Abstract
A Gram-stain-positive actinobacterial strain, designated F23T, was isolated from marine sediment collected from the western Pacific. Strain F23T showed less than 94.5 % 16S rRNA gene sequence similarity with type strains of species with validly published names. Phylogenetic analysis, based on 16S rRNA gene sequences, revealed that the novel isolate formed a distinct monophyletic clade within the family Brevibacteriaceae and clustered distantly with the genera Brevibacterium and Spelaeicoccus. Cells of strain F23T were non-motile, rod-shaped and aerobic to microaerophilic. Optimal growth occurred at 35-37 °C, at pH 8.0-9.0 and in the presence of 1 % NaCl (w/v). The isolate contained meso-diaminopimelic acid as the characteristic cell-wall diamino acid, MK-8(H2) and MK-7(H2) as the predominant menaquinones and anteiso-C15 : 0 and anteiso-C17 : 0 as the major fatty acids. The DNA G+C content of strain F23T was 69.0 mol%. On the basis of phylogenetic analysis, phenotypic and chemotaxonomic characteristics and 16S rRNA gene signature nucleotide patterns, strain F23T represents a novel species in a novel genus in the family Brevibacteriaceae, for which the name Sediminivirga luteola gen. nov., sp. nov. is proposed. The type strain is F23T ( = JCM 19771T = CGMCC 1.12785T = MCCC 1A09945T).
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