山东科学 ›› 2018, Vol. 31 ›› Issue (5): 43-47.doi: 10.3976/j.issn.1002-4026.2018.05.008

• 生物传感器 • 上一篇    下一篇

不同比生长速率对毕赤酵母发酵生产植酸酶的影响

赵凯, 葛菁华, 王海   

  1. 青岛蔚蓝生物集团有限公司,山东 青岛 266101
  • 收稿日期:2018-05-30 出版日期:2018-10-20 发布日期:2018-10-20
  • 作者简介:赵凯(1987-),男,硕士研究生,研究方向为微生物发酵。E-mail:zhaok@vlandgroup.com
  • 基金资助:

    山东省重点研发计划(2016ZDJS07A20)

Effects of different specific growth rates on phytase production by Pichia pastoris fermentation

ZHAO Kai, GE Jing-hua, WANG Hai   

  1. Qingdao Vland Biotech Inc, Qingdao 266101, China
  • Received:2018-05-30 Online:2018-10-20 Published:2018-10-20

摘要:

不同比生长速率控制条件下毕赤酵母代谢流流向不同,从而导致产酶量的不同。为了得到毕赤酵母发酵生产植酸酶的最适比生长速率,对毕赤酵母工程菌50 L发酵生产植酸酶的工艺条件进行了研究。结果表明,通过调节甲醇的流加速度,控制菌体比生长速率为0.02 h-1,发酵结束时,植酸酶酶活17 445 U/mL,比对照提高69.7 %,该比生长速率对发酵生产植酸酶最有利。

关键词: 毕赤酵母, 植酸酶, 发酵优化, 比生长速率

Abstract:

Different specific growth rates lead to different metabolic fluxes in Pichia pastoris, further resulting in different levels of enzyme production. In order to obtain optimum specific growth rate for the production of phytase by Pichia pastoris, the optimal fermentation conditions of recombinant Pichia pastoris producing phytase in 50 L fermentation tank were studied in this paper. The results showed that specific growth rate was adjusted to 0.02 h-1 by controlling the flow of methanol, by the end of fermentation, the phytase activity got to be 17 445 U/mL, with 69.7 % higher than the control. It suggests that the specific growth rate is the most favorable for the production of phytase by fermentation.

Key words: specific growth rate, Pichia pastoris, fermentation optimization, phytase

中图分类号: 

  • Q936

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