Marihabitans

Abstract

Ma.ri.ha'bi.tans. L. neut. n. mare sea; L. part. adj. habitans inhabiting; N.L. adj. used as a neut. subst. Marihabitans inhabitant of the sea. “Actinobacteria” / Actinobacteria / Micrococcales / Intrasporangiaceae / Marihabitans Cells are Gram‐stain‐positive, nonmotile, non‐spore‐forming, catalase‐positive, aerobic, and irregular short rods and cocci isolated from surface seawater, deep seawater, and marine sponges, which are 0.9–1.4 μm wide and 1.2–1.7 μm long. The peptidoglycan is of the A type and contains meso ‐A 2 pm, alanine, and glutamic acid. The cell‐wall sugars are galactose, glucose, and ribose. Mycolic acids are absent. The major menaquinone is MK‐8(H 4 ). The phospholipids comprise phosphatidylglycerol, an unknown phospholipid, diphosphatidylglycerol, and phosphatidylinositol mannosides. Phylogenetically, the genus is a member of the family Intrasporangiaceae . Most closely related taxon is the genus Kribbia in the 16S rRNA gene‐based phylogenetic tree. The similarity value of the 16S rRNA gene sequence is 96.3% between the type species, Marihabitans asiaticum HG667 T and Kribbia dieselivorans N113 T . Marihabitans is distinguishable from Kribbia by the absence of saturated fatty acids in the predominant fatty acid profile. The genome sequence of the type species is 2,953,873 bp, and 2,694 protein‐coding genes are predicted. The calculated G + C content is 71.1%. DNA G + C content (mol%) : 71.1% (genome sequence); 70 (HPLC). Type species : Marihabitans asiaticum Kageyama et al. 2008 VP .