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Abstract

A novel actinobacterial strain, designated Z1027, was isolated from a soil sample collected near the Tuotuo River, Qinghai–Tibet Plateau (China). The strain exhibited antibacterial activity against and . The taxonomic position of strain Z1027 was determined using a polyphasic approach. The organism had chemotaxonomic and morphological properties consistent with its classification in the genus and formed a distinct phyletic line in the 16S rRNA gene tree, together with ATCC 700248 (99.19 % similarity), JL-6 (98.84 %) and CFBP 4531 (98.36 %). The genomic DNA G+C content of strain Z1027 was 74±1 mol%. The DNA–DNA relatedness values between strain Z1027 and ATCC 700248 and CFBP 4531 were 38.5±0.4 and 26.2±1.2 %, respectively, both of them significantly lower than 70 %. Chemotaxonomic data revealed that strain Z1027 possessed MK-9(H) and MK-9(H) as the major menaquinones, -diaminopimelic acid as the diagnostic diamino acid and galactose as a whole-cell sugar. Diphosphatidylglycerol, phosphatidylethanolamine, phosphatydilinositol and seven other unknown polar lipids were detected; iso-C, summed feature 3 (C 7 and/or C 6) and C were the major fatty acids. On the basis of these genotypic and phenotypic data, it is proposed that isolate Z1027 (=CGMCC 4.7272=JCM 31054) should be classified as the type strain of a novel species of the genus sp. nov.

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2016-12-01
2020-01-21
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