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

Actinomycete strain VC-A46T, 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-C16:0, C16:0 and C16:1 cis 9. The DNA G+C content of strain VC-A46T 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-A46T (=KCCM 42119T=NBRC 100940T) represents the type strain of a novel species, named Streptomyces cheonanensis sp. nov.