Unique phylogenies and metabolic adaptations of novel lineage III and comammox <i>Nitrospira</i> species from deep-sea sediments.

ABSTRACT: The genus Nitrospira, which includes canonical nitrite-oxidizing bacteria (NOB) and species capable of complete ammonia oxidation (comammox), plays an important role in the global biogeochemical nitrogen cycle. Typically, lineage IV Nitrospira predominate in marine environments, and other lineages are thought to be less abundant and remain poorly characterized in oceanic systems. Here, we recovered five novel metagenome-assembled genomes (MAGs) affiliated with Nitrospira lineage II-IV from deep-sea sediments. Notably, two of these MAGs represent members of lineage III and comammox Nitrospira, respectively, suggesting the presence of previously uncharacterized lineages in the deep sea. Phylogenetic and gene locus analyses indicated that deep-sea lineage III and c

SUBMITTER: Chen G 

PROVIDER: S-EPMC12903955 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature