NMR Analysis of Polysaccharide ASP3 from Angelica sinensis (Oliv.) Diels and It's Hydrolysis Products

文献类型： 外文期刊

第一作者： Sun Yuan-Lin

作者： Sun Yuan-Lin;Shan Fang;Cui Wu-Wei;Tang Jian;Gu Xiao-Hong

作者机构：

关键词： Angelica sinensis;Pectic polysaccharide;Partial acid hydrolysis;Enzymic digestion;NMR

期刊名称：CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE （ 影响因子：0.65； 五年影响因子：0.481 ）

ISSN： 0251-0790

年卷期： 2009 年 30 卷 9 期

页码：

收录情况： SCI

摘要： The structural features of polysaccharide ASP3 were studied. ASP3 was hydrolyzed with 0.2 mol/L trifluoroacetic acid and was enzymic hydrolyzed with endo-alpha-(1 -> 4)-polygalacturonases. NMR analysis method was conducted on the samples. The results indicated that ASP3 was a kind of pectic polysaccharide which contained the main part of homogalacturonan fragments as "smooth regions" with alpha-(1 -> 4)-GalpA, ant rhamnogalacturonan segments as "hairy regions" backbone. Gal and Ara, which were the mainly constitution of the branch, substituted at O4 position of Rhap residues in the backbone. Man and Glc were linked as arabinogalactan, galactan and arabinan. Terminal, beta-(1 -> 3)-, beta-(1 -> 3, 6)-, beta-(1 -> 4)-, and beta-(1 -> 4, 6)-Galp as well as residues of terminal, alpha-(1 -> 5)-, and alpha-(1 -> 3, 5)-Araf were linked to forth beta-(1 -> 6)- or beta-(1 -> 4)-galactans bearing 3, 6- or 4,6-substituted beta-Galp residues as branched points respectively, and short alpha-(1 -> 5)-arabinan possessing 3, 5-substituted alpha-Ara residues as branched points. In addition, arabinogalactan was found to contain branched sugar chains of alpha-(1 -> 5)-arabinan attached to the linear chains of beta-(1 -> 6)-galactan by 1,3-linkages.

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