title: Desulfovibrio magneticus sp. nov., a novel sulfate-reducing bacterium that produces intracellular single-domain-sized magnetite particles.
abstract: A novel type of dissimilatory sulfate-reducing bacterium, designated strain RS-1T, capable of producing intracellular magnetite particles (magnetosomes) was isolated from freshwater sulfide-rich sediments. Phylogenetic analysis based on 16S rDNA sequences revealed that RS-1T is a member of the genus Desulfovibrio. Its closest known relative is Desulfovibrio burkinensis (sequence similarity of 98.7%). Strain RS-1T contains desulfoviridin, c-type cytochromes and, unlike other Desulfovibrio spp., it possesses menaquinone MK-7(H2) instead of MK-6 or MK-6(H2). Strain RS-1T is also unique compared with other members of Desulfovibrio in its ability to synthesize intracellular magnetite particles. A novel species, Desulfovibrio magneticus sp. nov., is proposed for RS-1T (= ATCC 700980T = DSM 13731T), a sulfate-reducing magnetotactic bacterium.
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Sakaguchi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Arakaki
authors.forename: Tadashi
authors.initials: T
authors.lastname: Matsunaga
mesh_terms: D004275:DNA, Ribosomal / Q000032:analysis; D003901:Desulfovibrio / Q000145:classification* / Q000378:metabolism* / Q000502:physiology; D005227:Fatty Acids / Q000032:analysis; D052203:Ferrosoferric Oxide; D005618:Fresh Water / Q000382:microbiology; D019015:Geologic Sediments / Q000382:microbiology; D050885:Hydrogensulfite Reductase; D007501:Iron / Q000378:metabolism*; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D010087:Oxides / Q000378:metabolism*; D050862:Oxidoreductases Acting on Sulfur Group Donors / Q000378:metabolism; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013431:Sulfates / Q000378:metabolism*
chemical_list: D004275:DNA, Ribosomal; D005227:Fatty Acids; D010087:Oxides; D012336:RNA, Ribosomal, 16S; D013431:Sulfates; D007501:Iron; D050862:Oxidoreductases Acting on Sulfur Group Donors; D050885:Hydrogensulfite Reductase; D052203:Ferrosoferric Oxide