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1 Department of Microbiology, College of Natural Sciences and Research Center for Molecular Microbiology, Seoul National University, Seoul 151-742, Republic of Korea
2 Department of Agricultural and Environmental Science, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK
3 Department of Biology, College of Natural Sciences, Sunchon National University, Sunchon 540-742, Republic of Korea
4 Korea Collection for Type Cultures, Korea Research Institute of Bioscience and Biotechnology, PO Box 115, Yusong, Taejon 305-600, Republic of Korea
5 Division of Life Sciences, Chungbuk National University, Gaeshin-dong, Cheongju, Chungbuk 361-763, Republic of Korea
Author for correspondence: Michael Goodfellow. Tel: +44 191 222 7706. Fax: +44 191 222 5228. e-mail: m.goodfellow{at}ncl.ac.uk
ABSTRACT
A soil isolate, which had been assigned to the genus Nocardia, was shown to have properties consistent with its classification in the genus Amycolatopsis. An almost complete nucleotide sequence of the 16S rDNA of the strain was determined following cloning and sequencing of the amplified gene. The sequence was aligned with those available for members of the family Pseudonocardiaceae and related taxa and phylogenetic trees were inferred using three tree-making algorithms. The organism consistently formed a distinct monophyletic clade with the type strain of Amycolatopsis methanolica, but DNA-DNA relatedness data showed that the two strains belonged to distinct genomic species. The organism was also distinguished from the type strains of all validly described species of Amycolatopsis using a battery of phenotypic properties. The genotypic and phenotypic data show that the strain merits recognition as a new species of the genus Amycolatopsis. The name proposed for the new species is Amycolatopsis thermoflava sp. nov. The type strain is IFO 14333T.
Key Words: Amycolatopsis thermoflava sp. nov. • polyphasic taxonomy • 16S rDNA sequencing
The GenBank accession numbers for 16S rDNA sequences of Amycolatopsis alba DSM 44262T, Amycolatopsis coloradensis NRRL 3218T, Amycolatopsis coloradensis DSM 46092T and Amycolatopsis thermoflava N1165T are AF051340, AF051341, AF051343 and AF052390, respectively.
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