食品科学

• 基础研究 • 上一篇    下一篇

虾夷马粪海胆生殖腺多糖的提取、纯化及鉴定

曹月刚,赵 君,陈泓宇,陈 宁,田 姮,何冬梅,杨静峰   

  1. 大连工业大学食品学院,国家海洋食品工程技术研究中心,辽宁 大连 116034
  • 出版日期:2014-11-15 发布日期:2014-11-06

Extraction, Purification and Identification of Polysaccharide from the Gonad of the Sea Urchin Strongylocentrotus intermedius

CAO Yue-gang, ZHAO Jun, CHEN Hong-yu, CHEN Ning, TIAN Heng, HE Dong-mei, YANG Jing-feng   

  1. National Engineering Research Center of Seafood, School of Food Science and Technology,Dalian Polytechnic University, Dalian 116034, China
  • Online:2014-11-15 Published:2014-11-06

摘要:

从虾夷马粪海胆生殖腺中提取纯化出一种多聚甘露糖物质,并对其结构组成特征进行研究。以海胆生殖腺干粉为材料,采用木瓜蛋白酶酶解、乙醇醇沉、Sevag法脱蛋白等方法提取得到海胆生殖腺粗多糖。进一步以唾液淀粉酶脱除粗多糖中的糖原组分,再经过Sepharose CL-6B色谱柱分离纯化后得到均一的虾夷马粪海胆生殖腺多糖(polysaccharide from gonad of sea urchin,SUGP)。采用红外光谱、紫外光谱、高效液相色谱法对SUGP的结构特征进行研究。结果表明:SUGP为含有甘露糖的均一多糖,分子质量为4 436 D。唾液淀粉酶可以去除多糖中的所有葡萄糖成分,之后其单糖组成仅为甘露糖,说明虾夷马粪海胆生殖腺多糖结构是由多聚甘露糖与糖原相连接构成的。

关键词: 海胆生殖腺, 多糖, 多聚甘露糖, 糖原

Abstract:

A water-soluble polysaccharide (SUGP) from the gonad of the sea urchin Strongylocentrotus intermedius was
obtained and its structural characteristics were elucidated. SUGP was isolated by protease-assisted aqueous extraction,
precipitated with ethanol, deproteinized by the Sevag method, further treated with alpha-amylase for the removal of
glycogen, and finally purified with gel filtration chromatography. The structural characteristics of SUGP were determined
by IR spectroscopy, ultraviolet spectroscopy and high performance liquid chromatography. The results showed that SUGP
was a homogeneous polysaccharide with average molecular weight of 4 436 D and contained only mannose. Alpha-amylase
eliminated the glycogen present in SUGP, so that producing a purified polysaccharide composed of only mannose, indicating
that the sea urchin polysaccharide is a glucomannan that is constructed with polymanna conjugated to glycogen.

Key words: sea urchin gonad, polysaccharide, polymanna, glycogen