食品科学 ›› 2011, Vol. 32 ›› Issue (23): 206-209.doi: 10.7506/spkx1002-6630-201123041

• 生物工程 • 上一篇    下一篇

越桔叶超氧化物歧化酶的分离纯化与定性研究

贺 阳,文连奎*,路 鑫,蒋海芹,李倩倩   

  1. 吉林农业大学食品科学与工程学院
  • 出版日期:2011-12-15 发布日期:2011-12-21

Purification and Characterization of Superoxide Dismutase from Blueberry Leaves

HE Yang,WEN Lian-kui*,LU Xin,JIANG Hai-qin,LI Qian-qian   

  1. (College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China)
  • Online:2011-12-15 Published:2011-12-21

摘要: 采用超声波辅助提取越橘叶超氧化物歧化酶得粗酶液,经选择性热变性、Sephadex G-75柱层析、透析、冷冻干燥,得到纯度较高的越橘叶超氧化物歧化酶。聚丙烯酰胺凝胶电泳显示在32kD和42kD左右有2条清晰条带;紫外-可见光谱扫描在波长258nm和280nm处有吸收峰;原子吸收光谱也测定出越橘叶超氧化物歧化酶中含有铁、锰、锌离子。结果表明越橘叶超氧化物歧化酶有3种类型:Fe-SOD、Mn-SOD和Cu/Zn-SOD。

关键词: 越桔叶, 超氧化物歧化酶, 分离纯化, 性质鉴定

Abstract: Superoxide dismutase (SOD) was extracted from blueberry leaves with phosphate buffered saline (PBS), and then purified sequentially by selective thermal denaturation, dialysis, and Sephadex G-75 column chromatography. Purified protein with high SOD activity was finally lyophilized. The SDS-PSGE of purified protein showed two bands at 32 kD and 42 kD, respectively. UV scanning showed that the enzyme had two absorption peaks at 258 nm and 280 nm, respectively. Atomic absorption indicated that the enzyme contained Zn, Mn, and Fe. In summary, blueberry leaves contain three different types of SOD: Fe-SOD, Mn-SOD, and Cu/Zn-SOD.

Key words: blueberry leaves, superoxide dismutase, purification, characterization

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