title: Oceanithermus desulfurans sp. nov., a novel thermophilic, sulfur-reducing bacterium isolated from a sulfide chimney in Suiyo Seamount.
abstract: A novel thermophilic, microaerophilic, sulfur-reducing bacterium designated strain St55BT was isolated from a sulfide chimney in the hydrothermal field of Suiyo Seamount (Izu-Bonin Arc, Western Pacific). Cells of the isolate were rod-shaped and tended to form a chain-link circular structure (a rotund body) at exponential phase under good growth conditions. The isolate was a chemoheterotroph requiring yeast extract for growth. Although strain St55BT used oxygen as an electron acceptor, it could not form colonies in an oxygen concentration of more than 5 % (v/v). The isolate also used nitrate, nitrite or elemental sulfur in the absence of oxygen. A phylogenetic analysis based on the 16S rRNA gene sequence revealed that the isolate was closely related to Oceanithermus profundus, belonging to the phylum 'Deinococcus-Thermus' (sequence similarity 99.5 %). However, strain St55BT differed from O. profundus in terms of usage of electron donors, cellular fatty acid profile and DNA G + C content. In addition, a DNA-DNA hybridization test indicated low relatedness between the isolate and O. profundus. For the reasons given above, the name Oceanithermus desulfurans sp. nov. is proposed for strain St55BT (= NBRC 100063T = DSM 15757T).
authors.affiliation: Biological Resource Centre (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan.|Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Mori
authors.affiliation: Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kakegawa
authors.affiliation: Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
authors.forename: Yowsuke
authors.initials: Y
authors.lastname: Higashi
authors.affiliation: Institute for Marine Resource and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan.
authors.forename: Ko-Ichi
authors.initials: KI
authors.lastname: Nakamura
authors.affiliation: Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Maruyama
authors.affiliation: Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Hanada
mesh_terms: D000332:Aerobiosis; D015373:Bacterial Typing Techniques; D001482:Base Composition; D003470:Culture Media / Q000737:chemistry; D004269:DNA, Bacterial / Q000737:chemistry / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry / Q000302:isolation & purification; D005227:Fatty Acids / Q000032:analysis / Q000302:isolation & purification; D020459:Genes, rRNA; D006090:Gram-Negative Bacteria / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification* / Q000378:metabolism; D006358:Hot Temperature; D008969:Molecular Sequence Data; D009566:Nitrates / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D009693:Nucleic Acid Hybridization; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism; D010140:Pacific Ocean; D010461:Peptones / Q000378:metabolism; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D013440:Sulfides; D013455:Sulfur / Q000378:metabolism*; D013696:Temperature; D014871:Water Microbiology
chemical_list: D003470:Culture Media; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D009566:Nitrates; D009573:Nitrites; D010461:Peptones; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D013440:Sulfides; D013455:Sulfur; D010100:Oxygen