Luteibaculum oceani gen. nov., sp. nov., a carotenoid-producing, lipolytic bacterium isolated from surface seawater, and emended description of the genus Owenweeksia Lau et al. 2005

A yellow-pigmented, Gram-staining-negative, strictly aerobic, rod-shaped, non-flagellated, non-spore-forming, lipolytic and gliding marine bacterium designated strain CC-AMWY-103BTwas isolated from surface seawater collected at Kending, Taiwan. The strain shared the highest 16S rRNA gene sequence similarity of 89.4 % withOwenweeksia hongkongensisJCM 12287TandBrumimicrobium mesophilumYH207T, and established a distinct phyletic lineage associated with the members of the familyCryomorphaceae. The polar lipid profile of strain CC-AMWY-103BTconsisted of phosphatidylethanolamine, ten unidentified lipids and four unidentified aminolipids. The major fatty acids (>5 % of the total) were iso-C15 : 0, iso-C15 : 1G, C15 : 1ω5c, iso-C17 : 03-OH and C15 : 1ω8c. The DNA G+C content was 44.2±0.3 mol%. The predominant respiratory quinone was menaquinone-6 (MK-6) and the major polyamine was spermidine. Based on its genetic, phylogenetic, phenotypic and chemotaxonomic distinctiveness, strain CC-AMWY-103BTis proposed to represent a distinct member of the familyCryomorphaceae, for which the nameLuteibaculum oceanigen. nov., sp. nov. is proposed; the type strain ofLuteibaculum oceaniis CC-AMWY-103BT( = JCM 18817T = BCRC 80551T). An emended description of the genusOwenweeksiais also proposed.