1887

Abstract

A Gram-stain-negative, obligately aerobic bacterium, designated strain B6, was isolated from rice wine vinegar in the Republic of Korea. Cells were non-motile and oval short rods showing catalase-positive and oxidase-negative activities. Growth was observed at 15–45 °C (optimum, 30 °C) and pH 3.5–8.0 (optimum, pH 5.5–6.5). Strain B6 contained summed feature 8 (comprising Cω7 and/or C 6), and C as major fatty acids and ubiquinone-9 was identified as the sole isoprenoid quinone. The G+C content of the genomic DNA calculated from the whole genome was 53.1 mol%. Strain B6 was most closely related to LMG 1262 with very high 16S rRNA gene sequence similarity (100 %) and the strains formed a very close phylogenetic lineage together in phylogenetic trees based on 16S rRNA gene sequences. However, relatedness analyses based on concatenated amino acid sequences of 354 core genes and whole-cell MALDI-TOF profiles showed that strain B6 may form a distinct phyletic lineage from species. In addition, average nucleotide identity and DNA–DNA hybridization values between strain B6 and the type strains of species were less than 93.3 and 51.4 %, respectively. The genomic features of strain B6 were also differentiated from those of closely related type strains. Based on the phenotypic, chemotaxonomic and genomic features, strain B6 clearly represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is B6 (=KACC 21201=JCM 33371).

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2020-01-29
2020-02-28
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