天然产物研究与开发 ›› 2010, Vol. 23 ›› Issue (6): 1053-1056.

• 研究简报 • 上一篇    下一篇

人参糖肽PG-g的分离纯化与结构分析

王 颖1,高其品2,李桂荣3,陈英红4,姜瑞芝4*   

  1. 1华南理工大学轻工与食品学院,广州510640;2长春中医药大学新药研发中心,长春130061; 3延边大学药学院,延吉133000;4吉林省中医药科学院,长春130021
  • 收稿日期:2009-07-21 出版日期:2011-01-10 发布日期:2011-10-19
  • 通讯作者: zhongyanjrz@yahoo.com.cn
  • 基金资助:

    国家科技支撑计划( 2007BA138B00)

Isolation, Purification and Structural Analysis of PG-g from Panax ginseng

WANG Ying1,GAO Qi-pin2,LI Gui-rong3,CHEN Ying-hong4,JIANG Rui-zhi4*   

  1. 1College of Light Industry and Food, South China University of Technology, Guangzhou 510641, China; 2Center for New Medicine Research, Changchun University of Chinese Medicine, Changchun 130117, China; 3School of Pharmacy, Yanbian University, Yanji 133000, China; 4Academy of Chinese Medicine and Material Medica of Jilin Province, Changchun 130021, China

  • Received:2009-07-21 Online:2011-01-10 Published:2011-10-19

摘要:

本研究以人参根水提物为原料,通过超滤得超滤液,超滤液浓缩后进行活性炭柱分离纯化,分别以水、5%、30%、60%和95%乙醇洗脱。理化性质测定结果显示30%乙醇洗脱组份(PGO)含糖量最高,同时含有蛋白质。PGO通过Sephadex G-15及DEAE-Sephadex A-50纯化得到糖肽PG-g,其由Ara、GlcA和GalA组成。甲基化分析结果表明PG-g以GlcA与GalA为非还原末端,以(1→3)-连接的GalA和(1→6)-连接的GlcA为主链,分别在GlcA的C3位与GalA的C6位存在分支点,同时还存在(1→2,4)-连接的Ara。糖与肽之间通过Ara-Hyp糖苷键连接在一起。PG-g含有14种氨基酸,以Cys和Tyr含量最高。

关键词: 人参, 糖肽, 结构, 甲基化

Abstract:

In this paper, the aqueous extract of P. ginseng root was taken as experiment material. It was forced through Cellulose Super Filtration Systerm to obtain the ultrafiltrate. The ultrafiltrate was loaded onto a Carbon-Celite column and fractionated into five parts by eluting with water, 5%, 30%, 60%, and 95% ethanol. Chemical analysis of the five fractions showed that the carbohydrate content of 30% ethanol elution (PGO) was the highest. Then PG-g was obtained from PGO which was purified by using Sephadex G-15 and DEAE-Sephadex A-50 chromatography. The PG-g was composed of Ara, GalA, and GlcA. Methylation analysis showed that GlcA and GalA were the non-reducing termination, (1→3)-linked GalA and (1→6)-linked GlaA were the backbone, C3 of GlcA and C6 of GalA existed branch chain, and also existed (1→2,4)-linked Ara. Peptide was glycosidically linked through hydroxyprolinyl arabinosides. And PG-g contained 14 kinds of amino acid, of which Cys and Tyr were the the most abundant amino acid.

Key words: Panax ginseng, glycopeptide, structure, methylation