Seohaeicola westpacificensis sp. nov., A Novel Member of Genera Seohaeicola Isolated from Deep West Pacific Sea Water

Strain JL2247^T, an aerobic, Gram-negative, gliding motile bacterium, was isolated from the western Pacific at the depth of 2,000 m. The cell was spindle-shaped with two narrow poles, and flagella were not observed. The colony was circular, translucent, and milky. This strain showed catalase-positive and oxidase-negative reactions. Its optimal growth conditions were at 32 °C, pH 7.3, and 3 % NaCl. The predominant polar lipids were phosphatidylcholine, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and phosphatidylmonomethylethanolamine. The major fatty acids were summed feature 8 (18:1 w7c and/or 18:1 w6c) and Cyclo C_19:0 ω8c and the major respiratory quinone was Q-10. The DNA G+C content of strain JL2247^T was 72.6 mol%. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain JL2247^T fell into the genus Seohaeicola, family Rhodobacteraceae, order Rhodobacterales, class Alphaproteobacteria, sharing the highest similarity with the only species Seohaeicola saemankumensis SD-15^T (96.4 % similarity). From the phenotypic, genotypic, and chemotaxonomic data, strain JL2247^T represents a novel species of the genus Seohaeicola and the name is proposed as Seohaeicola westpacificensis sp. nov. The type strain is JL2247^T (=CGMCC 1.12198^T = JCM18883).