Asgard archaea capable of anaerobic hydrocarbon cycling
Asgard archaea capable of anaerobic hydrocarbon cycling
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DOI：
10.1038/s41467-019-09364-x
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发表时间：
2019-04
影响因子：
16.6
通讯作者：
K. Seitz;Nina Dombrowski;Laura Eme;A. Spang;Jonathan Lombard;J. Sieber;A. Teske;Thijs J. G. Ettema;B. Baker
中科院分区：
文献类型：
--
作者：
K. Seitz;Nina Dombrowski;Laura Eme;A. Spang;Jonathan Lombard;J. Sieber;A. Teske;Thijs J. G. Ettema;B. Baker
海洋地下的大型天然气储层维持着复杂的厌氧微生物群落，包括有可能介导甲烷和丁烷等碳氢化合物氧化的古细菌谱系。在这里，我们描述了一种以前未知的古菌门，Helarchaeota，属于Asgard超门，具有碳氢化合物氧化的潜力。我们从富含碳氢化合物的瓜伊马斯盆地的深海热液沉积物中获得的宏基因组数据重建了Helarchaeota基因组。基因组编码甲基-CoM还原酶样酶，类似于丁烷氧化古菌中发现的酶，以及可能参与烷基-CoA氧化和Wood-Ljungdahl途径的几种酶。我们认为，Helarchaeota的成员有可能激活，随后厌氧氧化水热生成的短链烃。
Large reservoirs of natural gas in the oceanic subsurface sustain complex communities of anaerobic microbes, including archaeal lineages with potential to mediate oxidation of hydrocarbons such as methane and butane. Here we describe a previously unknown archaeal phylum, Helarchaeota, belonging to the Asgard superphylum and with the potential for hydrocarbon oxidation. We reconstruct Helarchaeota genomes from metagenomic data derived from hydrothermal deep-sea sediments in the hydrocarbon-rich Guaymas Basin. The genomes encode methyl-CoM reductase-like enzymes that are similar to those found in butane-oxidizing archaea, as well as several enzymes potentially involved in alkyl-CoA oxidation and the Wood-Ljungdahl pathway. We suggest that members of the Helarchaeota have the potential to activate and subsequently anaerobically oxidize hydrothermally generated short-chain hydrocarbons.