1887

Abstract

The taxonomic status of a mycolic acid-containing actinomycete, isolated from a natural cave on Jeju Island, Republic of Korea, was investigated by means of a polyphasic approach. The isolate, designated strain N2-11, produced yellow- to orange-coloured vegetative hyphae and white- to pinkish white-coloured aerial mycelia, both of which fragmented into irregular rod-shaped elements. Phylogenetic analyses based on 16S rRNA gene sequences revealed that the organism belonged to the family , occupying a distinct position between and a cluster. The results of chemotaxonomic analyses were consistent with the affiliation of the organism with the genus . On the basis of 16S rRNA gene sequence similarities, the closest phylogenetic neighbours were the type strains of (98.3 %), (98.0 %), (97.9 %) and (97.8 %), but the organism could be clearly distinguished from its phylogenetic relatives with reference to a broad range of physiological markers. On the basis of phenotypic and molecular genetic data presented in this study, strain N2-11 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is N2-11 (=JBRI 2006 =KCTC 19223 =DSM 45078).

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2007-12-01
2020-01-29
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Extended neighbour-joining tree based on 16S rRNA gene sequences showing the phylogenetic position of strain N2-11 within the genus . [PDF](24 KB)

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Cellular fatty acid compositions of strain N2-11 and its phylogenetically close neighbours of the genus . [PDF](15 KB)

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