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Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth
The second largest sink for atmospheric methane (CH(4)) is atmospheric methane oxidizing-bacteria (atmMOB). How atmMOB are able to sustain life on the low CH(4) concentrations in air is unknown. Here, we show that during growth, with air as its only source for energy and carbon, the recently isolate...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827875/ https://www.ncbi.nlm.nih.gov/pubmed/33445466 http://dx.doi.org/10.3390/microorganisms9010153 |
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author | Tveit, Alexander Tøsdal Schmider, Tilman Hestnes, Anne Grethe Lindgren, Matteus Didriksen, Alena Svenning, Mette Marianne |
author_facet | Tveit, Alexander Tøsdal Schmider, Tilman Hestnes, Anne Grethe Lindgren, Matteus Didriksen, Alena Svenning, Mette Marianne |
author_sort | Tveit, Alexander Tøsdal |
collection | PubMed |
description | The second largest sink for atmospheric methane (CH(4)) is atmospheric methane oxidizing-bacteria (atmMOB). How atmMOB are able to sustain life on the low CH(4) concentrations in air is unknown. Here, we show that during growth, with air as its only source for energy and carbon, the recently isolated atmospheric methane-oxidizer Methylocapsa gorgona MG08 (USCα) oxidizes three atmospheric energy sources: CH(4), carbon monoxide (CO), and hydrogen (H(2)) to support growth. The cell-specific CH(4) oxidation rate of M. gorgona MG08 was estimated at ~0.7 × 10(−18) mol cell(−1) h(−1), which, together with the oxidation of CO and H(2), supplies 0.38 kJ Cmol(−1) h(−1) during growth in air. This is seven times lower than previously assumed necessary to support bacterial maintenance. We conclude that atmospheric methane-oxidation is supported by a metabolic flexibility that enables the simultaneous harvest of CH(4), H(2) and CO from air, but the key characteristic of atmospheric CH(4) oxidizing bacteria might be very low energy requirements. |
format | Online Article Text |
id | pubmed-7827875 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-78278752021-01-25 Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth Tveit, Alexander Tøsdal Schmider, Tilman Hestnes, Anne Grethe Lindgren, Matteus Didriksen, Alena Svenning, Mette Marianne Microorganisms Article The second largest sink for atmospheric methane (CH(4)) is atmospheric methane oxidizing-bacteria (atmMOB). How atmMOB are able to sustain life on the low CH(4) concentrations in air is unknown. Here, we show that during growth, with air as its only source for energy and carbon, the recently isolated atmospheric methane-oxidizer Methylocapsa gorgona MG08 (USCα) oxidizes three atmospheric energy sources: CH(4), carbon monoxide (CO), and hydrogen (H(2)) to support growth. The cell-specific CH(4) oxidation rate of M. gorgona MG08 was estimated at ~0.7 × 10(−18) mol cell(−1) h(−1), which, together with the oxidation of CO and H(2), supplies 0.38 kJ Cmol(−1) h(−1) during growth in air. This is seven times lower than previously assumed necessary to support bacterial maintenance. We conclude that atmospheric methane-oxidation is supported by a metabolic flexibility that enables the simultaneous harvest of CH(4), H(2) and CO from air, but the key characteristic of atmospheric CH(4) oxidizing bacteria might be very low energy requirements. MDPI 2021-01-12 /pmc/articles/PMC7827875/ /pubmed/33445466 http://dx.doi.org/10.3390/microorganisms9010153 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tveit, Alexander Tøsdal Schmider, Tilman Hestnes, Anne Grethe Lindgren, Matteus Didriksen, Alena Svenning, Mette Marianne Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth |
title | Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth |
title_full | Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth |
title_fullStr | Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth |
title_full_unstemmed | Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth |
title_short | Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth |
title_sort | simultaneous oxidation of atmospheric methane, carbon monoxide and hydrogen for bacterial growth |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827875/ https://www.ncbi.nlm.nih.gov/pubmed/33445466 http://dx.doi.org/10.3390/microorganisms9010153 |
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