食品科学

• 工艺技术 • 上一篇    下一篇

玉竹糖蛋白分离纯化及其体外抗氧化能力

王 艳,胡一鸿,陈秋志,尹洛毅,张雪娇,刘景顺,蒋秋情,金晨钟,陈 勇*   

  1. 湖南人文科技学院生命科学系,湖南 娄底 417000
  • 出版日期:2015-01-25 发布日期:2015-01-16
  • 通讯作者: 陈 勇
  • 基金资助:

    湖南省教育厅优秀青年项目(12B070);湖南人文科技学院优秀青年项目(2013QN01);
    2014年湖南省大学生研究性学习和创新性实验计划项目(504)

Purification of Glycoprotein from Polygonatum odoratum and Its Antioxidant Activity in vitro

WANG Yan, HU Yihong, CHEN Qiuzhi, YIN Luoyi, ZHANG Xuejiao, LIU Jingshun, JIANG Qiuqing, JIN Chenzhong, CHEN Yong*   

  1. Department of Life Sciences, Hunan University of Humanities, Science and Technology, Loudi 417000, China
  • Online:2015-01-25 Published:2015-01-16
  • Contact: CHEN Yong

摘要:

采用磷酸缓冲液浸提法提取玉竹糖蛋白粗品(Polygonatum odoratum glycoprotein,PDG),经葡聚糖凝胶G-100和刀豆凝集素A分离纯化,得到糖蛋白组分PDG1和PDG3,经高效液相色谱测定其分子质量,并检测PDG、PDG1和PDG3的体外抗氧化活性。结果表明,PDG1和PDG3的分子质量分别为186 kD和28.3 kD;玉竹糖蛋白具有一定的还原能力,对羟自由基和1,1-二苯基-2-三硝基苯肼自由基具有较强的清除作用,对脂质过氧化具有抑制作用,且在一定质量浓度范围内(1~10 mg/mL)存在剂量关系,其抗氧化能力随着玉竹糖蛋白质量浓度的增加而增强,PDG1和PDG3的抗氧化能力优于PDG。

关键词: 玉竹, 葡聚糖凝胶G-100, 刀豆凝集素A, 糖蛋白, 抗氧化

Abstract:

Crude glycoproteins (PDGs) were obtained from Polygonatum odoratum through phosphate buffer extraction.
PDGs were further purified by Sephadex G-100 gel filtration and concanavalin A affinity chromatography, and PDG1
and PDG3 were acquired. The molecular weights and antioxidant activity of these two fractions were determined. The
results showed that PDG1 and PDG3 had a molecular weight of 186 and 28.3 kD, respectively, and PDG, PDG1 and PDG3
had reducing power, strong abilities to scavenge hydroxyl radical and 1,1-diphenyl-2-picrylhydrazy (DPPH) radical and
inhibitory effects against lipid peroxidation, showing a dose-effect relationship in the range of 1–10 mg/mL. Generally,
PDG1 and PDG3 exhibited better antioxidant activity than PDGs.

Key words: Polygonatum odoratum, Sephadex G-100, concanavalin A, glycoprotein, antioxidant activity

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