Streptomyces yaanensis sp. nov., isolated from soil.

A novel actinomycete, designated Z4(T), was isolated from soil in Yaan, Sichuan Province, south China. The taxonomic status of this strain was established using a polyphasic approach. The morphological and chemotaxonomic characteristics of the organism are typical of the members of the genus Streptomyces. Phylogenetic analysis based on the almost complete 16S rRNA gene sequence indicated that strain Z4(T) belonged to the genus Streptomyces, branching off next to Streptomyces durhamensis ATCC 23194(T) (98.7 %), Streptomyces puniciscabiei KACC 20253(T) (98.7 %) and Streptomyces filipinensis ATCC 23905(T) (98.6 %). However, DNA-DNA hybridization studies and phenotypic differences between strain Z4(T) and closely related species of the genus Streptomyces suggested that strain Z4(T) represented a different genomic species. It is therefore proposed that Z4(T) ( = CGMCC 4.7035(T) = KCTC 29111(T)) represents the type strain of a novel species of the genus Streptomyces, for which the name Streptomyces yaanensis sp. nov. is proposed.