title: Thermaerobacter nagasakiensis sp. nov., a novel aerobic and extremely thermophilic marine bacterium.
abstract: A novel, extremely thermophilic bacterium was isolated from a shallow marine hydrothermal vent at depth of 22 m in Tachibana Bay, Nagasaki Prefecture, Japan. Cells were gram-negative, non-spore-forming, motile rods. Growth was observed between 52 and 78 degrees C (optimum 70 degrees C), pH 5 and 8 (optimum pH 7) and 0-4.5% NaCl (optimum 1.0%). The isolate was a strictly aerobic heterotroph utilizing yeast extract and trypticase peptone. The G+C content of the genomic DNA is 69 mol%. Analysis of 16S rDNA sequences indicated that strain Ts1a is closely related to Thermaerobacter marianensis. The differences in physiology and DNA-DNA similarity between strain Ts1a and T. marianensis showed that strain Ts1a represents a new species of Thermaerobacter. The type strain of T. nagasakiensis is strain Ts1a (=JCM11223, DSM 14512).
authors.affiliation: Laboratory of Marine Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan. takuro@kais.kyoto-u.ac.jp
authors.forename: Takuro
authors.initials: T
authors.lastname: Nunoura
authors.forename: Saki
authors.initials: S
authors.lastname: Akihara
authors.forename: Ken
authors.initials: K
authors.lastname: Takai
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Sako
mesh_terms: D001406:Bacillaceae / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification* / Q000648:ultrastructure; D001420:Bacteria, Aerobic / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification* / Q000648:ultrastructure; D004269:DNA, Bacterial / Q000032:analysis; D006358:Hot Temperature; D010802:Phylogeny; D012623:Seawater; D017422:Sequence Analysis, DNA; D014871:Water Microbiology
chemical_list: D004269:DNA, Bacterial