高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (12): 2728.doi: 10.7503/cjcu20130382

• 有机化学 • 上一篇    下一篇

大粒车前子多糖组分PLP-1的结构表征

殷军艺, 李昌, 聂少平, 谢明勇   

  1. 南昌大学食品科学与技术国家重点实验室, 南昌 330047
  • 收稿日期:2013-04-25 出版日期:2013-12-10 发布日期:2013-06-13
  • 作者简介:谢明勇,男,博士,教授,博士生导师,主要从事食品化学和营养学研究. E-mail:myxie@ncu.edu.cn
  • 基金资助:

    国家“八六三”计划项目(批准号:2013AA102102);“十二五”国家科技支撑计划项目(批准号:2012BAD33B06);国家自然科学基金重点项目(批准号:31130041)和国家自然科学基金(批准号:21062012)资助.

Structural Characterization of Purified Polysaccharide Fraction(PLP-1) from the Seeds of Plantago asiatica L.

YIN Jun-Yi, LI Chang, NIE Shao-Ping, XIE Ming-Yong   

  1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Received:2013-04-25 Online:2013-12-10 Published:2013-06-13

摘要:

研究了由大粒车前子多糖分离纯化所得组分PLP-1的一级精细结构特征. 通过单糖组成分析、部分酸水解及甲基化分析,并结合NMR,GC和GC-MS等技术测定了PLP-1的一级结构. 结果表明,PLP-1由Ara(33.98%),Xyl(58.23%),Rha(2.36%),Glc(2.23%),Gal(2.36%)和Man(0.83%)组成,糖醛酸以GlcA形式存在. PLP-1中主要糖残基有α-T-linked Araf(9.58%),β-T-linked Xylp(8.71%),α-1,3-linked Araf(18.22%),β-1,3-linked Xylp(8.05%),β-1,4-linked Xylp(5.85%),β-1,2,4-linked Xylp(16.98%)和β-1,3,4-linked Xylp(27.52%),GlcA以α-T-linked GlcAp形式存在;此外还有1,2-linked Rhap,T-linked Glcp,1,6-linked Glcp,T-linked Galp,1,3-linked Galp和1,3,6-linked Galp等少量其它残基. 根据所得结果推断出PLP-1可能的一级结构.

关键词: 大粒车前子, 多糖, 一级结构, 甲基化

Abstract:

Polysaccharide's biological activities are related to their structure. Previous studies showed that the polysaccharide from seeds of Plantago asiatica L. had good bioactivities, and two fractions from the crude polysaccharide were characterized. This work aimed at investigating primary structure of another fraction, PLP-1. The methods, including monosaccharide compositions analysis, partial acid hydrolysis, nuclear magnetic resonance(NMR), gas chromatography(GC) and gas chromatography-mass spectroscopy(GC-MS), were applied for structural characterization. The results showed that PLP-1 was composed of Ara(33.98%), Xyl(58.23%), Rha(2.36%), Glc(2.23%), Gal(2.36%) and Man(0.83%). Its main uronic acid was GlcA. The majority residues were α-T-linked Araf(9.58%), β-T-linked Xylp(8.71%), α-1,3-linked Araf(18.22%), β-1,3-linked Xylp(8.05%), β-1,4-linked Xylp(5.85%), β-1,2,4-linked Xylp(16.98%) and β-1,3,4-linked Xylp(27.52%). GlcA was existed as α-T-linked GlcAp. There were other residues, including 1,2-linked Rhap, T-linked Glcp, 1,6-linked Glcp, T-linked Galp, 1,3-linked Galp and 1,3,6-linked Galp, etc. Finally, primary structure of PLP-1 was proposed.

Key words: Seeds of Plantago asiatica L., Polysaccharide, Primary Structure, Methylation

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