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- Volume 63, Issue 3
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f Magnetococcus marinus gen. nov., sp. nov., a marine, magnetotactic bacterium that represents a novel lineage (Magnetococcaceae fam. nov., Magnetococcales ord. nov.) at the base of the Alphaproteobacteria
- Authors: Dennis A. Bazylinski1 , Timothy J. Williams2 , Christopher T. Lefèvre3 , Ryan J. Berg4 , Chuanlun L. Zhang5,6 , Samuel S. Bowser7 , Annette J. Dean8 , Terrence J. Beveridge9,†
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- VIEW AFFILIATIONS
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1 1Department of Biological Sciences, University of Nevada at Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, USA 2 2School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia 3 3Laboratoire de Bioénergétique Cellulaire, UMR 6191, CEA Cadarache, DSV, IBEB, Saint-Paul-lez-Durance, F-13108, France 4 4Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA 5 5Savannah River Ecology Laboratory, University of Georgia, Drawer E, Aiken, SC 29802, USA 6 6Department of Marine Sciences, University of Georgia, Athens, GA 30602, USA 7 7Division of Translational Medicine, Wadsworth Center, New York State Department of Health, PO Box 509, Albany, NY 12201, USA 8 8Pioneer Hi-Bred, Int’l Inc., 7300 NW 62nd Avenue, Johnston, IA 50131-1004, USA 9 9Department of Microbiology, College of Biological Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
- Correspondence Dennis A. Bazylinski [email protected]
- First Published Online: 01 March 2013, International Journal of Systematic and Evolutionary Microbiology 63: 801-808, doi: 10.1099/ijs.0.038927-0
- Subject: New Taxa - Proteobacteria
- Cover date:




Magnetococcus marinus gen. nov., sp. nov., a marine, magnetotactic bacterium that represents a novel lineage (Magnetococcaceae fam. nov., Magnetococcales ord. nov.) at the base of the Alphaproteobacteria , Page 1 of 1
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Magnetotactic bacteria are a morphologically, metabolically and phylogenetically disparate array of bacteria united by the ability to biomineralize membrane-encased, single-magnetic-domain mineral crystals (magnetosomes) that cause the cell to orientate along the Earth’s geomagnetic field. The most commonly observed type of magnetotactic bacteria is the ubiquitous magnetotactic cocci, which comprise their own phylogenetic group. Strain MC-1T, a member of this group, was isolated from water collected from the oxic–anoxic interface of the Pettaquamscutt Estuary in Rhode Island, USA, and cultivated in axenic culture. Cells of strain MC-1T are roughly spherical, with two sheathed bundles of flagella at a single pole (bilophotrichous). Strain MC-1T uses polar magnetotaxis, and has a single chain of magnetite crystals per cell. Cells grow chemolithoautotrophically with thiosulfate or sulfide as the electron donors, and chemo-organoheterotrophically on acetate. During autotrophic growth, strain MC-1T relies on the reductive tricarboxylic acid cycle for CO2 fixation. The DNA G+C content is 54.2 mol%. The new genus and species Magnetococcus marinus gen. nov., sp. nov. are proposed to accommodate strain MC-1T ( = ATCC BAA-1437T = JCM 17883T), which is nominated as the type strain of Magnetococcus marinus. A new order (Magnetococcales ord. nov.) and family (Magnetococcaceae fam. nov.) are proposed for the reception of Magnetococcus and related magnetotactic cocci, which are provisionally included in the Alphaproteobacteria as the most basal known lineage of this class.
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†
Deceased.
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The GenBank/EMBL/DDBJ accession number for the complete and annotated genome sequence of strain MC-1T is CP000471.
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A supplementary table is available with the online version of this paper.
© 2013 IUMS | Published by the Microbiology Society
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