新型IIb类微蛋白对格拉姆阴性ESKAPE和植物病原体表现出活性
Benedikt M Mortzfeld1,2, Shakti K Bhattarai1,2, Vanni Bucci1,2,3
1Program in Microbiome Dynamics, University of Massachusetts Chan Medical School, Worcester, United States.
eLife
|December 11, 2024
概括
这项研究在多种细菌中发现了12种新的IIb类微蛋白,扩大了已知的抗微生物多样性. 这些新型微蛋白显示出对抗耐药病原体的潜力.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 基因组学就是基因组学.
背景情况:
- 细菌素的生产是微生物竞争和生态系统动态的关键.
- IIb类微蛋白,一种由核糖体产生的 siderophore bacteriocin,对于控制病原性 Enterobacteriaceae 很重要.
- 目前,已知只有五种IIb类微,它们都来自特定的大肠杆菌和K. pneumoniae菌株.
研究的目的:
- 调查IIb类微型蛋白的流行率和多样性,超出已知的菌株和物种.
- 发现新型IIb类微蛋白并评估它们的抗菌活性.
- 探索IIb类微蛋白在对抗耐药细菌方面的潜力.
主要方法:
- 细菌基因组的生物信息查使用BLAST和手动理.
- 在七个Enterobacteriaceae物种的12个新型IIb类微蛋白的in silico识别.
- 在大肠杆菌中识别的微蛋白的异质表达,用于抗菌检测.
主要成果:
- 发现了12种新的IIb类微基因,包括3种新型基因 (MccW,MccX,MccZ) 和8种新型变异.
- 已证明对植物病原体 (Brenneria,Gibbsiella,Rahnella) 和ESKAPE病原体 (Acinetobacter baumannii,Pseudomonas aeruginosa) 的抗微生物活性.
- 第一次证据表明IIb类微型蛋白向了Enterobacteriaceae家族以外的细菌.
结论:
- 类IIb微基因比以前认为的更广泛.
- 新型和人工微蛋白显示出对抗耐药病原体的治疗剂的前景.
- 这些发现支持开发工程活生物疗法产品,以对抗抗性细菌.
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