Albimonas pacifica sp nov., isolated from seawater of the Pacific, and emended description of the genus Albimonas

A Gram-stain-negative, aerobic, catalase- and oxidase-positive, non-flagellated, rod-shaped bacterium, designated strain P-50-3(T), was isolated from seawater of the Pacific. The strain grew at 10-40 degrees C (optimum at 30 degrees C) and with 0-12% (w/v, optimum 2%) NaCl. It reduced nitrate to nitrite but did not hydrolyse gelatin, starch or Tween 80. Analysis of 16S rRNA gene sequences showed that strain P-50-3(T) clustered tightly with the genus Albimonas and shared the highest 16S rRNA gene sequence similarity (94.3 %) with the type strain of Albimonas donghaensis. The major respiratory quinone was Q-10 and the major cellular fatty acids were C-18:1 omega 7c, C-18:0, 11-methyl C-18:1 omega 7c and C-16:0 Polar lipids included phosphatidylglycerol (PG), phosphatidylcholine (PC), two unidentified aminolipids and an unidentified lipid. The genomic DNA G+C content of strain P-50-3(T) was 69.0 mol%. On the basis of the data obtained in this polyphasic study, strain P-50-3(T) represents a novel species within the genus Albimonas, for which the name Albimonas pacifica sp. nov. is proposed. The type strain of Albimonas pacifica is P-50-3(T) (=KACC 16527(T)=CGMCC 1.11030(T)). An emended description of the genus Albimonas Lim et al. 2008 is also proposed.