在Paenibacillus中通过化学生物合成途径多样化三素化学空间
Nataliia V Machushynets1, Barbara R Terlouw2, Le Zhang1
1Molecular Biotechnology Group, Institute of Biology, Leiden University, Sylviusweg 72, Leiden 2333 BE, The Netherlands.
Journal of natural products
|January 20, 2026
概括
化学生物合成使Paenibacillus细菌能够产生多种类型的tridecaptin脂抗生素. 这种策略产生了像Oct-TriA5这样的新型化合物,具有针对具有挑战性的病原体的广泛活性.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 药物发现 药物发现 药物发现
背景情况:
- 帕尼巴西勒斯物种是生物活性非核糖体 (NRPs) 的丰富生产者.
- 对于细菌适应和抗生素开发来说,NRP的结构多样性至关重要.
- 特里德卡普丁是一种由Paenibacillus生产的脂类抗生素.
研究的目的:
- 为了研究在三素抗生素生产中化学生物合成的现象.
- 探索这种机制在产生新型抗生素化合物的潜力.
- 为了描述三甲素变体的生物活性.
主要方法:
- 对Paenibacillus菌株进行基因组挖掘,以确定相关的生物合成基因集群 (BGC) 和非核糖体合成酶 (NRPS).
- 基因操纵,包括基因删除 (triE),以确认特定NRPS在三甲蛋白生物合成中的作用.
- 合成三甲胺类类似物对病原性细菌的生物活性测试.
主要成果:
- 十五种Paenibacillus菌株既具有完整的三素BGC,也具有单独的三素类NRPS.
- 帕尼巴西勒斯种类 (Paenibacillus sp. JJ-1683产生了三甲A5和三甲B1,证实了协作生物合成.
- 删除 triE 取消了三素的生产,证实了它的重要作用.
- 合成的Oct-TriA5表现出针对格兰正和格兰阴性ESKAPE病原体的宽频活性.
- Oct-TriB1对格拉姆阴性细菌表现出中度活性,但对格拉姆阳性细菌没有.
结论:
- 化学生物合成是一种经过验证的策略,用于在Paenibacillus中产生多个tridecaptin变体.
- 这种机制允许生成具有独特化学结构和生物活性配置文件的脂抗生素.
- Oct-TriA5的广谱活性突出显示了嵌合生物合成的潜力,用于发现针对具有挑战性的病原体的新抗生素.
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