生物技术通报 ›› 2025, Vol. 41 ›› Issue (11): 153-165.doi: 10.13560/j.cnki.biotech.bull.1985.2025-0738

• 未来食品工程专题 • 上一篇    

一株高产维生素B13不动杆菌鉴定及发酵条件优化

张严化1(), 曲文龙1, 戴文静1, 张睿宁1, 刘羽鸿2, 王德培1, 薛鲜丽1()   

  1. 1.天津科技大学生物工程学院,天津 300457
    2.佛山大学动物科技学院,佛山 528225
  • 收稿日期:2025-07-10 出版日期:2025-11-26 发布日期:2025-12-09
  • 通讯作者: 薛鲜丽,博士,副教授,研究方向 :微生物基因工程;E-mail: xuexianli@tust.edu.cn
  • 作者简介:张严化,硕士研究生,研究方向 :微生物基因工程;E-mail: 15265221256@163.com
  • 基金资助:
    国家重点研发计划项目(2021YFC1808901)

Identification of a High-yielding Vitamin B 13Acinetobacter Strain and Optimization of Its Fermentation Conditions

ZHANG Yan-hua1(), QU Wen-long1, DAI Wen-jing1, ZHANG Rui-ning1, LIU Yu-hong2, WANG De-pei1, XUE Xian-li1()   

  1. 1.College of Biological Engineering, Tianjin University of Science and Technology, Tianjin 300457
    2.College of Animal Science and Technology, Foshan University, Foshan 528225
  • Received:2025-07-10 Published:2025-11-26 Online:2025-12-09

摘要:

目的 从天津市滨海新区近岸海域微生物资源中分离筛选一株具有天然合成维生素B13能力的不动杆菌Acinetobacter sp. WJ01,并探究菌株最佳发酵条件。 方法 对WJ01菌株进行筛选鉴定和生理生化特性分析,并通过HPLC、紫外扫描光谱、红外光谱和拉曼光谱分析其产酸物质,以单因素试验和正交试验进行种子培养基及发酵培养基优化,最后在5 L发酵罐中进行放大实验。 结果 不动杆菌WJ01是一株革兰氏阴性菌,对环丙沙星(CIP)、左氧氟沙星(LEV)、米诺环素(MI)、多西环素(DO)抗生素高度敏感;多种光谱分析结合分子式C₅H₄N₂O₄,确定WJ01菌株是一株能够生产维生素B13的不动杆菌;最佳种子培养参数:pH 7.0、温度37 ℃、转速180 r/min、种子生长时间24 h;最佳发酵培养参数:CaCO3 6%、接种量2%、温度35 ℃、转速200 r/min。经5 L发酵罐培养生产维生素B13,发酵80 h时维生素B13的产量可高达112.46 g/L,发酵强度1.49 g/L/h,糖酸转化率为0.76 g/g。 结论 不动杆菌Acinetobacter sp. WJ01为微生物发酵法产维生素B13提供了优良菌种。

关键词: 维生素B13, HPLC, 培养基优化, 培养条件优化, 发酵罐培养

Abstract:

Objective To isolate and screen a strain of Acinetobacter sp. WJ01 capable of naturally synthesizing vitamin B13 from the microbial resources of the coastal waters in Tianjin Binhai New Area, and to establish its optimal fermentation conditions. Method Strain WJ01 was subjected to screening, identification, and analysis of physiological and biochemical characteristics. The acid-producing substances were analyzed by high-performance liquid chromatography (HPLC), ultraviolet (UV) scanning spectroscopy, infrared (IR) spectroscopy, and Raman spectroscopy. Single-factor experiments and orthogonal tests were performed to optimize the seed culture medium and fermentation medium. Finally, a scale-up experiment was conducted in a 5-L fermenter. Result Acinetobacter sp. WJ01 was identified as a Gram-negative bacterium highly sensitive to the antibiotics ciprofloxacin (CIP), levofloxacin (LEV), minocycline (MI), and doxycycline (DO). Multiple spectroscopic analyses combined with the molecular formula C5H4N2O4 confirmed that strain WJ01 is an Acinetobacter strain capable of producing VB13. The optimal seed culture parameters were: pH 7.0, temperature 37 ℃, shaking speed 180 r/min, and seed growth time 24 h. The optimal fermentation parameters were: CaCO₃ 6%, inoculum size 2%, temperature 35 ℃, and shaking speed 200 r/min. Using a 5-L fermenter, the VB13 yield reached 112.46 g/L at 80 h, with a fermentation intensity of 1.49 g/L/h and a sugar-acid conversion rate of 0.76 g/g. Conclusion Acinetobacter sp. WJ01 provides an excellent microbial strain for the production of VB13 via fermentation.

Key words: Vitamin B13, HPLC, culture medium optimization, culture condition optimization, fermenter cultivation