Hydrogen Oxidation Benefits Alphaproteobacterial Methanotrophs Under Severe Methane Limitation.

ABSTRACT: Hydrogen (H₂) and methane (CH₄) are produced in the anoxic layers of wetlands and sediments. In the overlaying oxygenated surface layers, these gases become available for oxidation by aerobic hydrogenotrophic and methanotrophic microorganisms. While H₂ oxidation by verrucomicrobial methane-oxidising bacteria (MOB) is extensively studied, less is known about this metabolism in MOB from the class Alphaproteobacteria, which frequently inhabit wetlands. We show that Methylocystis bryophila H2s^T, Methylocapsa aurea KYG^T, and "Methylosinus acidophilus" 29 encode diverse hydrogenases, instantly oxidise H₂ when cultivated under CH₄-limited and low-oxygen conditions, under which hydrogenase transcription is upregulated com

SUBMITTER: Peterse IF 

PROVIDER: S-EPMC12319191 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature