食品科学 ›› 2010, Vol. 31 ›› Issue (21): 81-84.doi: 10.7506/spkx1002-6630-201021018

• 基础研究 • 上一篇    下一篇

中华鳖蛋白质组分的分步提取及其抗氧化活性

刘 彦1,刘承初1 ,* ,杨靖亚1,刘其根2,李应森2,李家乐2 , 3   

  1. 1.上海海洋大学食品学院 2.上海海洋大学 省部共建水产种质资源发掘与利用教育部重点实验室 3.上海市高校水产养殖学E- 研究院
  • 收稿日期:2010-06-29 出版日期:2010-11-15 发布日期:2010-12-29
  • 通讯作者: 刘承初 E-mail:ccliu@shou.edu.cn
  • 基金资助:

    上海海洋大学骆肇荛大学生科技创新基金项目(A-2900-08-001519);农业部公益性行业(农业)科研专项(200903028);
    上海高校创新团队建设项目;上海市教育委员会重点学科建设项目(J50704)

Sequential Extraction of Protein Fractions from Chinese Soft-shelled Turtle (Pelodiscus sinensis) and Their Antioxidant Activities

LIU Yan1,LIU Cheng-chu1,*,YANG Jing-ya1,LIU Qi-gen2,LI Ying-sen2,LI Jia-le2,3   

  1. 1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China;
    2. Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University,
    Shanghai 201306, China;3. Aquaculture Division, E-Institute of Shanghai Universities, Shanghai 201306, China
  • Received:2010-06-29 Online:2010-11-15 Published:2010-12-29
  • Contact: LIU Cheng-chu E-mail:ccliu@shou.edu.cn

摘要:

以野生中华鳖全鳖粉为原料,采用分步提取法对中华鳖的蛋白类成分进行分离,并利用等电点沉淀、醇沉、超过滤等方法分离纯化出各蛋白质组分,并对其各组分的抗氧化性进行研究,并对抗氧化活性高的组分进行分子质量测定分析;还原力的测定以还原剂BHT 为对照,清除DPPH 自由基能力的测定则进行直线回归分析并计算 IC50 值。结果表明:糖蛋白组分及水溶性蛋白组分抗氧化活性较高,IC50 值为0.21mg/mL 和1.94mg/mL。因此,中华鳖各蛋白组分有较高的抗氧化能力且呈显著的剂量效应关系,其在抗氧化方面和保健食品方面具有巨大的开发潜力。

关键词: 中华鳖, 分步提取, 纯化, 氨基酸, 抗氧化活性

Abstract:

Protein fractions were separated and purifies from wild Chinese soft-shelled turtles using sequential extraction procedures and their antioxidant activities were investigated by DPPH free radical scavenging and reducing power assays. It was found that the glycoprotein and water-soluble protein fractions had higher antioxidant effect in a positive concentrationdependent fashion, with half maximal inhibitory concentrations (IC50) of 0.21 mg/mL and 1.94 mg/mL, respectively. These results suggest that the protein fractions from Chinese soft-shelled turtle possess strong antioxidant activities and have a great potential to be developed as a healthcare food or a nutriceutical.

Key words: Chinese soft-shelled turtle (Pelodiscus sinensis), sequential extraction, purification, amino acids, antioxidant capability

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