摘要
目的:研究罗汉果多糖SGPS2的结构。方法:利用DEAE-纤维素柱和凝胶柱(Sephadex G-200)层析分离纯化得到多糖SGPS2,通过HPLC测定相对分子质量,用甲基化分析、部分酸水解、气相色谱分析、红外光谱、核磁共振光谱等方法研究单糖组成及连接方式。结果:SGPS2的相对分子量为650 000,它由鼠李糖和葡萄糖醛酸组成,各糖残基的摩尔比为Rha:GlcA=8.24∶0.99;SGPS2由(1→2,4)Rha和(1→4)Rha构成主链,侧链由(1→2)Rha和(1→3)Rha片段组成,Rha也为末端基;GlcA在分子中是以末端GlcA和2-位取代的GlcA的形式存在。结论:罗汉果多糖SGPS2是由鼠李糖和葡萄糖醛酸组成的杂多糖。
Objective:To study the structure of the polysaccharides constituents in the fruits of Siraitia grosvenorii(Swingle) C.Jeffrey.Methods:SGPS2 was purified by DEAE-cellulose and Sephadex G-200 column chromatography,the component and structure of SGPS2 were analyzed on the basis of spectral and chemical studies by HPLC,IR analysis,partical hydrolysis with acid,methylation analysis,GC and ^13C-NMR.Results:The molecular weight of SGPS2 was 650 000.Polysaccharide was composed of L-made up of(1→2,4) linked rhamnose,(1→4) linked rhamnose residues in main chain;and(1→2) linked rhamnose,(1→3) linked rhamnose in side chains.Terminal residues attached main chain to rhamnose.Conclusion:SGPS2 was composed of rhamnose and curonic acid.
出处
《中药材》
CAS
CSCD
北大核心
2010年第3期376-379,共4页
Journal of Chinese Medicinal Materials
基金
广西科学基金资助项目(桂科基0575043)
广西教育厅科研基金资助项目(200807LX053)
广西环境工程与保护评价重点实验室资助项目(桂科能09108003)
关键词
罗汉果
多糖
结构研究
Siraitia grosvenorii(Swingle) C.Jeffrey
Polysaccharide
Structure investigation