酶法合成Levan多糖的过程调控与机理研究

摘要

Levan, an extracellular polysaccharide, is composed of β-2,6 glycosidic linkage in the main chain and β-2,1 glycosidic linkage in the branch.Due to the promising physiological effects of prebiotics, reducing blood fat and anticancer, Levan exhibits great potential in food and pharmaceutical industries.Summarize the preparation methods of Levan polysaccharide, process control and mechanism analysis of Levan polysaccharide by enzymatic synthesis.Meanwhile,the existing problems in the process of enzymatic synthesis are discussed and the orientation of further research of Levan polysaccharide by enzymatic synthesis is prospected in the future.%Levan是一种主链由大量呋喃果糖基团以β-(2,6)糖苷键连接,少量支链以β-(2,1)糖苷键连接的胞外多糖.作为一种功能性多糖,Levan具有益生元、降血脂及抗肿瘤等重要的生理功能,在医药和食品行业具有巨大应用前景.就Levan多糖的制备方法、酶法合成Levan多糖的机理研究及过程调控几方面进行了综述,对酶法合成Levan多糖中存在的问题进行了分析和讨论,对未来酶法合成Levan多糖的研究方向进行了展望.