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Pelagibius litoralis gen. nov., sp. nov., a marine bacterium in the family Rhodospirillaceae isolated from coastal seawater

¹ Open and Tropical Ocean Research Division, Korea Ocean Research and Development Institute, Ansan 426-744, Republic of Korea
² School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, Shillim-dong, Kwanak-gu, Seoul 151-742, Republic of Korea

Correspondence
Byung Cheol Cho
bccho{at}snu.ac.kr

A Gram-negative, strictly aerobic, slightly curved rod-shaped bacterial strain, designated CL-UU02^T, was isolated from coastal seawater off the east coast of Korea. 16S rRNA gene sequence analysis revealed a clear affiliation of this novel strain with the family Rhodospirillaceae. Strain CL-UU02^T formed a robust cluster with the type strains of species of the genus Rhodovibrio at 16S rRNA gene sequence similarity levels of 89.9–90.4 %. Strain CL-UU02^T shared no more than 89 % 16S rRNA gene sequence similarity with the type strains of other species in the family Rhodospirillaceae. Strain CL-UU02^T was able to grow in the presence of 2–6 % sea salts, and grew optimally at 28–30 °C and pH 7–8. The DNA G+C content of strain CL-UU02^T was 66.3 mol%. On the basis of phylogenetic analyses and chemotaxonomic and physiological data, strain CL-UU02^T is considered to represent a novel species of a new genus in the family Rhodospirillaceae, for which the name Pelagibius litoralis gen. nov., sp. nov. is proposed. The type strain of Pelagibius litoralis is CL-UU02^T (=KCCM 42323^T=JCM 15426^T).

An extended neighbour-joining tree based on 16S rRNA gene sequences showing the position of strain CL-UU02^T among members of the family Rhodospirillaceae is available as supplementary material with the online version of this paper.