华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (12): 55-58.

• 生物工程 • 上一篇    下一篇

酶解法制备乌鸡蛋白肽的动力学研究

彭志英1 陈中1† 龙彪1 邱礼平2  陈勇根2   

  1. 1. 华南理工大学 食物蛋白工程研究中心, 广东 广州 510640; 2. 深圳市生物谷科技投资有限公司, 广东 深圳 518026
  • 收稿日期:2005-09-16 出版日期:2006-12-25 发布日期:2006-12-25
  • 通信作者: 陈中(1968-), 副教授. E-mail: chzhong@scut.edu. cn
  • 作者简介:彭志英(1934-), 男, 教授, 博士生导师, 主要从事食品生物技术方面的研究.
  • 基金资助:

    广东省科技攻关项目( 2006A20403001)

Investigation into Kinetics of Enzymatic Preparation of Peptides from Gallus Protein

Pe Zhi-ying1  Chen Zhong1  Long Biao1  Qiu Li-ping2  Chen Yong-gen2   

  1. 1.Research Center of Food Protein Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.Shenzhen Bio-Valley Sci-Tech Investment Co.,Ltd.,Shenzhen 518026,Guangdong,China
  • Received:2005-09-16 Online:2006-12-25 Published:2006-12-25
  • Contact: 陈中(1968-), 副教授. E-mail: chzhong@scut.edu. cn
  • About author:彭志英(1934-), 男, 教授, 博士生导师, 主要从事食品生物技术方面的研究.
  • Supported by:

    广东省科技攻关项目( 2006A20403001)

摘要: 以乌鸡蛋白为底物, 研究了木瓜蛋白酶在酶解乌鸡蛋白制备乌鸡蛋白肽时的一级热失活、拟态条件下的米氏常数, 建立了考虑底物反竞争性抑制和产物竞争性抑制等影响因素下的反应动力学模型, 并根据实验结果求得在70℃下的酶催化水解反应动力学常数K d 为0. 0113m in- 1, Km 为5. 70×10- 3 mo l /L, K cat为1. 5898min- 1, 并得到了相应的水解度动力学模型和反应速度动力学模型.

关键词: 木瓜蛋白酶, 水解, 乌鸡, 蛋白肽, 动力学模型

Abstract:

The one-order thermal inactivation of papain for the enzymatic preparation of peptides from Ga/lus protein was investigated with the Gallus protein as the substrate.Th e K value under the mimesis of enzymatic preparation was also investigated.Then,by taking into account the competitive inhibition from both the substrate and the pro-duct.the corresponding enzymatic kinetic models were established.Moreover,the kinetic constants of the enzyma-tic preparation at 70℃ were respectively determ ined asK d=0. 0113m in- 1,  Km=5. 70×10- 3mol/L and  K cat=1. 5898min- 1.The kinetic models describing the hydroxylation degree and the hydrolysis velocity were finally de-term ined.

Key words: words, papain, hydrolysis, Gallus, peptide, kinetic model