华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (9): 59-62.

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甘薯糖蛋白的分离、纯化和结构分析

李亚娜 林永成 佘志刚   

  1. 中山大学 化学博士后流动站‚广东 广州510275
  • 收稿日期:2003-10-21 出版日期:2004-09-20 发布日期:2015-09-09
  • 通信作者: 李亚娜(1975-)‚女‚博士后‚主要从事天然产物方面的研究. E-mail:nayali@sohu.com
  • 作者简介:李亚娜(1975-)‚女‚博士后‚主要从事天然产物方面的研究.
  • 基金资助:
     渝科委应用基础研究项目(第28号(196))

Isolation, Purification and Structure Analysis of Sweet Potato Glycoprotein

Li Ya- na  Lin Yong- cheng  She Zhi- gang   

  1. Chemistry Postdoctor‚Sun Yat -sen Univ.‚Guangzhou510275‚Guangdong‚China
  • Received:2003-10-21 Online:2004-09-20 Published:2015-09-09
  • Contact: 李亚娜(1975-)‚女‚博士后‚主要从事天然产物方面的研究 E-mail:nayali@sohu.com
  • About author:李亚娜(1975-)‚女‚博士后‚主要从事天然产物方面的研究

摘要: 采用二乙基氨基乙基52和葡聚糖凝胶 G100柱层析法‚从甘薯中分离纯化甘薯糖蛋白‚并对其进行结构分析.用 SDS-聚丙烯酰胺凝胶电泳检验纯度和分子质量;根据β-消除反应判断糖肽键的连接方式;利用气相色谱法分析单糖组成;通过红外光谱推断糖苷键类型.研究结果表明‚甘薯糖蛋白是以共价键连接而成的结合蛋白‚呈白色粉末状‚易溶于水‚分子质量约为62ku‚属 O-连接方式‚含有β-糖苷键和典型酰胺羰基结构‚蛋白质含量为12.01%‚糖链部分含有岩藻糖、阿拉伯糖、甘露糖、葡萄糖和半乳糖.

关键词: 甘薯糖蛋白, 分离, 纯化, 结构分析

Abstract:  By using DEAE-52 cellulose and Sephadex G100 column chromatography‚sweet potato glycoprotein (SPG) was isolated and purified from sweet potato‚and its structure was analyzed including the determination of the purity and molecular mass of SPG by SDS-PAGE‚the identification of the linkage mode of glycopeptide bond by β-erase reaction‚the analysis of monose composition by GLC‚and the deduction of the linkage type of glycosidic bond by IR spectra.The results indicate that SPG is a kind of conjugated protein with covalent bond‚takes on white solid powder and is easily dissolved in water‚with a molecular mass of62ku and an O-linkage.It is also indicated that there areβ-glycosidic bonds and typical amido-carbonyl groups in SPG containing12.01% protein (mass fraction)‚and that SPG saccharide chain is composed of fucose‚arabinose‚mannose‚glucose and galactose.

Key words:  sweet potato glycoprotein, isolation, purification, structure analysis

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