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Int J Syst Evol Microbiol 57 (2007), 1956-1959; DOI  10.1099/ijs.0.64770-0
© 2007 International Union of Microbiological Societies

Rhodococcus kyotonensis sp. nov., a novel actinomycete isolated from soil

Bing Li, Keiko Furihata, Lin-Xian Ding and Akira Yokota

Institute of Molecular and Cellular Biosciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-0032, Japan

Correspondence
Bing Li
aa67047{at}mail.ecc.u-tokyo.ac.jp

A polyphasic study was undertaken to establish the taxonomic position of an isolate, strain DS472T, from soil in Kyoto, Japan. Phylogenetic analysis, based on the 16S rRNA gene sequences, revealed that this strain constitutes a new subline within the genus Rhodococcus, with Rhodococcus yunnanensis YIM 70056T and Rhodococcus fascians DSM 20669T as its nearest phylogenetic neighbours (98.2 and 97.8 % sequence similarity, respectively). DNA–DNA hybridization experiments revealed 36 and 29 % relatedness between the isolate and its phylogenetic relatives, R. yunnanensis and R. fascians, respectively. Chemotaxonomic characteristics, including the major quinone MK-8(H2), predominant fatty acids C16 : 0, C18 : 1{omega}9c and 10-methyl C18 : 0, the presence of cell-wall chemotype IV and mycolic acids, were consistent with the properties of members of the genus Rhodococcus. The DNA G+C content was 64.5 mol%. On the basis of both phenotypic and genotypic evidence, strain DS472T represents a novel species of the genus Rhodococcus, for which the name Rhodococcus kyotonensis sp. nov. is proposed. The type strain is strain DS472T (=IAM 15415T=CCTCC AB206088T).

Abbreviations: DAP, diaminopimelic acid

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain DS472T is AB269261.

The characteristics that distinguish strain DS472T from the closely related species of the genus Rhodococcus are presented in a supplementary table available with the online version of this paper.






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Copyright © 2007 by the International Union of Microbiological Societies.