通过酸盐耐受性查和基于高收益机制的转录组分析,增强了Streptomyces gilvosporeus中的纳塔amycin生产
Liang Wang1, Wen Xiao1, Ting Qiu1
1Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China.
Microbial cell factories
|April 2, 2025
概括
这项研究使用原生质聚变和酸盐选增强了Streptomyces gilvosporeus中的纳塔胺素产量. 工程菌株GR2-P3取得了创纪录的产量,证明了代谢工程在抗真菌抗生素生产中的重要性.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 代谢工程是代谢工程.
背景情况:
- 纳塔米辛是一种广泛的抗真菌抗生素,对食品保存和医学至关重要.
- 在生产菌株方面,纳他的生物合成能力有限,这阻碍了工业应用.
- 进化工程是必要的,以改善纳塔胺素生产菌株.
研究的目的:
- 为了增强Streptomyces gilvosporeus.us中纳胺的产生.
- 为了确定关键的代谢途径和参与纳塔胺素生物合成的调节者.
- 开发用于工业规模纳塔胺素生产的新策略.
主要方法:
- 结合原生质融合和酸盐耐受性选,用于产生高产品种.
- 转录基因分析确定了高调节的纳塔胺素生物合成基因和代谢途径.
- 使用了代谢工程策略,包括调节器共表达,以进一步改善生产.
主要成果:
- 一种高产品种GR-2是通过增加两倍的纳塔米辛产量获得的.
- 分支链氨基酸,和代谢被证实是纳塔米辛生产的关键.
- 改造后的GR2-P3菌株获得了S. gilvosporeus. 的最高报告的纳塔胺产量 (12.2 g·L−1).
结论:
- 在GR-2中增强的纳胺素生产归因于高调节的生物合成基因和前体供应.
- 酸盐代谢调节剂PhoP和PhoR在积极调节纳塔胺生物合成中发挥着关键作用.
- 这项工作提供了一种改善菌株的新策略,并确定了纳塔米辛代谢工程的目标.
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