RRC ID 15994
Author Lefèvre CT, Menguy N, Abreu F, Lins U, Pósfai M, Prozorov T, Pignol D, Frankel RB, Bazylinski DA.
Title A cultured greigite-producing magnetotactic bacterium in a novel group of sulfate-reducing bacteria.
Journal Science
Abstract Magnetotactic bacteria contain magnetosomes--intracellular, membrane-bounded, magnetic nanocrystals of magnetite (Fe(3)O(4)) or greigite (Fe(3)S(4))--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.
Volume 334(6063)
Pages 1720-3
Published 2011-12-23
DOI 10.1126/science.1212596
PII 334/6063/1720
PMID 22194580
MeSH California Crystallization Culture Media Deltaproteobacteria / classification Deltaproteobacteria / genetics Deltaproteobacteria / isolation & purification* Deltaproteobacteria / metabolism Ecosystem Ferrosoferric Oxide / analysis Ferrosoferric Oxide / metabolism Fresh Water / microbiology Genes, rRNA Genome, Bacterial Geologic Sediments / microbiology Iron / analysis Iron / metabolism* Magnetic Phenomena* Magnetosomes / chemistry* Natural Springs / microbiology* Oxidation-Reduction Phylogeny RNA, Ribosomal, 16S / genetics Salinity Sulfates / metabolism* Sulfides / analysis Sulfides / metabolism* Water Microbiology*
IF 41.058
Times Cited 90
General Microbes JCM 18010