Isolation and Characterization of a Hydrogen-Dependent Methylotrophic Methanogen from the Thermoproteota Phylum
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Methanosuratincola petrocarbonis LWZ-6, a thermophilic archaeon belonging to the Methanosuratincolia class within the Thermoproteota phylum, is a strict hydrogen-dependent methylotrophic methanogen, expanding the known diversity of methanogens beyond the classical Euryarchaeota.
Kivonat
The content describes the isolation and characterization of a novel methanogenic archaeon, Methanosuratincola petrocarbonis LWZ-6, which belongs to the Methanosuratincolia class within the Thermoproteota phylum. This archaeon is a strict hydrogen-dependent methylotrophic methanogen, utilizing methanol and monomethylamine as electron acceptors and hydrogen as an electron donor for its energy metabolism.
Previous metagenomic studies had suggested the potential for fermentative metabolism in Methanosuratincolia members, but strain LWZ-6 does not ferment sugars, peptides, or amino acids. Its energy production is solely linked to methanogenesis. Comparative (meta)genome analysis confirmed that hydrogen-dependent methylotrophic methanogenesis is a widespread trait among Methanosuratincolia.
The isolation and characterization of this non-euryarchaeal methanogen expands the known diversity of methanogens, which were previously confined to the Euryarchaeota. This finding has implications for understanding the role of hydrogen-dependent methylotrophic methanogenesis in global methane emissions and the carbon cycle.
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Isolation of a methyl-reducing methanogen outside the Euryarchaeota - Nature
Statisztikák
Methanosuratincola petrocarbonis LWZ-6 is a strict hydrogen-dependent methylotrophic methanogen.
It utilizes methanol and monomethylamine as electron acceptors and hydrogen as an electron donor for its energy metabolism.
Strain LWZ-6 does not ferment sugars, peptides, or amino acids.
Idézetek
"Until recently, methanogens were confined to Euryarchaeota, but metagenomic studies revealed the presence of genes encoding the methyl coenzyme M reductase complex in other archaeal clades1,2,3,4, thereby opening up the premise that methanogenesis is taxonomically more widespread."
"Comparative (meta)genome analysis confirmed that hydrogen-dependent methylotrophic methanogenesis is a widespread trait among Methanosuratincolia."
Mélyebb kérdések
What are the potential ecological and biogeochemical implications of the discovery of this non-euryarchaeal methanogen?
The discovery of a non-euryarchaeal methanogen, specifically Methanosuratincola petrocarbonis LWZ-6, has significant ecological and biogeochemical implications. Firstly, it expands our understanding of the diversity of methanogens beyond the traditional Euryarchaeota, indicating that methanogenesis is taxonomically more widespread than previously thought. This discovery suggests that the contribution of methanogens to methane emissions and the global carbon cycle may be more complex and varied than initially assumed. Additionally, the identification of a hydrogen-dependent methylotrophic methanogen like LWZ-6 highlights the importance of this metabolic pathway in global methane production. Understanding the ecological niche and metabolic capabilities of non-euryarchaeal methanogens can provide insights into their roles in different environments and their impact on carbon cycling processes.
How might the physiology and metabolic capabilities of Methanosuratincolia members differ from those of the classical Euryarchaeota methanogens?
The physiology and metabolic capabilities of Methanosuratincolia members, such as LWZ-6, differ from those of classical Euryarchaeota methanogens in several key aspects. Firstly, Methanosuratincolia members are strict hydrogen-dependent methylotrophic methanogens, utilizing methanol and monomethylamine as electron acceptors and hydrogen as an electron donor. This metabolic pathway is distinct from the pathways typically employed by Euryarchaeota methanogens. Additionally, while some Euryarchaeota methanogens are known to have fermentative capabilities, Methanosuratincolia members like LWZ-6 do not ferment sugars, peptides, or amino acids, indicating a more specialized metabolic strategy focused solely on methanogenesis. The differences in metabolic capabilities between Methanosuratincolia and Euryarchaeota methanogens highlight the diverse strategies employed by different methanogenic archaea to thrive in various environments.
What other novel methanogenic archaea might be discovered in the future, and how could they contribute to our understanding of the global methane cycle?
In the future, it is likely that additional novel methanogenic archaea will be discovered, expanding our knowledge of the diversity and metabolic capabilities of methane-producing microorganisms. These novel methanogens could belong to previously unexplored archaeal clades or phyla, similar to the case of Methanosuratincolia. By studying these newly discovered methanogens, researchers can gain insights into alternative pathways of methanogenesis, different substrate preferences, and unique ecological niches occupied by these microorganisms. Understanding the diversity of methanogenic archaea and their contributions to the global methane cycle is crucial for accurately modeling methane emissions, predicting the impact of environmental changes on methane production, and developing strategies to mitigate methane-related issues such as global warming.
