Kosmotoga pacifica sp. nov., a thermophilic chemoorganoheterotrophic bacterium isolated from an East Pacific hydrothermal sediment

Type Article
Date 2014-01
Language English
Author(s) L'Haridon Stephane1, 2, 3, Jiang Lijing4, Alain Karine1, 2, 3, Chalopin MorganeORCID1, 2, 3, Rouxel Ouafae1, 2, 3, Beauverger Mikael1, 2, 3, Xu Hongxiu4, Shao Zongze4, Jebbar Mohamed1, 2, 3
Affiliation(s) 1 : Univ Bretagne Occidentale, IUEM, LMEE, UEB,UMR 6197, F-29280 Plouzane, France.
2 : CNRS, IUEM, LMEE, UMR 6197, F-29280 Plouzane, France.
3 : IFREMER, LMEE, UMR 6197, F-29280 Plouzane, France.
4 : SOA, Inst Oceanog 3, Key Lab Marine Biogenet Resources, Xiamen 361005, Peoples R China.
Source Extremophiles (1431-0651) (Springer Japan Kk), 2014-01 , Vol. 18 , N. 1 , P. 81-88
DOI 10.1007/s00792-013-0596-7
WOS© Times Cited 11
Keyword(s) Thermotogales, Kosmotoga, Kosmotoga pacifica, Hydrothermal sediment
Abstract A novel strictly anaerobic thermophilic heterotrophic bacterium, strain SLHLJ1T, was isolated from a Pacific hydrothermal sediment. Cells were Gram-negative coccobacilli (approximately 1.0 × 0.6 μm) with a toga. It grew at temperatures between 33 and 78 °C (optimum 70 °C). Elemental sulphur and l-cystine stimulated its growth. It contained C16:0, C16:1 ω11c, C18:0 and C18:1 ω9c as major fatty acids (>5 %), 3 phospholipids and 2 glycolipids as polar lipids. Its DNA G+C content was 43.7 mol%. Phylogenetic analyses based on 16S rRNA gene sequences placed strain SLHLJ1T within the family Thermotogaceae. The novel isolate was most closely related to Kosmotoga arenicorallina (97.93 % 16S rRNA gene sequence similarity), K. olearia (92.43 %) and K. shengliensis (92.17 %). On the basis of phenotypic, chemotaxonomic and phylogenetic comparisons with its closest relatives, we propose its assignment to a novel species of the genus Kosmotoga. The name Kosmotoga pacifica sp. nov. is proposed with strain SLHLJ1T (=DSM 26965T = JCM 19180T = UBOCC 3254T) as the type species.
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L'Haridon Stephane, Jiang Lijing, Alain Karine, Chalopin Morgane, Rouxel Ouafae, Beauverger Mikael, Xu Hongxiu, Shao Zongze, Jebbar Mohamed (2014). Kosmotoga pacifica sp. nov., a thermophilic chemoorganoheterotrophic bacterium isolated from an East Pacific hydrothermal sediment. Extremophiles, 18(1), 81-88. Publisher's official version : https://doi.org/10.1007/s00792-013-0596-7 , Open Access version : https://archimer.ifremer.fr/doc/00171/28204/