Genomes of Thaumarchaeota from deep sea sediments reveal specific adaptations of three independently evolved lineages.

ABSTRACT: Marine sediments represent a vast habitat for complex microbiomes. Among these, ammonia oxidizing archaea (AOA) of the phylum Thaumarchaeota are one of the most common, yet little explored, inhabitants, which seem extraordinarily well adapted to the harsh conditions of the subsurface biosphere. We present 11 metagenome-assembled genomes of the most abundant AOA clades from sediment cores obtained from the Atlantic Mid-Ocean ridge flanks and Pacific abyssal plains. Their phylogenomic placement reveals three independently evolved clades within the order Nitrosopumilales, of which no cultured representative is known yet. In addition to the gene sets for ammonia oxidation and carbon fixation known from other AOA, all genomes encode an extended capacity for the conversion of fermentation produc

SUBMITTER: Kerou M 

PROVIDER: S-EPMC8397731 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature