Muricauda lutaonensis sp. nov., a moderate thermophile isolated from a coastal hot spring

A yellow-pigmented, Gram-staining-negative, aerobic, non-motile, moderately thermophilic, rod-shaped bacterium, designated strain CC-HSB-11^T, was isolated from a coastal hot spring of Green Island (Lutao), located off Taituang, Taiwan. 16S rRNA gene sequence analysis demonstrated that it shared <94.4 % sequence similarity with Muricauda species. Menaquinone with six isoprene units (MK-6) was the major respiratory quinone and iso-C_{15 : 0}, iso-C_{15 : 1} G, iso-C_{15 : 0} 3-OH, iso-C_{16 : 0} 3-OH, iso-C_{17 : 0} 3-OH and summed feature 3 (comprising iso-C_{15 : 0} 2-OH and/or C_{16 : 1}ω7c/t) were the predominant fatty acids. The predominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Six unidentified phospholipids and glycolipids also occurred as minor components. The DNA G+C content of strain CC-HSB-11^T was 46.4±1 mol%. On the basis of 16S rRNA gene sequence similarities with other Muricauda species and differentiating fatty acid compositions and other phenotypic data, strain CC-HSB-11^T represents a novel species in the genus Muricauda, for which the name Muricauda lutaonensis sp. nov. is proposed. The type strain is CC-HSB-11^T (=BCRC 17850^T =KCTC 22339^T).