食品科学 ›› 2011, Vol. 32 ›› Issue (1 ): 31-34.doi: 10.7506/spkx1002-6630-201101008

• 基础研究 • 上一篇    下一篇

裸燕麦球蛋白的分离纯化及其抗氧化活性研究

蔺 瑞,张美莉﹡,张家超   

  1. 内蒙古农业大学食品科学与工程学院
  • 收稿日期:2010-04-23 出版日期:2011-01-15 发布日期:2010-12-28
  • 通讯作者: 张美莉 E-mail:zhangmeili22@sina.com
  • 基金资助:

    国家现代农业(燕麦)产业技术体系建设专项(nycytx-014);教育部留学回国人员科研启动基金项目

Purification and Antioxidant Activity of Globulins from Naked Oat Seeds

LIN Rui,ZHANG Mei-li*,ZHANG Jia-chao   

  1. College of Food Science and Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
  • Received:2010-04-23 Online:2011-01-15 Published:2010-12-28
  • Contact: ZHANG Mei-li E-mail:zhangmeili22@sina.com

摘要:

采用Osborne 法提取裸燕麦球蛋白,利用盐析、SephadexG-100 凝胶过滤层析、SDS-PAGE 电泳等方法进一步纯化,并对各球蛋白组分进行抗氧化能力的研究。结果表明:裸燕麦球蛋白的硫酸铵饱和度为60%。在柱层析分离条件下(洗脱速度为3~7mL/10min,缓冲溶液为蒸馏水),得到的组分I 分子质量范围分布在44、34~29、25kD,组分II 分子质量范围分布在25、23、19kD。组分I 清除3 种自由基的作用较强, 清除·OH、O2·、DPPH 自由基的IC50 分别为 3.73、0.016、1.033mg/mL,其中对O2·清除能力大于VC 对O2·的清除能力。组分II 清除3 种自由基能力均低于分离组分I、盐析后球蛋白和球蛋白粗提物。

关键词: 裸燕麦, 球蛋白, 纯化, 抗氧化

Abstract:

A crude globulin extract from naked oat seeds was prepared by Osborne method and purified by salting-out and Sephadex G-100 gel filtration chromatography, and the crude extract was separated into two fractions (I and II). The crude globulin extract, its salting-out purification product and fractions I and II were subjected to SDS-PAGE analysis and antioxidant activity evaluation. Oat seed globulins exhibited 60% degree of saturation with ammonium sulphate. The molecular weight distribution of fraction I consisted of 44, 34 - 29kD and25 kD, and that of fraction I was 25, 23, 19 kD. Among the four materials, fraction I had the strongest scavenging effect on hydroxyl, superoxide anion and DPPH free radicals, with IC50 values of 3.73, 0.016 mg/mL and 1.033 mg/mL, respectively, and its hydroxyl free radical scavenging effect was higher than that of VC. However, the free radical scavenging effect of fraction II was lower than those of all three other materials.

Key words: naked oat, globulin, purification, antioxidant

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