食品科学 ›› 2007, Vol. 28 ›› Issue (8): 247-249.

• 生物工程 • 上一篇    下一篇

南瓜多糖复合酶法提取及纯化的研究

 王洪伟, 崔崇士, 徐雅琴   

  1. 东北农业大学; 东北农业大学 黑龙江哈尔滨150030; 黑龙江哈尔滨150030;
  • 出版日期:2007-08-15 发布日期:2011-10-24

Study on Extraction of Pumpkin Polysaccharide with Complex Enzymes and Its Purification

 WANG  Hong-Wei, CUI  Chong-Shi, XU  Ya-Qin   

  1. Northeast Agricultural University, Harbin 150030, China
  • Online:2007-08-15 Published:2011-10-24

摘要: 南瓜中的有效成分南瓜多糖对糖尿病症状有显著的治疗效果,为了开发和利用这一功能成分,本实验采用酶解的方法提取南瓜多糖。首先利用正交试验确定复合酶添加量为纤维素酶1%,果胶酶1.5%,木瓜蛋白酶1%;利用正交试验确定复合酶的最佳反应条件为温度40℃,pH值为5.5,反应时间为30min。在最佳条件下,多糖的提取率为28.8%。将复合酶法制得的南瓜粗多糖经脱色、透析后,上DEAE-纤维素柱层析,得到三种级分。主要级分PPIII经SepharoseCL-4B凝胶柱层析、紫外扫描和冻融分析鉴定为均一组分。

关键词: 南瓜多糖, 提取纯化, 复合酶

Abstract: In this study, enzymolysis was adopted to extract pumpkin polysaccharide with obvious treatment effects on diabetes. The adding rate of cellulase 1%, pectinase 1.5% and papain 1% respe ctively is optimal through orthogonal tests. Temperature 40 ℃, pH4.5 and extraction time 30 min are optimal conditions for complex enzymes extraction through orthogonal tests. Under these optimum conditions the extraction rate of pumpkin polysaccharide reaches 28.8%. Three fractions(PP I, PP II, PP III) are identified from the purified pumpkin polysaccharide by DEAE-cellulose chromatography. Sepharose CL-4B gel filtration, ultraviolet spectrometry and freeze-thawing assays show that PPIII is purified.

Key words: pumpkin polysaccharide, extraction and purification, complex enzymes