食品科学

• 生物工程 • 上一篇    下一篇

枯草芽孢杆菌高产中性蛋白酶发酵条件的优化

刘 颖,张彬彬,孙冰玉,刘琳琳,邹丽宏,石彦国   

  1. 哈尔滨商业大学食品工程学院,黑龙江省普通高等学校食品科学与工程重点实验室,黑龙江 哈尔滨 150076
  • 出版日期:2014-07-15 发布日期:2014-07-18

Optimization of Fermentation Conditions for Production of Neutral Protease by Bacillus subtilis 10075

LIU Ying, ZHANG Bin-bin, SUN Bing-yu, LIU Lin-lin, ZOU Li-hong, SHI Yan-guo   

  1. Key Laboratory for Food Science and Engineering of Heilongjiang Province, College of Food Engineering,Harbin University of Commerce, Harbin 150076, China
  • Online:2014-07-15 Published:2014-07-18

摘要:

通过单因素试验和正交试验对枯草芽孢杆菌10075菌株发酵产中性蛋白酶的培养基组分及培养条件进行优化,达到提高菌株中性蛋白酶产量的目的。结果表明,发酵培养基的最佳组分:添加麦芽糖8.0%、蛋白胨4.0%、MgSO4 0.08%;最适发酵条件为发酵温度37 ℃、初始pH 7.0、发酵时间42 h,酶活力由最初的98.36 U/mL 提高到353.45 U/mL。

关键词: 枯草芽孢杆菌, 中性蛋白酶活力, 发酵, 优化

Abstract:

The medium components and culture conditions for Bacillus subtilis 10075 were optimized by single-factor
and orthogonal array design methods to increase the production of neutral protease. The results showed that the optimized
medium consisted of 8.0% maltose, 4.0% peptone and 0.08% MgSO4, and the optimized culture conditions were 37 ℃, 7.0
and 42 h for temperature, initial pH and time, respectively. The activity of neutral protease after optimization was increased
from 98.36 to 353.45 U/mL.

Key words: Bacillus subtilis, neutral protease activity, fermentation, optimization