1887

Abstract

A Gram-stain-negative, facultatively anaerobic, gliding, yellow-pigmented bacterium, designated SS12, was isolated from shark gill homogenate and characterized using a polyphasic approach. The strain was catalase-positive and oxidase-negative. Optimal growth occurred at 28–30 °C, pH 7.0–7.5 and in the presence of 2–4 % (w/v) NaCl. The DNA G+C content was 40.0 mol%. The strain contained MK-7 as the prevailing menaquinone; iso-C and anteiso-C as the major cellular fatty acids; and phosphatidylethanolamine and an unknown lipid as the predominant polar lipids. Comparative analysis of 16S rRNA gene sequences demonstrated that the novel isolate showed the highest sequence similarity (94.68 %) to DSM 9555 and the sequence similarities among the type strains of all other species studied were less than 92 %. A phylogenetic tree, based on 16S rRNA gene sequences, showed that strain SS12 and DSM 9555 formed a distinct cluster within the family . On the basis of its phylogenetic position and phenotypic traits, strain SS12 represents a novel species of genus , for which the name sp. nov. is proposed. The type strain is SS12 ( = CICC 10590 = DSM 27040). Emended descriptions of the genus and are also provided.

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2014-07-01
2019-10-22
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