Nitrite-driven anaerobic methane oxidation by oxygenic bacteria (Record no. 46468)

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control field MX-MdCICY
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control field 20250625140706.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-12257
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Title Nitrite-driven anaerobic methane oxidation by oxygenic bacteria
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Volume/sequential designation Nature, 464, p.543-548, 2010
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Summary, etc. Only three biological pathways are known to produce oxygen: photosynthesis, chlorate respiration and the detoxification of reactive oxygen species.Herewepresent evidence for a fourth pathway, possibly of considerable geochemical and evolutionary importance. The pathway was discovered after metagenomic sequencing of an enrichment culture that couples anaerobic oxidation of methane with the reduction of nitrite to dinitrogen. The complete genome of the dominant bacterium, named 'CandidatusMethylomirabilis oxyfera', was assembled. This apparently anaerobic, denitrifying bacterium encoded, transcribed and expressed the well-established aerobic pathway for methane oxidation, whereas it lacked known genes for dinitrogen production. Subsequent isotopic labelling indicated that 'M. oxyfera' bypassed the denitrification intermediate nitrous oxide by the conversion of two nitric oxidemolecules to dinitrogen and oxygen,whichwas used to oxidizemethane.These results extend our understanding of hydrocarbon degradation under anoxic conditions and explain the biochemical mechanism of a poorly understood freshwater methane sink. Because nitrogen oxides were already present on early Earth, our finding opens up the possibility that oxygen was available to microbial metabolism before the evolution of oxygenic photosynthesis.
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Personal name Ettwig, K.F.
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Personal name Butler, M.K.
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Personal name Le Paslier, D.
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Uniform Resource Identifier <a href="https://drive.google.com/file/d/16VsI70hguT__4ktDVqZN-qLVSY0dPlIZ/view?usp=drivesdk">https://drive.google.com/file/d/16VsI70hguT__4ktDVqZN-qLVSY0dPlIZ/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-12257 25.06.2025 25.06.2025 Documentos solicitados