Streptomyces xinjiangensis sp. nov., an actinomycete isolated from Lop Nur region

A novel actinobacterial strain, designated LPA192T, was isolated from a soil sample collected from Lop Nur, Xinjiang Uygur Autonomous Region, Northwest China. A polyphasic approach was used to investigate the taxonomic position of strain LPA192T. The isolate showed morphological and chemotaxonomic characteristics typical of members of the genus Streptomyces. Peptidoglycan was found to contain LL-diaminopimelic acid as the diagnostic diamino acid. The predominant menaquinones were MK-9(H6) and MK-10(H4). Polar lipids were phosphatidylethanolamine, diphosphatidylglycerol and phosphatidylinositol. Major cellular fatty acids consist of C16:0, anteiso-C15:0 and C18:1ω9c. The sugar in whole-cell hydrolysates was mannose. Phylogenetic analysis indicated that strain LPA192T is closely related to Streptomyces tanashiensis LMG 20274T (99.3 %), Streptomyces gulbargensis DAS131T (99.3 %), Streptomyces nashvillensis NBRC 13064T (99.3 %), Streptomyces roseolus NBRC 12816T (99.2 %) and Streptomyces filamentosus NBRC 12767T (99.1 %) while showing below 98.5 % sequencing similarities with other validly published Streptomyces species. However, DNA–DNA relatedness values between LPA192T and the closely related type strains were below 40 %, which are much lower than 70 % threshold value for species delineation. The genomic DNA G + C content of strain LPA192T was 69.3 mol %. Based on the differences in genotypic and phenotypic characteristics from the closely related strains, strain LPA192T is considered to represent a novel species of the genus Streptomyces for which the name Streptomycesxinjiangensis sp. nov. is proposed. The type strain is LPA192T (=KCTC 39601T = CGMCC 4.7288T).