Sandaracinobacteroides hominis gen. nov., sp. nov., isolated from human skin

Strain SZY PN-1(T), representing a novel Gram-negative, aerobic, non-motile, rod-shaped and yellow-pigmented bacterium, was isolated from a skin sample of a healthy Chinese male. Growth occurred at pH 6.0-8.0 (optimum, pH 7.0) and 10-37 degrees C (optimum, 30 degrees C) with 0-1.0% (w/v) NaCl in R2A agar. Comparative analysis of the 16S rRNA gene sequences revealed that strain SZY PN-1(T) shared high similarities with two invalid-published species, Sandaracinobacter sibiricus RB16-17 (97.1%) and Sandaracinobacter neustonicus JCM 30734 (96.6%), respectively. Phylogenetic analysis of 16S rRNA gene sequences together with protein-concatemer tree showed that SZY PN-1(T) formed a separate branch within the family Sphingosinicellaceae. The DNA G + C content of the strain SZY PN-1(T) was 65.0% (genome). The polar lipid profile included phosphatidylethanolamine, phosphatidylglycerol, two sphingoglycolipids, diphosphatidylglycerol, five unidentified glycolipids, and seven unidentified lipids. The predominant fatty acids (> 10.0%) were identified as C-18:1 omega 7c and/or C-18:1 omega 6c, C-17:1 omega 6c, C-16:1 omega 7c and/or C-16:1 omega 6c. The major respiratory quinone was Q-10. Based on the phenotypic and genotypic features, a novel genus and species, Sandaracinobacteroides hominis gen. nov., sp. nov. is proposed, with type strain SZY PN-1(T) (= KCTC 82150 (T) = NBRC 114675(T)).

Automated summary

Strain SZY PN-1(T) is a novel Gram-negative, yellow-pigmented bacterium isolated from a skin sample of a healthy Chinese male. It shares high similarities with two invalid-published species, forming a separate branch within the family Sphingosinicellaceae based on phylogenetic analysis. A new genus and species, Sandaracinobacteroides hominis gen. nov., sp. nov., is proposed based on its phenotypic and genotypic features.