全球分布的菌体基因组揭示了三方菌体-细菌-珊瑚相互作用的机制
Bailey A Wallace1, Natascha S Varona1, Poppy J Hesketh-Best1,2
1Department of Biology, University of Miami, Coral Gables, FL 33146, United States.
The ISME journal
|July 20, 2024
概括
珊瑚病毒对全生物体健康至关重要. 这项研究开发了分析珊瑚病毒的新方法,揭示了它们对细菌群落和珊瑚弹性的影响.
科学领域:
- 海洋微生物学 海洋微生物学
- 病毒学 病毒学
- 珊瑚礁生态 珊瑚礁生态
背景情况:
- 珊瑚礁的健康依赖于微生物共生体.
- 菌体 (感染细菌的病毒) 影响这些相互作用,但由于恢复挑战,在珊瑚中人们对这些相互作用的了解很少.
研究的目的:
- 克服从珊瑚样本中恢复病毒和细菌基因组的方法限制.
- 建立一个关于珊瑚相关病毒的综合数据库,并分析它们的基因组功能.
- 了解珊瑚全生物体中病毒的生态作用.
主要方法:
- 开发了一种尺寸分化方法,以增强珊瑚甲基基因组中的病毒和细菌恢复.
- 从低覆盖度测序数据组装和装箱病毒和细菌基因组.
- 整合了新发现的基因组与公开的珊瑚相关病毒和元基因组数据,以创建一个全球珊瑚病毒数据库.
- 利用菌体-CRISPR链接和宿主-菌体-基因网络来推断病毒宿主和功能.
主要成果:
- 使用大小分化显著改善细菌 (9倍) 和病毒 (2倍) 恢复.
- 建立了一个全球珊瑚病毒数据库,包含超过20,000个病毒基因组序列.
- 确定了Kyanoviridae和Autographiviridae作为最丰富的尾巴菌家族.
- 确定大多数病毒感染的是Alphaproteobacteria,Halanaerobiia和Bacteroidia.
- 发现了具有调节细菌代谢和与真核细胞相互作用的能力的基石病毒.
结论:
- 这项研究提供了关于珊瑚 holobiont. bacteriophage 角色的第一个基因组见解.
- 新的方法可以更深入地探索病毒的多样性和复杂海洋生态系统中的功能.
- 了解这些嵌套的共生关系对于珊瑚礁的弹性和保护工作至关重要.
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