Nitrogen fixation in the widely distributed marine γ-proteobacterial diazotroph <i>Candidatus</i> Thalassolituus haligoni.

ABSTRACT: The high diversity and global distribution of heterotrophic bacterial diazotrophs (HBDs) in the ocean has recently become apparent. However, understanding the role these largely uncultured microorganisms play in marine N₂ fixation poses a challenge due to their undefined growth requirements and the complex regulation of the nitrogenase enzyme. We isolated and characterized Candidatus Thalassolituus haligoni, a member of a widely distributed clade of HBD belonging to the Oceanospirillales. Analysis of its nifH gene via amplicon sequencing revealed the extensive distribution of Cand. T. haligoni across the Pacific, Atlantic, and Arctic Oceans. Pangenome analysis indicates that the isolate shares >99% identity with an uncultured metagenome-assembled genome call

SUBMITTER: Rose SA 

PROVIDER: S-EPMC11290528 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature