食品科学 ›› 2009, Vol. 30 ›› Issue (15): 104-108.doi: 10.7506/spkx1002-6630-200915023

• 基础研究 • 上一篇    下一篇

羊肚菌水溶性多糖PMEP-1的分离纯化与结构特征分析

明 建1,2,曾凯芳1,2,赵国华1,2,吴素蕊3,桂明英3,陈宗道1,2,*   

  1. 1. 西南大学食品科学学院 2. 重庆市特色食品工程技术研究中心 3. 昆明食用菌研究所
  • 收稿日期:2009-03-25 修回日期:2009-06-17 出版日期:2009-08-01 发布日期:2010-12-29
  • 通讯作者: 陈宗道 E-mail:chenzd@swu.edu.cn
  • 基金资助:

    西南大学博士基金项目(SWU109005);云南省省校省院科技合作支持项目(2005YX24)

Isolation, Purification and Structural Characteristics of Water Soluble Polysaccharide PMEP-1 from Morchella esculenta (L.) Pers.

MING Jian1,2,ZENG Kai-fang1,2,ZHAO Guo-hua1,2,WU Su-rui3,GUI Ming-ying3,CHEN Zong-dao1,2,*   

  1. 1. College of Food Science, Southwest University, Chongqing 400715, China;
    2. Chongqing Special Food Programme and Technology Research Center, Chongqing 400715, China;
    3. Kunming Research Insitute of Edible Mushroom, Kunming 650223, China
  • Received:2009-03-25 Revised:2009-06-17 Online:2009-08-01 Published:2010-12-29
  • Contact: CHEN Zong-dao E-mail:chenzd@swu.edu.cn

摘要:

羊肚菌多糖分别经热水浸提、Sevag 法脱蛋白、透析、乙醇沉淀、DEAE-52 纤维素层析和Sephadex G-100 凝胶层析等分离纯化过程,得到羊肚菌多糖组分PMEP-1,经鉴定PMEP-1 为均一组分,得率为1.58%,相对分子质量43600,旋光度[α]22D 为+257.0(C=0.001,H2O)。采用多糖化学结构分析的化学方法(部酸水解、甲基化分析、高碘酸氧化、Smith 降解)和现代仪器分析方法(红外光谱、GC-MS、1H 和13C 核磁共振)对PMEP-1 进行全面结构特征分析,结果发现:PMEP-1 是由阿拉伯糖、甘露糖、葡萄糖、半乳糖(摩尔比为1:2.37: 4.79:3.09)构成,以α-1,4- 葡萄糖残基、α-1,6- 半乳糖残基、α-1,2- 甘露糖残基及α-1,5- 阿拉伯糖残基为主要连接,同时含有α-1,2,6- 甘露糖分支、α-1,4,6- 葡萄糖分支和β-1,2,6- 半乳糖分支的高度分支杂多糖。

关键词: 羊肚菌, 多糖, 分离纯化, 结构分析

Abstract:

The polysaccharide PMEP-1 was isolated from Morchella esculenta (L.) Pers. through hot-water extraction and subjected to Sevag deprotein, dialysis, ethanol precipitation, DEAE-52 cellulose ion-exchange column chromatographic analysis and Sephadex G-100 column chromatographic analysis. This polysaccharide was found to be highly homogeneous with a relative molecular mass of 43600 and a specific rotation of +257.0 (C = 0.001, H2O) and the yield reached 1.58%. The chemical structure of PMEP-1 was analyzed by chemical methods (including partial hydrolysis with acid, methylation reaction, periodate oxidation, and Smith degradation) and instrument analysis methods (using IR, GC-MS, 1H-NMR, and 13C-NMR). The polysaccharide PMEP-1 was found to be composed of Ara, Man, Glc and Gal with a molar ratio of 1: 2.37: 4.79: 3.09 and be a complex heteropolysaccharide with highly ramified structure, whose main chain was formed by a mixing linkage of α-1,4-glucose, α-1, 6-galactose, α-1,2-mannose and α-1,5-arabose and whose side chains were attached at α-1,2,6-mannose, α-1,4,6-glucose and α-1,2,6-galactose.

Key words: Morchella esculenta (L.) Pers, polysaccharide, isolation and purification, structural analysis

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