1887

Abstract

The taxonomic relationships of two actinomycetes provisionally assigned to the genus were determined using a polyphasic taxonomic approach. The generic assignment was confirmed by 16S rRNA gene similarity data, as the organisms, strains MTCC 1534 and W 4937, were shown to belong to the subclade. These organisms had phenotypic properties typical of rhodococci; they were aerobic, Gram-positive, weakly acid-fast actinomycetes that showed an elementary branching-rod–coccus growth cycle and contained -diaminopimelic acid, arabinose and galactose in whole-organism hydrolysates, -glycolated muramic acid residues, dehydrogenated menaquinones with eight isoprene units as the predominant isoprenologue and mycolic acids that co-migrated with those extracted from the type strain of . The strains had identical phenotypic profiles and belong to the same genomic species, albeit one distinguished from , with which they formed a distinct phyletic line. They were also distinguished from representatives of all of the species classified in the 16S rRNA gene tree using a set of phenotypic features. The genotypic and phenotypic data show that the strains merit recognition as a novel species of . The name proposed is sp. nov., with the type strain W 4937 (=DSM 44689=NCTC 13296).

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2004-03-01
2020-01-27
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