波谱学杂志 ›› 2006, Vol. 23 ›› Issue (4): 419-428.

• 研究论文 •    下一篇

二维核磁共振对羊栖菜褐藻糖胶DJL的结构研究

李波*; 芦菲; 魏新军   

  1. (河南科技学院 食品学院,河南 新乡 453003)
  • 收稿日期:2006-03-01 修回日期:2006-04-12 出版日期:2006-12-05 发布日期:2009-12-05
  • 通讯作者: 李波

Structure Elucidation of Fucoidan DJL Originated from Hizikia fusiforme by 2D NMR

LI Bo*; LU Fei; WEI Xin-jun   

  1. (Food School, Henan Institute of Science and Technology, Xinxiang 453003, China)
  • Received:2006-03-01 Revised:2006-04-12 Online:2006-12-05 Published:2009-12-05
  • Contact: Li Bo

摘要: 羊栖菜是我国的特色海藻,褐藻糖胶是其主要生物活性成分. 葡萄糖醛酸甘露聚糖(DJL)是羊栖菜褐藻糖胶经脱硫和部分酸水解后的产物,本文采用2D NMR和甲基化分析等方法,对DJL的结构进行了研究. 结果显示,DJL主要由甘露糖(46.4%)和葡萄糖醛酸(50.5%)组成, 另外还含有少量的半乳糖,相对分子质量为11 KDa,其可能具有的一种结构为:β-D-GlcA-1→ [2)-α-D-Man(1→4)-β-D-GlcA(1→]n1→4)-β-D-Gal(1→[4)-β-D-GlcA(1→2)-α-D-Man(1→]n2→4)-β-D-GlcA(1→2)-α-D-Man.

关键词: 结构, NMR, 2D NMR, 羊栖菜, 褐藻糖胶, 多糖

Abstract: Fucoidan is the primary bio-active component in Hizikia fusiforme, an algae widely distributed in China. DJL is a product of Hizikia fusiforme-originated fucoidan after desulfation and partial hydrolysis. In this study, the structure of DJL was elucidated using 2D NMR spectroscopy and methylation analysis. The result shows that DJL has a molecular weight of 11 KDa and is composed of mannose (Man) and glucouronic acid (GlcA) with a composition ratio of about 1∶1. Its possible structure was also determined to be β-D-GlcA(1→ [2)-α-D-Man(1→4)-β-D-GlcA(1→]n1→4)-β-D-Gal(1→[4)-β-D-GlcA(1→2)-α-D-Man(1→]n2→4)-β-D-GlcA(1→2)-α-D-Man.

Key words: NMR, structure, Hizikia fusiforme, fucoidan, polysaccharide

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