Streptomyces lasii sp. nov., a Novel Actinomycete with Antifungal Activity Isolated from the Head of an Ant (Lasius flavus)
During a screening for novel and biotechnologically useful actinobacteria in insects, a novel actinobacteria with antifungal activity, designated strain 5H-CA11T, was isolated from the head of an ant (Lasius flavus) and characterized using a polyphasic approach. The organism was found to have morphological and chemotaxonomic characteristics typical of members of the genus Streptomyces. 16S rRNA gene sequence analysis showed that strain 5H-CA11T is a member of the genus Streptomyces, with the highest sequence similarity to Streptomyces scabrisporus DSM 41855T (98.9%). Similarities to other type strains of the genus Streptomyces were lower than 96%. Phylogenetic analysis based on the 16S rRNA gene sequence also indicated that strain 5H-CA11T clusters with S. scabrisporus DSM 41855T using two tree-making algorithms. DNA–DNA hybridization between strain 5H-CA11T and S. scabrisporus JCM 11712T revealed 33.6% similarity, supporting the phenotypic and phylogenetic differences found between these two strains. Therefore, the strain is concluded to represent a novel species of the genus Streptomyces, for which the name Streptomyces lasii sp. nov. is proposed. The type strain is 5H-CA11T (=CGMCC 4.7303T = DSM 102043T).
This work was supported in part by the National Outstanding Youth Foundation grant 31225024 awarded to W.S.X, the National Key Technology R&D Program 2012BAD19B06 (to W.S.X), the National Natural Science Foundation of China (No. 31471832 and 31672092 to W.S.X, 31500010 to C.X.L, 31572070 and 31372006 to X.J.W), Chang Jiang Scholar Candidates Program for Provincial Universities in Heilongjiang (CSCP to X.J.W) and the “Young Talents” Project of Northeast Agricultural University (14QC02 to C.X.L). We are grateful to Prof. Aharon Oren for helpful advice on the specific epithet.
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