大肠杆菌产L-酪氨酸发酵工艺优化

杜丽红1*,袁谨怡1,战俊杰2,陈雨新1,王可答1,李 杨1,朱 璇1,张金凤1

(1.绥化学院生物活性物质研究与应用开发科研团队,绥化152000;2.象屿金谷生化科技有限公司,绥化152000)

摘要:L-酪氨酸是一种重要的必需氨基酸,属于芳香族氨基酸,在医药、食品、化工中被广泛应用。该研究以基因工程菌大肠杆菌(Escherichia coli)TY03菌株为L-酪氨酸生产菌,通过单因素和响应面实验研究发酵过程中接种量、发酵温度、溶氧量、发酵pH值和发酵时间对L-酪氨酸产量的影响,确定适宜的发酵工艺。最终确定发酵过程中pH控制为6.8,溶氧31.2%,发酵温度35.8℃,在此条件下发酵24h,L-酪氨酸产量最高达到42.0g/L。该研究确定了菌株TY03产L-酪氨酸适宜的发酵工艺,同时为微生物发酵法生产L-酪氨酸提供了一定的理论基础。

关键词:L-酪氨酸;大肠杆菌;发酵工艺

中图分类号:TQ922.9 文献标识码:A 文章编号:1674-506X(2024)05-0016-0007


Optimization of L-Tyrosine Fermentation Process by Escherichia coli

DU Lihong1*,YUAN Jinyi1,ZHAN Junjie2,CHEN Yuxin1,WANG Keda1,LI Yang1,ZHU Xuan1,ZHANG Jinfeng1

(1.Research and Application Development Team for Bioactive Substances,SUI HUA University,Suihua 152000,China;2.Xiangyu Jingu Biochemical Technology Co.,Ltd.,Suihua 152000,China)

Abstract:L-tyrosine is an important essential amino acid, belonging to the aromatic amino acid, which is widely used in medicine,food and chemical industry. In this study,using the genetically engineered Escherichia coli TY03 strain as L-tyrosine producing bacteria. The effects of inoculation amount,fermentation temperature, dissolved oxygen,fermentation pH value and fermentation time on L-tyrosine production were studied by single factor and response surface experiments,and the suitable fermentation technology was determined. In the end, the pH was controlled at 6.8, dissolved oxygen was 31.2%, the fermentation temperature was 35.8 ℃, under such condition for 24 h, the L- tyrosine content reached 42.0 g/L. The study determined the appropriate fermentation process of strain TY03 producing L-tyrosine,and provided some theoretical basis for the production of L-tyrosine by microbial fermentation.

Keywords:L-tyrosine;Escherichia coli;fermentation process

doi:10.3969/j.issn.1674-506X.2024.05-003

收稿日期:2023-10-18

基金项目:黑龙江省教育厅基本科研业务费项目(YWK10236210232);黑龙江省青年人才托举工程项目(2022QNTJ08);黑龙江省自然科学基金项目(LH2022C106)

作者简介:杜丽红(1991-),女,博士,讲师。研究方向:微生物发酵。

*通信作者

引用格式:杜丽红,袁谨怡,战俊杰,等.大肠杆菌产L-酪氨酸发酵工艺优化[J].食品与发酵科技,2024,60(5):16-22.


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