食品科学 ›› 2012, Vol. 33 ›› Issue (13): 152-155.doi: 10.7506/spkx1002-6630-201213032

• 生物工程 • 上一篇    下一篇

产蛋白酶菌株的鉴定及酶学特性

宋鹏,陈亮,郭秀璞   

  1. 1.河南科技大学农学院 2.河南工业大学生物工程学院
  • 出版日期:2012-07-15 发布日期:2012-07-27
  • 基金资助:
    国家自然科学基金项目(41003030);河南科技大学青年科学基金项目(2012QN007); 河南科技大学博士科研启动基金项目(09001379)

Identification of Protease-Producing Strain and Preliminary Studies on Enzymatic Properties

SONGPeng,CHENLiang,GUOXiu-pu   

  1. (1. College of Agriculture, Henan University of Science and Technology, Luoyang 471003, China; 2. School of Bioengineering, Henan University of Technology, Zhengzhou 450001, China)
  • Online:2012-07-15 Published:2012-07-27

摘要: 通过形态学观察、生理生化实验以及16S rDNA基因序列分析对分离自味精糖化废渣中的产蛋白酶菌株NX-PB17进行鉴定,并对其蛋白酶特性进行研究。结果表明:菌株NX-PB17为枯草芽孢杆菌(Bacillus subtilis),其蛋白酶最适酶解温度为50℃,最适pH值为7.0,并且具有良好的热稳定性和pH值稳定性。

关键词: 味精废渣, 产蛋白酶菌株, 鉴定, 枯草芽孢杆菌, 酶学特性

Abstract: The aim of this study was to screen and identify protease-producing strain from saccharification waste in the production of monosodium glutamate. A protease-producing strain named as NX-PB17 was obtained and identified as Bacillus subtilis based on morphological observation, physiological and biochemical experiments and 16S rDNA sequence analysis. The optimal temperature and pH for protease activity was 50 ℃ and 7.0, respectively. In addition, the obtained protease exhibited excellent stability in a wide range of temperature and pH. Therefore, this strain has huge potential for industrial production.

Key words: waste from the production of monosodium glutamate, protease-producing strain, identification, Bacillus subtilis, protease properties

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