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A Cultured Greigite-Producing Magnetotactic Bacterium in a Novel Group of Sulfate-Reducing Bacteria
Science Magazine
  • Christopher T. Lefèvre, Institut de Biologie Environmentale et Biotechnologie
  • Nicholas Menguy, Institut de Minéralogie et de Physique des Milieux Condensés Université Pierre et Marie Curie
  • Fernanda Abreu, Universidade Federal do Rio de Janeiro
  • Ulysses Lins, Universidade Federal do Rio de Janeiro
  • Mihály Pósfai, University of Pannonia, Veszprém
  • Tanya Prozorov, U.S. Department of Energy
  • David Pignol, Université Aix-Marseille, Saint-Paul-lez-Durance
  • Richard B. Frankel, California Polytechnic State University - San Luis Obispo
  • Dennis A. Bazylinski, University of Nevada, Las Vegas
Publication Date
12-23-2011
Abstract
Magnetotactic bacteria contain magnetosomes—intracellular, membrane-bounded, magnetic nanocrystals of magnetite (Fe3O4) or greigite (Fe3S4)—that cause the bacteria to swim along geomagnetic field lines. We isolated a greigite-producing magnetotactic bacterium from a brackish spring in Death Valley National Park, California, USA, strain BW-1, that is able to biomineralize greigite and magnetite depending on culture conditions. A phylogenetic comparison of BW-1 and similar uncultured greigite- and/or magnetite-producing magnetotactic bacteria from freshwater to hypersaline habitats shows that these organisms represent a previously unknown group of sulfate-reducing bacteria in the Deltaproteobacteria. Genomic analysis of BW-1 reveals the presence of two different magnetosome gene clusters, suggesting that one may be responsible for greigite biomineralization and the other for magnetite.
Disciplines
Publisher statement
This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution.
Citation Information
Christopher T. Lefèvre, Nicholas Menguy, Fernanda Abreu, Ulysses Lins, et al.. "A Cultured Greigite-Producing Magnetotactic Bacterium in a Novel Group of Sulfate-Reducing Bacteria" Science Magazine Vol. 334 Iss. 6063 (2011) p. 1720 - 1723
Available at: http://works.bepress.com/rfrankel/183/