Mucibacter soli gen. nov., sp. nov., a new member of the family Chitinophagaceae producing mucin

A Gram-stain-negative, mucus-forming, motile by gliding, non-spore-forming and short rod-shaped bacterial strain designated R1-15 T was isolated from soil and its taxonomic position was evaluated using a polyphasic approach. Strain R1-15 T grew at 15–37°C (optimum, 30°C), at pH 6–7 (optimum, pH 6) and in the presence of 0–1% (w/v) NaCl (optimum, 0%) on 0.1X TSA. On the basis of 16S rRNA gene sequence similarity, the novel strain was assigned to the family Chitinophagaceae of the phylum Bacteroidetes , and its closest related taxa were species of the genera Taibaiella (88.76–90.02% sequence similarity), Lacibacter (89.24–90.00%), Chitinophaga (88.61–89.76%), and Terrimonas (89.04%). Flexirubin- type pigments were produced. The only isoprenoid quinone was MK-7, and the major polar lipid was phosphatidylethanolamine. Based on whole genome comparisons between the strain R1-15 T and the type strains of relatives, the orthologous average nucleotide identity values were 66.9–67.0%. The DNA G + C content of strain R1-15 T was 43.8 mol%. The combination of phylogenetic, chemotaxonomic and phenotypic data clearly supported separation of strain R1-15 T from related taxa, and thus the name Mucibacter soli gen. nov., sp. nov. is proposed. The type strain is R1-15 T (= KCTC 62274 T = JCM 31190 T ).