Streptomyces solincola sp. nov., isolated from soil in Malaysia

A urease-producing Gram-stain-positive actinobacterium, designated strain T5(T), was isolated from a soil sample collected at a highway hillslope in Selangor, Malaysia. The strain was found to produce pale yellowish--pink aerial mycelia with smooth long chain spores and extensively branched light yellowish-pink substrate mycelia on oatmeal agar. Strain T5(T) grew at 15-37 degrees C, pH 6-11, and tolerated up to 9% (w/v) NaCl, with optimal growth occurring at 28 degrees C, pH 6-9 and without NaCl. The whole-cell sugar hydrolysate of strain T5(T) contained galactose, glucose and ribose. The ll-diaminopimelic acid isomer was detected in the cell wall. Diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and phosphatidylinositol were found to be the predominant polar lipids. The main fatty acids were anteiso-C-17:0, iso-C-16:0, anteiso-C-15:0 and iso-C-14:0. Comparative analysis of the 16S rRNA gene sequences indicated that strain T5(T) belonged to Streptomyces of the family Streptomycetaceae with the highest 16S rRNA gene sequence similarity to Streptomyces lichenis LCR6-01(T) (99.0 %). The overall genome relatedness indices revealed that the closest related species was S. lichenis LCR6-01(T) with 89.4 % average nucleotide identity and 33.7% digital DNA-DNA hybridization. Phylogeny analyses showed that strain T5(T) was closely related to Streptomyces fradiae, Streptomyces lavendofoliae, Streptomyces lichenis, Streptomyces roseolilacinus and Streptomyces somaliensis. Based on these polyphasic data, strain T5(T) represents a novel species, for which the name Streptomyces solincola sp. nov. is proposed. The type strain is T5(T) (=TBRC 5137(T)= DSM 42166(T)).