sp. nov., isolated from island soil.

A Gram-positive, non-motile, pale yellow coloured actinobacterial strain designated MMS17-SY077 was isolated from island soil, and its taxonomic position was investigated using a polyphasic approach. Strain MMS17-SY077 grew optimally at 30 °C, at pH 7 and in the absence of NaCl on Reasoner's 2A agar. Based on the 16S rRNA gene sequence analysis, the strain was assigned to the genus of the family , and the most related species were DSM 16388 (98.8 % sequence similarity), UMS-62 (98.1 %) and DS-10 (97.8 %). Strain MMS17-SY077 formed a distinct cluster within the clade in the phylogenetic tree. Genome-based comparative analyses confirmed a clear distinction between the strain and neighbouring species, as the highest orthologous average nucleotide identity and digital DNA-DNA hybridization values with other related species were 77.2 and 21.4% respectively, which were far below the cutoffs for species distinction. The diagnostic polar lipids of MMS17-SY077 were diphosphatidylglycerol and phosphatidylglycerol, and unidentified glycolipids and an unidentified aminolipid were also present. The main isoprenoid quinones were menaquinones with 11 and 12 isoprene units (MK-11 and MK-12), and main fatty acids were anteiso-C (34.4 %) and iso-C (33.2 %). The whole-cell hydrolysates contained rhamnose, ribose and galactose as diagnostic sugars, and l-2,4-diaminobutyric acid as the major diamino acid. The DNA G+C content was 72.1 mol %. Based on phenotypic, chemotaxnomic and phylogenetic characterization, strain MMS17-SY077 should be classified as representing a new species of the genus , for which the name sp. nov. is proposed (type strain MMS17-SY077=KCTC 49423=LMG 31762).