Spirosoma luteolum sp. nov. isolated from water

다국어 초록 (Multilingual Abstract)

A novel Gram-negative and rod-shaped bacterial strain, designatedas 16F6ET, was isolated from a water sample. Cellswere yellowish in color and catalase- and oxidase-positive.
The strain grew at 10–37°C (optimum at 25°C) but not at 4and 42°C, and pH 5–7 (optimum at pH 7). It showed moderateresistance to gamma-ray irradiation. Comparative phylogeneticanalysis showed that strain 16F6ET belonged to thefamily Cytophagaceae of the class Cytophagia. Furthermore,this isolate showed relatively low 16S rRNA gene sequencesimilarities (90.7–93.1%) to the members of the genus Spirosoma.
The major fatty acids were summed feature 3 (C16:1ω7c/C16:1 ω6c), C16:1 ω5c, C16:0 N alcohol, and C16:0. The polarlipid profile indicated presence of phosphatidylethanolamine,unknown aminophospholipids, an unknown amino lipid,unknown phospholipids, and unknown polar lipids. The predominantisoprenoid quinone was MK-7. The genomic DNAG+C content of strain 16F6ET was 56.5 mol%. Phenotypic,phylogenetic, and chemotaxonomic properties indicated thatisolate 16F6ET represents a novel species within the genusSpirosoma, for which the name Spirosoma luteolum sp. nov.
is proposed. The type strain is 16F6ET (=KCTC 52199T =JCM31411T).

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