Muricauda sediminis sp. nov., isolated from western Pacific Ocean sediment

A Gram-stain-negative bacterium, designated strain 40Bstr401^T, was isolated from a sediment sample collected from the western Pacific Ocean. Analysis of its 16S rRNA gene sequence revealed that strain 40Bstr401^T belongs to the genus Muricauda and is closely related to type strains Muricauda antarctica Ar-22^T (98.2 %), Muricauda taeanensis 105^T (98.2 %) and Muricauda beolgyonensis BB-My12^T (97.4 %). The average nucleotide identity values for 40Bstr401^T with M. antarctica Ar-22^T and M. taeanensis 105^T are 79.3 % and 78.8 %, respectively. The in silico DNA-DNA hybridization values between strain 40Bstr401^T and M. antarctica Ar-22^T and M. taeanensis 105^T are 26.7 and 26.6 %, respectively. The major isoprenoid quinone of 40Bstr401^T is MK-6, and iso-C_17 : 0 3-OH and iso-C_15 : 0 are the dominant cellular fatty acids. The major polar lipids are phosphatidylethanolamine, four unidentified amino lipids and two unidentified lipids. The G+C content of the genomic DNA is 42.9 mol%. Its phylogenetic distinctiveness and chemotaxonomic differences, together with the phenotypic properties observed in this study, indicate that strain 40Bstr401^T can be differentiated from closely related species. Therefore, we propose strain 40Bstr401^T represents a novel species in the genus Muricauda, for which the name Muricauda sediminis sp. nov. is suggested. The type strain is 40Bstr401^T (=MCCC 1K04568^T=KCTC 82139^T).