来自深海甲泄漏的thaumarchaeota为它们的进化历史和生态影响提供了新的见解
Yingdong Li1,2,3,4, Jiawei Chen2,3,4, Yanxun Lin3
1CAS Key Laboratory for Experimental Study Under Deep-Sea Extreme Conditions, Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China.
Microbiome
|October 10, 2024
概括
氨氧化古生物 (AOA) 是深海透甲生态系统的关键. 这项研究揭示了它们的古代起源,进化扩张,以及它们在全球循环中的重要作用.
科学领域:
- 微生物学 微生物学
- 地质化学 地质化学
- 进化生物学 进化生物学
背景情况:
- 氨氧化古生物 (AOA) 对于海洋环境中的化和氨去除至关重要.
- 深海透甲 (DMS) 沉积物中的AOA研究不足.
- 研究DMS中的AOA对于理解营养循环和生态系统功能至关重要.
研究的目的:
- 研究AOA在全球DMS中的代谢活动,进化史和生态作用.
- 分析来自南中国海的DMS中氨氧化基因 (amoA) 的表达.
- 为了确定AOA对DMS氨使用的贡献.
主要方法:
- 全球DMS转基因组学和转基因组组装基因组 (MAGs) 分析.
- 对MAGs的基因组学分析,以重建进化历史.
- 分子约会以估计分离时间.
- 进行比较基因组分析以推断代谢能力.
- 在南中国海DMS中氨氧化基因 (amoA) 表达的分析.
主要成果:
- 在DMS表面层中,AOA占氨利用基因的75%以上.
- 特定于AOA的amoA基因在来自南中国海的DMS中被积极表达.
- DMS-AOA从深海的祖先进化,扩展到浅水,形成了amoA-NP-gamma类.
- DMS-AOA起源于大约8亿年前,与Neoproterozoic氧化事件一致.
- DMS-AOA显示了异质变异,透调节,运动性和化学反应的增强能力.
结论:
- 在全球DMS生态系统中,AOA在循环中发挥着至关重要的作用.
- 这项研究为Thaumarchaeota AOA.的进化轨迹提供了新的见解.
- 这些发现强调了AOA在深海环境中的生态意义.
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