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Rubellimicrobium aerolatum sp. nov., isolated from an air sample in Korea

¹ Applied Microbiology Division, National Institute of Agricultural Science and Technology, Rural Development Administration, Suwon 441-707, Republic of Korea
² Korean Agricultural Culture Collection (KACC), Microbial Genetics Division, National Institute of Agricultural Biotechnology, Rural Development Administration, Suwon 441-707, Republic of Korea

Correspondence
Soon-Wo Kwon
swkwon{at}rda.go.kr

A pink-coloured bacterial strain, designated 5715S-9^T, was isolated from an air sample collected in Suwon, Republic of Korea. The cells were strictly aerobic, Gram-negative, non-spore-forming, non-flagellated and short-rod-shaped. On the basis of 16S rRNA gene sequence analysis, the organism was a member of the genus Rubellimicrobium, showing the highest sequence similarities with Rubellimicrobium mesophilum MSL-20^T (96.2 % sequence similarity) and Rubellimicrobium thermophilum DSM 16684^T (93.9 %). The major polar lipids were phosphatidylglycerol, phosphatidylcholine, diphosphatidylglycerol, phosphatidylethanolamine and an unidentified glycolipid. The major fatty acids (>10 %) were C_{18 : 1}7c, C_{16 : 0} and 11-methyl C_{18 : 1}7c. The G+C content of the DNA was 69 mol%. On the basis of both phylogenetic and phenotypic evidence, strain 5715S-9^T represents a novel species of the genus Rubellimicrobium, for which the name Rubellimicrobium aerolatum sp. nov. is proposed. The type strain is 5715S-9^T (=KACC 12504^T=DSM 19297^T).

A transmission electron micrograph of cells of strain 5715S-9^T and two-dimensional thin-layer chromatograms of polar lipid extracts obtained from strain 5715S-9^T and Rubellimicrobium thermophilum DSM 16684^T are available as supplementary material with the online version of this paper.