Abstract
A novel Gram-stain-positive bacterium, designated R19-04(T), was isolated from a soil sample from Rishiri Island, Japan, and its taxonomic position was investigated by a polyphasic approach. Cells of strain R19-04( T) exhibited a rod-coccus cycle. The peptidoglycan type of the isolate was A4alpha; lysine was the diagnostic diamino acid. The predominant menaquinone was MK-8(H(2)) and the major fatty acid was anteiso-C(15 : 0). The polar lipids were diphosphatidylglycerol and phosphatidylglycerol. The DNA G+C content was 72.9 mol%. Phylogenetic analysis based on 16S rRNA gene sequence comparisons revealed that strain R19-04(T) represented a novel member of the suborder Micrococcineae. Its nearest phylogenetic neighbours were the members of the genus Oerskovia, with 16S rRNA gene sequence similarity of 97.0-97.1 %. However, strain R19-04(T) was clearly distinguishable from members of the genus Oerskovia and phylogenetically related genera in terms of chemotaxonomic characteristics. On the basis of the chemotaxonomic and phylogenetic characteristics, a novel genus and species are proposed, Luteimicrobium subarcticum gen. nov., sp. nov. The type strain of Luteimicrobium subarcticum is R19-04(T) (=NBRC 105647(T) =DSM 22413(T)).
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