Physiological basis for atmospheric methane oxidation and methanotrophic growth on air.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
16 May 2024
16 May 2024
Historique:
received:
13
02
2024
accepted:
22
04
2024
medline:
17
5
2024
pubmed:
17
5
2024
entrez:
16
5
2024
Statut:
epublish
Résumé
Atmospheric methane oxidizing bacteria (atmMOB) constitute the sole biological sink for atmospheric methane. Still, the physiological basis allowing atmMOB to grow on air is not well understood. Here we assess the ability and strategies of seven methanotrophic species to grow with air as sole energy, carbon, and nitrogen source. Four species, including three outside the canonical atmMOB group USCα, enduringly oxidized atmospheric methane, carbon monoxide, and hydrogen during 12 months of growth on air. These four species exhibited distinct substrate preferences implying the existence of multiple metabolic strategies to grow on air. The estimated energy yields of the atmMOB were substantially lower than previously assumed necessary for cellular maintenance in atmMOB and other aerobic microorganisms. Moreover, the atmMOB also covered their nitrogen requirements from air. During growth on air, the atmMOB decreased investments in biosynthesis while increasing investments in trace gas oxidation. Furthermore, we confirm that a high apparent specific affinity for methane is a key characteristic of atmMOB. Our work shows that atmMOB grow on the trace concentrations of methane, carbon monoxide, and hydrogen present in air and outlines the metabolic strategies that enable atmMOB to mitigate greenhouse gases.
Identifiants
pubmed: 38755154
doi: 10.1038/s41467-024-48197-1
pii: 10.1038/s41467-024-48197-1
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4151Subventions
Organisme : Norges Forskningsråd (Research Council of Norway)
ID : 295910
Organisme : Norges Forskningsråd (Research Council of Norway)
ID : 315129
Informations de copyright
© 2024. The Author(s).
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