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Article Abstract
A Gram-stain-negative, non-motile and rod-shaped bacterium, designated as strain W52, was isolated from deep seawater of the Mariana Trench and characterized phylogenetically and phenotypically. The strain could grow at 10-47 °C (optimum 32 °C), at pH 5.0-8.0 (optimum 6.0) and with 0-9% NaCl (optimum 3 %, w/v). The results of phylogenetic analysis based on 16S rRNA gene sequences indicated that W52 was related to members of the genus and shared the highest identity with 501str8 (99.0 %), followed by JCM 11811, DSM 13258, 40DY170, KCTC 23501 and 12C25 with 97.0-98.8 % sequence similarity. 16S rRNA gene sequence identities between W52 and other members of the genus were below 97.0 %. The major respiratory quinone was MK-6. The polar lipids were phosphatidylethanolamine (PE), one unidentified aminolipid and three unidentified lipids. The strain had iso-C, iso-C 3-OH and iso-CG as the major fatty acids. The G+C content of the genomic DNA was 41.7 %. The combined genotypic and phenotypic data indicated that strain W52 represents a novel species of the genus , for which the name sp. nov. is proposed, with the type strain W52 (=MCCC 1K05111= KCTC 82315).
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