食品科学 ›› 2017, Vol. 38 ›› Issue (16): 29-35.doi: 10.7506/spkx1002-6630-201716005

• 生物工程 • 上一篇    下一篇

泡盛曲霉液体发酵产β-1,3-1,4-葡聚糖酶的条件优化

刘二伟,杨绍青,闫巧娟,江正强   

  1. (1.河南科技大学食品与生物工程学院,河南?洛阳 471000;2.中国农业大学食品科学与营养工程学院,北京 100083;3.中国农业大学工学院,北京 100083)
  • 出版日期:2017-08-25 发布日期:2017-08-18
  • 基金资助:
    国家自然科学基金面上项目(31471688)

Optimization of Liquid-State Fermentation Conditions for β-1,3-1,4-Glucanase (Lichenase) Production by Aspergillus awamori

LIU Erwei, YANG Shaoqing, YAN Qiaojuan, JIANG Zhengqiang   

  1. (1. College of Food Science and Bioengineering, Henan University of Science and Technology, Luoyang 471000, China; 2. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; 3. College of Engineering, China Agricultural University, Beijing 100083, China)
  • Online:2017-08-25 Published:2017-08-18

摘要: 从土壤样品中筛选得到一株高产β-1,3-1,4-葡聚糖酶的真菌,经鉴定为泡盛曲霉(Aspergillus awamori), 命名为Aspergillus awamori CAU33。依次采用单因素试验和响应面分析法优化了其液体发酵产β-1,3-1,4-葡聚糖酶的 条件,得到该菌株产酶的最适条件为:玉米芯质量浓度55 g/L、大豆蛋白胨质量浓度25 g/L、曲拉通X-114质量浓度 23 g/L、初始pH 4.5、培养温度35 ℃、培养时间6 d。在此条件下β-1,3-1,4-葡聚糖酶活力达到8 447 U/mL,为优化前 的17.6 倍。

关键词: β-1,3-1,4-葡聚糖酶, 液体发酵, 优化, 泡盛曲霉

Abstract: The liquid-state fermentation conditions for β-1,3-1,4-glucanase production by Aspergillus awamori CAU33, a fungal strain isolated from soil sample, were optimized using a combination of one-factor-at-a-time method and response surface methodology. The highest β-1,3-1,4-glucanase activity of 8 447 U/mL was achieved after 6 days of culture at 35 ℃ in a medium consisting of corncob 55 g/L, soybean peptone 25 g/L, and Triton X-114 23 g/L at an initial pH of 4.5, about 17.6 times higher than before the optimization.

Key words: β-1,3-1,4-glucanase, liquid-state fermentation, optimization, Aspergillus awamori

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