对细菌基因组的大规模分析揭示了成千上万的菌体
Alexander Perfilyev1, Anastasiya Gæde1, Steve Hooton2
1Center for Evolutionary Hologenomics, Globe Institute, University of Copenhagen, Copenhagen, Denmark.
Nature microbiology
|December 30, 2025
概括
研究人员在细菌基因组序列中发现了超过10万个菌体基因组,挑战了现有的菌体生物学概念. 这一发现显著扩大了与细菌宿主相关的已知菌体的多样性.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 病毒学 病毒学
背景情况:
- 菌体是感染细菌的病毒,通常被分为温和 (集成到宿主DNA中) 或溶性 (复制和溶解宿主细胞).
- 由于它们的复制周期,通常不期望在细菌基因组序列中发现菌体.
- 细菌基因组测序项目主要关注细菌DNA,经常忽视或排除病毒序列.
研究的目的:
- 为了研究大规模细菌基因组组合中的菌体基因组的存在和范围.
- 通过这种分析来表征新的菌体群并扩大已知的菌体属.
- 重新评估关于菌体生活方式及其在细菌基因组数据中的存在的基本假设.
主要方法:
- 分析了来自1226个物种的360万个细菌基因组组合.
- 在这些组合中识别和表征完整的菌体基因组,称为细菌组合相关菌体序列 (BAPS).
- 比较基因组学以识别新的菌体群并扩展现有的菌体属.
主要成果:
- 在细菌组合中发现了119,510个性菌体基因组,这显著增加了已知的菌体与宿主之间的关联.
- 识别以前未被描述的菌体群,包括与大肠杆菌和西格拉菌中的沙门氏菌菌体相关的菌体群.
- 已知属的大量扩张,如Seoulvirus,从16个成员增加到300多个成员.
- 检测用于治疗的临床菌体的近亲,表明临床隔离物档案潜在的菌体候选人.
结论:
- 在细菌组合中存在完整的菌体基因组挑战了对菌生活方式的传统理解.
- 细菌基因组测序存档了一个巨大的,以前未被识别的Lytic菌体库.
- 这一发现需要对菌体生物学进行重新评估,并为菌体发现和应用提供了新的途径.
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