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  • Title: Streptomyces tailanensis sp. nov., an actinomycete isolated from riverside silt.
    Author: Sun B, Xia Z, Yuan L, Wan C, Zhang L.
    Journal: Int J Syst Evol Microbiol; 2020 Apr; 70(4):2760-2765. PubMed ID: 32195647.
    Abstract:
    A novel actinobacterium, designated TRM68348T, was isolated from the silt collected from the Tailan River in Xinjiang Province, north-west China. The strain was aerobic and Gram-stain-positive. The aerial mycelium was densely straight or tortuous, with a few branches of hyphae and no spores. The whole-cell sugar pattern of strain TRM68348T consisted of ribose and glucose. The diagnostic diamino was ll-diaminopimelic acid. The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, phosphatidylinositol, phosphatidylinositol mannose and an unidentified phospholipid. The predominant menaquinones were MK-9 (H10), MK-9 (H6) and MK-9 (H2). The major fatty acids (>5 %) were iso-C14 : 0, iso-C15 : 0, anteiso-C15 : 0, iso-C16 : 0, C16 : 0 and summed feature 6. The G+C content of the genomic DNA was 69.93 mol%. Phylogenetic analysis showed that strain TRM68348T shared 16S rRNA gene sequence similarity of 98.14 % to the closest described species Streptomyces capitiformicae 1H-SSA4T. Strain TRM68348T had a relatively low DNA-DNA relatedness value with S. capitiformicae 1H-SSA4T as determined by calculating the average nucleotide identity value (92.78 %). Strain TRM68348T could also be differentiated from S. capitiformicae 1H-SSA4T based on morphological and physiological characteristics. On the basis of the evidence from this polyphasic study, the strain is concluded to represent a novel species of the genus Streptomyces, for which the name Streptomyces tailanensis sp. nov. is proposed. The type strain is TRM68348T (=CCTCC AA 2018086T=KCTC 49274T).
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