The reductive acetyl-CoA pathway coupled to methanogenesis is likely one of Earth's oldest metabolisms. Yet, until recently this metabolism had only been found in the kingdom Euryarchaeota. A study now suggests that distantly related Bathyarchaeota are also methanogens and that methane metabolism is more phylogenetically widespread than previously thought.
Keywords: Archaea; Bathyarchaeota; methanogenesis; methylotrophy; microbial carbon cycling; reductive acetyl-CoA pathway.
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