Desulfamplus magnetovallimortis gen. nov., sp. nov., a magnetotactic bacterium from a brackish desert spring able to biomineralize greigite and magnetite,that represents a novel lineage in the Desulfobacteraceae |
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Authors: | Elodie C.T. Descamps Caroline L. Monteil Nicolas Menguy Nicolas Ginet David Pignol Dennis A. Bazylinski Christopher T. Lefèvre |
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Affiliation: | 1. CNRS/CEA/Aix-Marseille Université, UMR7265 Institut de biosciences et biotechnologies, Laboratoire de Bioénergétique Cellulaire, 13108 Saint Paul lez Durance, France;2. Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590 CNRS—UPMC—MNHN—Sorbonne Université, 4 place Jussieu, 75252 Paris Cedex 05, France;3. CNRS/Aix-Marseille Université, UMR7283 Laboratoire de Chimie Bactérienne, 13009 Marseille, France;4. School of Life Sciences, University of Nevada at Las Vegas, Las Vegas, NV 89154-4004, USA |
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Abstract: | A magnetotactic bacterium, designated strain BW-1T, was isolated from a brackish spring in Death Valley National Park (California, USA) and cultivated in axenic culture. The Gram-negative cells of strain BW-1T are relatively large and rod-shaped and possess a single polar flagellum (monotrichous). This strain is the first magnetotactic bacterium isolated in axenic culture capable of producing greigite and/or magnetite nanocrystals aligned in one or more chains per cell. Strain BW-1T is an obligate anaerobe that grows chemoorganoheterotrophically while reducing sulfate as a terminal electron acceptor. Optimal growth occurred at pH 7.0 and 28 °C with fumarate as electron donor and carbon source. Based on its genome sequence, the G + C content is 40.72 mol %. Phylogenomic and phylogenetic analyses indicate that strain BW-1T belongs to the Desulfobacteraceae family within the Deltaproteobacteria class. Based on average amino acid identity, strain BW-1T can be considered as a novel species of a new genus, for which the name Desulfamplus magnetovallimortis is proposed. The type strain of D. magnetovallimortis is BW-1T (JCM 18010T–DSM 103535T). |
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Keywords: | BW-1 Magnetotactic bacteria Greigite Magnetite Magnetotaxis Magnetosome Sulfate-reducing bacteria |
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