1887

Abstract

The taxonomic characteristics of two bacterial strains, FH5 and SS4, isolated from enrichment cultures obtained from two distinct marine environments, were determined. These bacteria were Gram-stain-negative, facultatively anaerobic rods. Growth occurred at 20–40 °C (optimum, 28–32 °C), pH 5.5–9.0 (optimum, pH 7.0–7.5) and in the presence of 1–7 % NaCl (optimum, 2–4 %). The major cellular fatty acids were anteiso-C and iso-C. Menaquinone 7 (MK-7) was the sole respiratory quinone. The major polar lipids were phosphatidylethanolamine, an unkown phospholipid and an unknown lipid. The DNA G+C contents of strains FH5 and SS4 were both determined to be 42.0 mol%. The results of DNA–DNA hybridization studies indicated that the FH5 and SS4 genomes share greater than 95 % relatedness. The strains formed a distinct phyletic line within the class , with less than 89.4 % sequence similarity to their closest relatives with validly published names. On the basis of physiological and biochemical characteristics, 16S rRNA gene sequences and chemical properties, a novel genus and species, gen. nov., sp. nov., within the class , are proposed, with strain FH5 ( = DSM 25947 = CICC 10585) as the type strain. In addition, a new family, fam. nov., is proposed to accommodate gen. nov.

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2014-05-01
2019-10-14
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