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Abstract

A Gram-stain-negative, strictly aerobic bacterium, designated HC1, was isolated from an air conditioner in South Korea. Cells were orange, non-motile cocci with oxidase- and catalase-positive activities and did not contain bacteriochlorophyll . Growth of strain HC1 was observed at 10–45 °C (optimum, 30 °C), pH 4.5–9.5 (optimum, pH 7.0) and 0–3 % (w/v) NaCl (optimum, 0 %). Strain HC1 contained summed feature 8 (comprising Cω7c/ ω6), C and cyclo-Cω8 as the major fatty acids and ubiquinone-10 as the sole isoprenoid quinone. Phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and an unknown aminolipid were detected as the major polar lipids. The major carotenoid was hydroxyspirilloxanthin. The G+C content of the genomic DNA was 70.1 mol%. Phylogenetic analysis, based on 16S rRNA gene sequences, showed that strain HC1 formed a phylogenetic lineage within the genus . Strain HC1 was most closely related to the type strains of , , and with 98.1, 97.9, 97.6 and 96.8 % 16S rRNA gene sequence similarities, respectively, but the DNA–DNA relatedness values between strain HC1 and closely related type strains were less than 70 %. Based on phenotypic, chemotaxonomic and molecular properties, strain HC1 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is HC1 (=KACC 19097=JCM 31878).

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2017-10-01
2020-09-30
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