title: Intracellular iron minerals in a dissimilatory iron-reducing bacterium.
abstract: Among prokaryotes, there are few examples of controlled mineral formation; the formation of crystalline iron oxides and sulfides [magnetite (Fe3O4) or greigite (Fe3S4)] by magnetotactic bacteria is an exception. Shewanella putrefaciens CN32, a Gram-negative, facultative anaerobic bacterium that is capable of dissimilatory iron reduction, produced microscopic intracellular grains of iron oxide minerals during growth on two-line ferrihydrite in a hydrogen-argon atmosphere. The minerals, formed at iron concentrations found in the soil and sedimentary environments where these bacteria are active, could represent an unexplored pathway for the cycling of iron by bacteria.
authors.affiliation: Department of Microbiology, College of Biological Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada. sglasaue@micro.uoguelph.ca
authors.forename: Susan
authors.initials: S
authors.lastname: Glasauer
authors.forename: Sean
authors.initials: S
authors.lastname: Langley
authors.forename: Terry J
authors.initials: TJ
authors.lastname: Beveridge
mesh_terms: D015169:Colony Count, Microbial; D003460:Crystallization; D003470:Culture Media; D003594:Cytoplasmic Granules / Q000737:chemistry / Q000648:ultrastructure; D005290:Ferric Compounds / Q000032:analysis / Q000378:metabolism*; D005293:Ferritins / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D008280:Magnetics; D008854:Microscopy, Electron; D008903:Minerals / Q000032:analysis / Q000378:metabolism*; D010084:Oxidation-Reduction; D020614:Shewanella putrefaciens / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D013057:Spectrum Analysis
chemical_list: D003470:Culture Media; D005290:Ferric Compounds; D008903:Minerals; C000499:ferric oxide; C092844:ferric oxyhydroxide; D005293:Ferritins; D007501:Iron