天然产物研究与开发 ›› 2015, Vol. 27 ›› Issue (3): 475-479.doi: 10.16333/j.1001-6880.2015.03.022

• 开发研究 • 上一篇    下一篇

桑叶凝集素分离纯化及抑菌活性研究

刘鹏举1,付志慧2,孙东1,关爱莹3,马镝1*   

  1. 1 沈阳农业大学生物科学技术学院,沈阳 110866;2 沈阳师范大学数学与系统科学学院,沈阳 110034;3 沈阳化工研究院有限公司 新农药创制与开发国家重点实验室,沈阳 110021
  • 出版日期:2015-03-30 发布日期:2015-04-07

Separation and Purification of Lectin from Morus alba L.and Its Antimicrobial Activity

LIU Peng-ju1,FU Zhi-hui2,SUN Dong1,GUAN Ai-ying3,MA Di1*   

  1. 1 College of Biological Technology,Shenyang Agricultural University,Shenyang 110866,China; 2 School of  Mathematics and System Science,Shenyang Normal University,Shenyang 110034,China; 3 State Key Laboratory of  the Discovery and Development of Novel Pesticide,Shenyang Research Institute of Chemical Industry Co.,Ltd.,Shenyang 110021,China
  • Online:2015-03-30 Published:2015-04-07

摘要: 采用磷酸缓冲液提取桑叶凝集素,经硫酸铵分级沉淀法初步纯化、Cellulose DE-52阴离子柱层析、CM-Sepharose Fast Flow阳离子柱层析、Sephadex G-75分子筛柱层析对其进行逐级纯化,采用牛津杯法进行抑菌活性测试。结果表明桑叶凝集素经聚丙烯酰胺凝胶电泳检测显示为单一条带,SDS聚丙烯酰胺凝胶电泳检测其亚基分子量为35.95、30.35 KD;该凝集素对供试菌具有较好的抑制作用,对绿色木霉、苹果落叶病菌、西瓜枯萎病菌及烟草黑胫病菌抑菌直径分别为20、30、15、18 mm。桑叶凝集素具有较好的抑菌活性,可为新农药创制领域提供有用的天然产物先导化合物。

关键词: 桑叶凝集素, 抑菌活性, 天然产物先导化合物

Abstract: Morus alba lectin was firstly extracted with phosphate buffer and followed by a series of purification including ammonium sulfate graded precipitation.Further separation was carried out using Cellulose DE-52 chromatography,CM-Sepharose Fast Flow chromatography and Sephadex G-75sieve chromatography.The antimicrobial activity of M.alba lectin was finally tested using Oxford Cup method.The results showed that M.alba lectin displayed a single band detected with SDS polyacrylamide gel electrophoresis method and presented as 35.95 KD and 30.35 KD molecular weight.The lectin exhibited an inhibitory effect against Trichoderma viride, Alternaria alternata f.sp.mali,watermelon fusarium wilt and Phytophthora parasitica with antibacterial circle diameter of 20,30,15 mm and 18 mm,respectively.In summary, M.alba lectin exhibited an effective antimicrobial activity and therefore can be used as an useful natural lead compound for discovering and developing novel agrochemicals.

Key words: Morus alba lectin, antimicrobial activity, natural lead compound

中图分类号: 

Q512