食品科学 ›› 2010, Vol. 31 ›› Issue (17): 120-123.doi: 10.7506/spkx1002-6630-201017027

• 基础研究 • 上一篇    下一篇

白芨多糖BSPI-A的分离纯化及结构研究

王 博,徐 莎,黄琳娟,王仲孚*   

  1. 西北大学生命科学学院,西部资源生物与现代生物技术省部共建教育部重点实验室,陕西省生物技术重点实验室,
  • 收稿日期:2009-12-28 修回日期:2010-08-03 出版日期:2010-09-15 发布日期:2010-12-29
  • 通讯作者: 王仲孚 E-mail:wangzhf@nwu.edu.cn
  • 基金资助:

    “十一五”国家科技支撑计划项目(2006BAD06B00);教育部新世纪优秀人才支持计划项目(NCET-08-0893);
    陕西省科技研究发展计划项目 [2007K16-06(3)]

Isolation, Purification and Structural Characterization of a Polysaccharide Fraction from Stem Tuber of Bletilla striata, Named BSPI-A

WANG Bo,XU Sha,HUANG Lin-juan,WANG Zhong-fu*   

  1. Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Shaanxi Provincial Key Laboratory
    of Biotechnology, College of Life Science, Northwest University, Xi an 710069, China
  • Received:2009-12-28 Revised:2010-08-03 Online:2010-09-15 Published:2010-12-29
  • Contact: WANG Zhong-fu E-mail:wangzhf@nwu.edu.cn

摘要:

从白芨[Bletilla striata (Thunb.) Reichb.f.]块茎中提取出粗多糖(crude Bletilla striata polysaccharide,CBSP),然后经DEAE-cellulose 柱层析分离得到BSPI、BSPII 两个多糖组分。BSPI 过Bio-Gel P-300 柱层析纯化后得到组分BSPI-A。高效凝胶渗透色谱法(HPGPC)测得BSPI-A 的分子质量大于4.0 × 105D。经IR、GC、GC-MS、甲基化等方法对该多糖的结构进行表征。结果表明:BSPI-A 为直链多糖,主要由β(1,4)甘露糖和β(1,4)葡萄糖组成,其物质的量比为8.09:1。

关键词: 白芨, 多糖, 分离纯化, 结构解析

Abstract:

The crude polysaccharide extract, named CBSP, from the stem tubers of Bletilla striata was purified/fractionated by DEAE-cellulose column chromatography, and two fractions were obtained and they were named BSPI and BSPII. BSPI was further purified by Bio-Gel P-300 column chromatography, and a sub-fraction was obtained and it was named BSPI-A. HPGPC analysis showed that the molecular weigh of BSPI-A was more than 4.0 × 105 D. By means of IR spectroscopy, gas chromatography (GC), GC coupled to mass spectrometry (GC-MS) and methylation analysis, the polysaccharide fraction was characterized structurally, and the results indicated that BSPI-A was a linear polysaccharide and that the backbone was composed of 1,4-linked mannose (Man) and 1,4-linked glucose (Glc), with a molar ratio of 8.09:1.

Key words: Bletilla striata, polysaccharide, isolation and purification, structural characterization

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