山东科学 ›› 2018, Vol. 31 ›› Issue (4): 85-88.doi: 10.3976/j.issn.1002-4026.2018.04.014

• 生物传感器 • 上一篇    下一篇

不同湿重诱导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:2018-08-20 发布日期:2018-08-20
  • 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)

Influence of the wet cell weight before induction on secretive expression of phytase in Pichia pastoris

ZHAO Kai, GE Jing-hua, WANG Hai   

  1. Qingdao Vland Biotech Inc, Qingdao 266101, China
  • Received:2018-05-30 Online:2018-08-20 Published:2018-08-20

摘要:

为了提高毕赤酵母工程菌(Mut+)植酸酶的表达量,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,通过流加葡萄糖提高菌体湿重到300 g/L,随后停止流加,溶氧回升后流加甲醇开始诱导,最终发酵结束时,植酸酶酶活达到21 666 U/mL,比对照提高12.9%,该诱导湿重有利于发酵生产植酸酶。

关键词: 毕赤酵母, 诱导湿重, 发酵优化, 植酸酶

Abstract:

In order to increase the expression of phytase in Pichia pastoris, the fermentation conditions of phytaseproducing recombinant Pichia pastoris in 50 L fermentation tank were optimized. The results show that the strain wet weight at 300 g/L by feeding glucose, before addition of methanol, got the phytase activity 21 666 U/mL, 12.9% higher than the control by the end of fermentation, which is most favorable for the production of phytase by fermentation.

Key words: Pichia pastoris, phytase, the wet cell weight before induction, fermentation optimization

中图分类号: 

  • Q936