优化表达的oxazolomycins在工程Streptomyces longshengensis和他们的活动评估的表达
Huiying Sun1,2, Xiang Liu1,2, Junyue Li1,2
1State Key Laboratory of Microbial Diversity and Innovative Utilization, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
Microbial cell factories
|May 20, 2025
概括
长菌 (Streptomyces longshengensis) 的代谢工程显著增强了氧化胺的产生,产生了具有强大的抗微生物和抗氧化活性的Toxa5,用于潜在的临床应用.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 药物创新对于对抗严重疾病和病原体至关重要.
- 来自Streptomyces的抗生素Oxazolomycins具有多样化的结构和活动,但面临着发展障碍.
- 提高奥克萨佐洛米产量对于评估生物活性和优化药物特性至关重要.
研究的目的:
- 通过代谢工程来增强Streptomyces longshengensis中的佐洛米辛产量.
- 评估增强型佐洛米辛对临床相关病原体的生物活性.
主要方法:
- 协同转录分析以识别oxazolomycin生物合成基因集群 (oxa BGC).
- 基因工程是用S. longshengensis.中的构成性促进体 (Pneo和PkasO*) 取代本地促进体.
- 使用亚致死剂 gentamicin 剂量来优化遗传背景的变异发生.
- 引入载体基因 (ozmS和oxaA) 以进一步提高产量.
主要成果:
- 工程菌株SL_OE显示ToxA5产量增加了4倍.
- 突变SL_ROE在突变发生和输送基因引入后,在摇瓶发酵中达到175mg/L的ToxA5.
- 纯化Toxa5显示出明显抑制Pseudomonas aeruginosa和Bacillus subtilis生物膜的作用.
- 托克萨5表现出前所未有的抗氧化活性.
结论:
- 在S. longshengensis中使用基因工程建立了高产氧化胺系统.
- 由于其抗微生物和抗氧化剂特性,Oxazolomycin Toxa5显示出临床应用的潜力.
- 开发了一种有效的策略,用于过度生产和评估生物活性.
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