一个不同的类型的结合性大质粒体包括潜在的载体的prophage传播
bioRxiv : the preprint server for biology
|February 27, 2026
概括
结合性大质粒体称为霍多斯在各种肠道细菌中传播prophages. 这种机制解释了相关的prophages如何在遥远的细菌物种之间广泛分布,将感染与 lysogeny 分离.
科学领域:
- 微生物学 微生物学
- 遗传学 遗传学 是一个
- 基因组学就是基因组学.
背景情况:
- 密切相关的prophages在各种人类肠道细菌中发现,但传播机制尚不清楚.
- 对于广泛的细菌宿主范围内的生产性菌体感染的证据有限.
研究的目的:
- 确定人类肠道微生物群中菌体广泛分布的机制.
- 研究移动遗传元素在菌传播中的作用.
主要方法:
- 在人类肠道微生物组中描述了两种新型结合性大质粒群 (Hodors).
- 对Hodor遗传内容的分析,包括prophage基因组和与表面相关的基因.
- 检测Hodor相关的prophages作为细胞外粒子,并评估它们的转录活性.
主要成果:
- 确定了两个截然不同的,深度分歧的结合性大质粒群,称为Hodors.
- Hodors 拥有完整的 prophage 基因组,并且在遥远的 Bacillota 血统 (Bacilli 和 Clostridia) 中发现.
- 与霍多相关的prophages可以是细胞外的,并且具有转录活性.
结论:
- 结合性大质粒体 (Hodors) 作为传染物传播的移动平台.
- 这种机制解释了在基因学上遥远的肠道细菌中广泛发生相关的prophages.
- 通过Hodors的菌传播将溶解性宿主范围与感染性宿主范围分离.
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