1887

Abstract

A coccoid and amorphous-shaped, non-gliding, proteorhodopsin-containing, yellow bacterium, designated strain SG-18, was isolated from seawater in the western North Pacific Ocean near Japan. The strain was Gram-stain-negative, obligately aerobic, heterotrophic and oxidase-positive. It hydrolysed aesculin but not DNA, urea, gelatin or agar. Growth occurred in the presence of 1–5 % NaCl, with optimum growth at 2 % NaCl. The strain grew at 15–37 °C with an optimum temperature of 25–30 °C. The DNA G+C content of the genomic DNA of strain SG-18 was 47.0 mol% (HPLC). The predominant isoprenoid quinone was MK-6, and major cellular fatty acids were iso-C G, iso-C, iso-C 3-OH. Phylogenetic trees generated by using 16S rRNA gene sequences revealed that strain SG-18 belonged to the family and showed 92.7 % sequence similarity to the most closely related species, DOKDO 025. On the basis of phenotypic and phylogenetic features, strain SG-18 is classified as representing a novel species of a new genus within the family , for which the name gen. nov., sp. nov. is proposed. The type strain of the type species is SG-18 ( = NBRC 108814 = KCTC 23967).

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2013-05-01
2019-08-18
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