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首页> 美国卫生研究院文献>MicrobiologyOpen >Genomic ecology of Marine Group II the most common marine planktonic Archaea across the surface ocean
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Genomic ecology of Marine Group II the most common marine planktonic Archaea across the surface ocean

机译：海洋第二组的基因组生态学是整个表层海洋中最常见的海洋浮游古细菌

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摘要

Planktonic Archaea have been detected in all the world's oceans and are found from surface waters to the deep sea. The two most common Archaea phyla are Thaumarchaeota and Euryarchaeota. Euryarchaeota are generally more common in surface waters, but very little is known about their ecology and their potential metabolisms. In this study, we explore the genomic ecology of the Marine Group II (MGII), the main marine planktonic Euryarchaeota, and test if it is composed of different ecologically relevant units. We re‐analyzed Tara Oceans metagenomes from the photic layer and the deep ocean by annotating sequences against a custom MGII database and by mapping gene co‐occurrences. Our data provide a global view of the distribution of Euryarchaeota, and more specifically of MGII subgroups, and reveal their association to a number of gene‐coding sequences. In particular, we show that MGII proteorhodopsins were detected in both the surface and the deep chlorophyll maximum layer and that different clusters of these light harvesting proteins were present. Our approach helped describing the set of genes found together with specific MGII subgroups. We could thus define genomic environments that could theoretically describe ecologically meaningful units and the ecological niche that they occupy.
机译：浮游生物古细菌已在世界所有海洋中发现，并发现于地表水和深海。最常见的两种古细菌门是Thaumarchaeota和Euryarchaeota。 Euryarchaeota通常在地表水中更为常见，但对其生态学和潜在的新陈代谢知之甚少。在这项研究中，我们探索了海洋第二类（MGII）（主要的海洋浮游Euryarchaeota）的基因组生态学，并测试了它是否由不同的生态相关单位组成。我们通过自定义MGII数据库注释序列并绘制基因共现图谱，重新分析了来自光层和深海的塔拉海洋元基因组。我们的数据提供了Euryarchaeota分布的全局视图，更具体地说是MGII亚组的分布，并揭示了它们与许多基因编码序列的关联。特别地，我们表明在表面和深叶绿素最大层中均检测到MGII蛋白视紫红质，并且存在这些光收集蛋白的不同簇。我们的方法有助于描述与特定MGII亚组一起发现的基因集。因此，我们可以定义可从理论上描述具有生态意义的单位及其所占据的生态位的基因组环境。

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