Mechanisms of extracellular electron transfer in anaerobic methanotrophic archaea.
Nat Commun
; 15(1): 1477, 2024 Feb 17.
Article
em En
| MEDLINE
| ID: mdl-38368447
ABSTRACT
Anaerobic methanotrophic (ANME) archaea are environmentally important, uncultivated microorganisms that oxidize the potent greenhouse gas methane. During methane oxidation, ANME archaea engage in extracellular electron transfer (EET) with other microbes, metal oxides, and electrodes through unclear mechanisms. Here, we cultivate ANME-2d archaea ('Ca. Methanoperedens') in bioelectrochemical systems and observe strong methane-dependent current (91-93% of total current) associated with high enrichment of 'Ca. Methanoperedens' on the anode (up to 82% of the community), as determined by metagenomics and transmission electron microscopy. Electrochemical and metatranscriptomic analyses suggest that the EET mechanism is similar at various electrode potentials, with the possible involvement of an uncharacterized short-range electron transport protein complex and OmcZ nanowires.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Bactérias
/
Archaea
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article