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Phycicoccus dokdonensis sp. nov., isolated from soil

Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Republic of Korea

Correspondence
Jung-Hoon Yoon
jhyoon{at}kribb.re.kr

A Gram-positive, non-motile, coccoid-shaped bacterium, designated strain DS-8^T, was isolated from soil from Dokdo, Korea, and its taxonomic position was investigated by using a polyphasic study. Strain DS-8^T grew optimally at 30 °C and pH 6.5–7.5 in the presence of 0.5–1.0 % (w/v) NaCl. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain DS-8^T joined the type strain of Phycicoccus jejuensis, with a bootstrap resampling value of 92.5 %, and shared 96.5 % 16S rRNA gene sequence similarity with P. jejuensis. The cell-wall peptidoglycan type was based on meso-diaminopimelic acid and the acyl type of the muramic acid was acetyl. The predominant menaquinone was MK-8(H₄). The major fatty acids were iso-C_{15 : 0} and iso-C_{16 : 0}. Major polar lipids detected in strain DS-8^T were phosphatidylinositol, phosphatidylglycerol, diphosphatidylglycerol and two unidentified phospholipids. The DNA G+C content was 70.7 mol%. DNA–DNA relatedness data and differential phenotypic properties, together with the phylogenetic distinctiveness, revealed that strain DS-8^T differs from P. jejuensis. On the basis of the data obtained, strain DS-8^T is considered to represent a novel species of the genus Phycicoccus, for which the name Phycicoccus dokdonensis sp. nov. is proposed. The type strain is DS-8^T (=KCTC 19248^T=CCUG 54521^T).

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