对于Sinorhizobium meliloti对Myxococcus xanthus的掠食性攻击进行的转录组反应
María José Soto1, Juana Pérez2, José Muñoz-Dorado2
1Departamento de Biotecnología y Protección Ambiental, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain.
Frontiers in microbiology
|July 5, 2023
概括
Myxococcus xanthus捕食引发了Sinorhizobium meliloti的显著转录变化,改变了它的细胞外和防御机制. 这种细菌相互作用会影响微生物群落和豆类共生.
科学领域:
- 微生物生态学 微生物生态学
- 细菌之间的相互作用
- 交生研究 交生研究
背景情况:
- 细菌掠食深深地影响微生物社区的结构和功能.
- Myxococcus xanthus捕食各种细菌,包括 Sinorhizobium meliloti,这是豆类的关键固共生体.
- 捕食者与猎物的相互作用需要在两种生物体中都有不同的转录适应.
研究的目的:
- 为了阐明Sinorhizobium meliloti对Myxococcus xanthus的掠食的转录反应.
- 描述S. meliloti在掠食者攻击下的"防御性"转录程序.
- 了解这些转录变化如何影响S. meliloti与豆类的相互作用.
主要方法:
- 在与M. xanthus.相互作用期间对S. meliloti进行转录组分析.
- 鉴定和描述差异表达的基因和途径.
- 重建代谢途径以推断功能适应.
主要成果:
- Myxococcus xanthus的捕食诱导了S. meliloti.中的大量转录性改变.
- 蛋白质合成,能量生成,脂肪酸合成和细胞外修饰 (表面多糖,膜脂质) 的升级.
- 降低脂肪酸降解和碳水化合物代谢的调节;诱导排泄,铁的吸收,H2O2和甲的生产.
结论:
- S. meliloti 建立了一个复杂的转录防御系统 ("defensome") 对抗 M. xanthus 的掠夺.
- 适应包括细胞外的强化和增强的应激反应机制.
- 这些细菌相互作用和由此产生的转录变化可能会影响建立有益的豆类共生.
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