击翻译按钮获取中文摘要

The endo-β-N-acetylglucosaminidase from Mucor hiemalis isolated from soil sample is unique in that it can transfer en bloc the oligosaccharide of glycoproteins onto different acceptors, and thereby it enzymatically generates diverse glycoconjugates. We performed mutational studies to obtain the mutant of the enzyme which had significantly diminished hydrolysis activity but had a high transglycosylation activity. We have found that some mutant could efficiently exhibit transglycosylation activity using synthetic sugar oxazoline. Therefore, we used the mutant enzyme to synthesize an efficient binding inhibitor for influenza virus, which is composed of sialyloligosaccharides on chitosan. This compound showed sufficient inhibitory activity against influenza virus infection.