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Streptomyces cheonanensis sp. nov., a novel streptomycete with antifungal activity

Laboratory of Molecular Plant Pathology, College of Life and Environmental Sciences, Korea University, Seoul 136-713, Korea

Correspondence
Byung Kook Hwang
bkhwang{at}korea.ac.kr

Actinomycete strain VC-A46^T, which exhibits antifungal activity, was isolated from a soil sample collected from Cheonan, Korea. The strain was determined to belong to the genus Streptomyces, based on its morphological and chemotaxonomic characteristics. The cell wall of this strain contained LL-diaminopimelic acid. The predominant fatty acids were iso-C_{16 : 0}, C_{16 : 0} and C_{16 : 1} cis 9. The DNA G+C content of strain VC-A46^T was 75·5 mol%. Phylogenetic analysis of the 16S rRNA gene sequence of this strain revealed that it differed from those of the described streptomycetes available in public databases. Analyses of DNA–DNA relatedness data, together with data regarding the strain's morphological, physiological and biochemical characteristics, also confirmed that this strain constitutes a novel Streptomyces taxon, which is distinguishable from closely related reference strains. Therefore, it is proposed that strain VC-A46^T (=KCCM 42119^T=NBRC 100940^T) represents the type strain of a novel species, named Streptomyces cheonanensis sp. nov.

Published online ahead of print on 13 October 2005 as DOI 10.1099/ijs.0.63816-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of S. cheonanensis VC-A46^T is AY822606.

A scanning electron micrograph, a -region-based neighbour-joining tree and details of the fatty acid content analysis and DNA–DNA hybridization experiments are available as supplementary material in IJSEM Online.

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