来自环境Pseudomonas分离物的新型微信B17原体的异构表达和功能特征
Sandrien De Smedt1,2, Dries Wéry1,2, Hanne Vande Capelle1,3
1VIB-KU Leuven Center for Microbiology, Flanders Institute for Biotechnology, 3001, Leuven, Belgium.
Applied microbiology and biotechnology
|January 29, 2026
概括
在Pseudomonas中发现了新型的微B17 (MccB17) 类. 尽管结构相似,但这些同源在大肠杆菌中引起了明显的生理效应,扩大了已知的RiPP多样性.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 微信B17 (MccB17) 是一种具有抗菌性能的核糖体合成和翻译后修饰 (RiPP).
- 由于MccB17的溶解度较低和活动频谱狭窄,因此MccB17的治疗应用受到阻碍.
研究的目的:
- 从环境Pseudomonas分离物中识别和功能性描述新型MccB17类生物合成基因集群 (BGCs).
- 在大肠杆菌表达时,研究这些新型MccB17原体的生理影响.
主要方法:
- 基因组挖掘被用来识别潜在的MccB17类BGCs.
- 鉴定到的BCCs被克隆,并在大肠杆菌中异质表达.
- 评估了表型效应,并使用RT-qPCR和LC-MS确认了的产生. 进行了转录组分析.
主要成果:
- 确定并表达了四种新的MccB17类BGC.
- 表达的同源在大肠杆菌中诱导了依赖于同源的生长阻滞和细胞延长,但缺乏抗菌活性.
- 转录组分析揭示了明显的应激反应和代谢转变,不同BGC之间存在有限的重叠.
结论:
- 结构相似的MccB17原体可以在宿主生物体中引起独特的生理反应.
- 这项研究扩大了MccB17类RiPP的范围,并强调探索RiPP多样性超越抗菌活性.
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