Muricauda indica sp. nov., isolated from deep sea water

A taxonomic study was carried out on strain 3PC125-7 T , which was isolated from the deep sea water of the Indian Ocean. The bacterium was rod-shaped, non-flagellated, Gram-stain-negative, oxidase- and catalase-positive and strictly aerobic. Optimal growth was observed at 25-37 °C, at pH 7 and in 1-3 % (w/v) NaCl. On the basis of the results of 16S rRNA gene sequence analysis, strain 3PC125-7 T represents a member of the genus Muricauda, with the highest sequence similarity to Muricauda olearia CL-SS4 T (96.7 %), followed by Muricauda marina H19-56 T (96.7 %) and nine other species of the genus Muricauda (93.5-95.8 %). The principal fatty acids of 3PC125-7 T were iso-C 15 : 0 , iso-C 17 : 0 3-OH and iso-C 15 : 1 G and the sole respiratory quinone was menaquinone-6. The polar lipids comprise phosphatidylethanolamine, six unidentified phospholipids and three unknown lipids. The genomic DNA G+C content of 3PC125-7 T was 41.8 mol%. Based on the phylogenetic, phenotypic and chemotaxonomic data obtained in this study, strain 3PC125-7 T is considered to represent a novel species in the genus Muricauda, for which the name Muricaudaindica sp. nov. is proposed, with the type strain 3PC125-7 T (=MCCC 1A03198 T =KCTC 52318 T ).