The taxonomic status of sp. Y-11, which was described as a squalene-degrading bacterium, was investigated by chemotaxonomic and genetic methods. The strain possesses wall chemotype IV, MK-9(H) as the predominant menaquinone, mycolic acids, and straight-chain, saturated and monounsaturated fatty acids, with considerable amounts of tuberculostearic acid. The DNA G+C content is 67.5 mol%. 16S rRNA gene sequence analysis and quantitative DNA-DNA hybridization experiments provided strong evidence that strain Y-11represents a new species within the genus , for which the name sp. nov. is proposed. The type strain of is strain Y-11(= IFO 14764).


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