A novel marine actinomycete, designated strain SSW1-48, was isolated from a dried seaweed sample collected from a beach in Jeju, Republic of Korea. Cells of the organism were non-motile, non-endospore-forming, Gram-positive and rod-shaped. Colonies were circular, smooth, translucent and yellow-coloured. The diagnostic diamino acid in the peptidoglycan was 2,4-diaminobutyric acid and the murein was of the acetyl type. Mycolic acids were absent. The predominant menaquinones were MK-10 and MK-9. The major fatty acids were anteiso-C and iso-C. The G+C content of the DNA was 73.0 mol%. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that the isolate formed a distinct branch between and in the family . The values for 16S rRNA gene sequence similarity between strain SSW1-48 and type strains of recognized species were in the range 95.5–97.5 % and those between this bacterium and other representatives of the family were in the range 93.7–96.4 %. On the basis of the combined data from the phenotypic and phylogenetic analyses, strain SSW1-48 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is SSW1-48 (=KCTC 19198=JCM 14256).


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Transmission electron micrograph of cells of strain SSW1-48 ( sp. nov.). [PDF](319 KB)


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