食品科学 ›› 2018, Vol. 39 ›› Issue (9): 7-12.doi: 10.7506/spkx1002-6630-201809002

• 基础研究 • 上一篇    下一篇

酸性电解水对南美白对虾中多酚氧化酶活性的影响

孙江萍1,赵 莉1,俞文英1,谢 晶1,2,3,潘迎捷1,2,3,赵 勇1,2,3,*   

  1. 1.上海海洋大学食品学院,上海 201306;2.上海水产品加工及贮藏工程技术研究中心,上海 201306;3.农业部水产品贮藏保鲜质量安全风险评估实验室,上海 201306
  • 出版日期:2018-05-15 发布日期:2018-05-15
  • 基金资助:
    国家自然科学基金面上项目(31571917; 31671779);上海市科委计划项目(14320502100);上海市科技兴农重点攻关项目(沪农科攻字2014第3-5号;2015第4-8号;2016第1-1号);上海市教委曙光计划项目(15SG48)

Effect of Acidic Electrolyzed Water on Polyphenoloxidase Activity from Litopenaeus vannamei

SUN Jiangping1, ZHAO Li1, YU Wenying1, XIE Jing1,2,3, PAN Yingjie1,2,3, ZHAO Yong1,2,3,*   

  1. 1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; 2. Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, Shanghai 201306, China; 3. Laboratory of Quality and Safety Risk Assessment for Aquatic Product on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
  • Online:2018-05-15 Published:2018-05-15

摘要: 酸性电解水(acidic electrolyzed water,AEW)作为一种新型的杀菌保鲜技术已经被应用于海产品的保 鲜方面,实践表明AEW对南美白对虾的黑变有抑制效果。为了探究其作用机理,将南美白对虾中多酚氧化酶 (polyphenoloxidase,PPO)进行提取纯化,并研究AEW对PPO的抑制效果及抑制类型。十二烷基硫酸钠-聚丙烯酰 胺凝胶电泳结果显示,PPO的提纯效果较为理想;动力学研究发现,AEW对PPO活力具有显著抑制效果,且其作用 大小与AEW添加量呈明显的剂量-效应关系。AEW对PPO抑制类型为混合型抑制,抑制常数Ki为0.64 mmol/L。实验 结果为进一步探明AEW抑制南美白对虾黑变的作用机理提供了理论基础。

关键词: 酸性电解水, 南美白对虾, 多酚氧化酶, 混合型抑制, 黑变

Abstract: Recently, acidic electrolyzed water (AEW) has been applied in seafood preservation as a novel technology. It is reported that AEW has strong ability to delay the development of melanosis in Litopenaeus vannamei and extend its shelflife. In this paper, polyphenoloxidase (PPO), an essential enzyme for melanosis in Litopenaeus vannamei, was extracted and purified. The effects and kinetics of AEW on purified PPO were then investigated. Based on sodium dodecyl sulfatepolyacrylamide gel electrophoresis, PPO from Litopenaeus vannamei was well purified. Kinetic studies revealed that AEW exhibited inhibitory effects on PPO with a dose-effect relationship. Moreover, AEW showed mixed-type inhibition on PPO with inhibitory constant Ki value of 0.64 mmol/L. In conclusion, this study can provide a theoretical basis for further exploring the mechanism of AEW in food preservation.

Key words: acidic electrolyzed water, Litopenaeus vannamei, polyphenoloxidase, mixed-type inhibition, melanosis

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