論文 - 詳細
| RRC ID | 34302 |
|---|---|
| 著者 | Miyazaki M, Sakai S, Yamanaka Y, Saito Y, Takai K, Imachi H. |
| タイトル | Spirochaeta psychrophila sp. nov., a psychrophilic spirochaete isolated from subseafloor sediment, and emended description of the genus Spirochaeta. |
| ジャーナル | Int J Syst Evol Microbiol |
| Abstract |
An obligately anaerobic, psychrophilic spirochaete, strain MO-SPC1(T), was isolated from a methanogenic microbial community grown in a continuous-flow bioreactor. Originally, this community was obtained from subseafloor sediments off the Shimokita Peninsula of Japan in the north-western Pacific Ocean. The cells were motile, Gram-stain-negative, helical, 0.25-0.55×3.6-15 µm, with a wavelength of approximately 0.5-0.6 µm. Strain MO-SPC1(T) grew at 0-18 °C (optimally at 15 °C), at pH 6.0-7.5 (optimally at pH 6.8-7.0) and in 20-70 g NaCl l(-1) (optimally at 30-40 NaCl l(-1)). The strain grew chemo-organotrophically with mono-, di- and polysaccharides. The major end products of glucose fermentation were acetate, ethanol, hydrogen and carbon dioxide. The abundant polar lipids of strain MO-SPC1(T) were diphosphatidylglycerol, phosphatidylglycerol, unknown phospholipids and an unknown lipid. The major cellular fatty acids (>5% of the total) were C(14 : 0), C(16 : 0), iso-C(13 : 0), iso-C(14 : 0), iso-C(15 : 0), anteiso-C(13 : 0) and anteiso-C(15 : 0). To the best of our knowledge, this is the first report of the fatty acids iso-C(13 : 0) and anteiso-C(13 : 0) from a species of the genus Spirochaeta. Isoprenoid quinones were not found. The G+C content of the genomic DNA was 39.8 mol%. 16S rRNA gene sequence-based phylogenetic analysis showed that strain MO-SPC1(T) was affiliated with the genus Spirochaeta, and its closest relatives were Spirochaeta isovalerica MA-2(T) (95.6% sequence identity) and Spirochaeta litoralis R1(T) (89.4%). Based on its phenotypic characteristics and phylogenetic traits, strain MO-SPC1(T) is placed in a separate taxon at the level of a novel species within the genus Spirochaeta, for which the name Spirochaeta psychrophila sp. nov. is proposed, reflecting its true psychrophilic physiology. The type strain is MO-SPC1(T) ( = JCM 17280(T) = DSM 23951(T)). To our knowledge, this is the first report of an isolate of the phylum Spirochaetes from a deep-sea sedimentary environment, and of an obligately psychrophilic nature. |
| 巻・号 | 64(Pt 8) |
| ページ | 2798-2804 |
| 公開日 | 2014-8-1 |
| DOI | 10.1099/ijs.0.062463-0 |
| PMID | 24860115 |
| MeSH | Bacterial Typing Techniques Base Composition Bioreactors / microbiology* DNA, Bacterial / genetics Fatty Acids / chemistry Geologic Sediments / microbiology* Japan Molecular Sequence Data Phospholipids / chemistry Phylogeny RNA, Ribosomal, 16S / genetics Seawater / microbiology Sequence Analysis, DNA Spirochaeta / classification* Spirochaeta / genetics Spirochaeta / isolation & purification |
| IF | 2.415 |
| 引用数 | 13 |
| WOS 分野 | MICROBIOLOGY |
| オルトメトリクス指標 |
オルトメトリクス指標項目
|
| 最多言及媒体 | |
| 各媒体での言及数の合計 | 1 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 一般微生物 | JCM 17280 |