Abstract
A novel actinobacterium, designated strain K1PN6T, was isolated from soil sample collected in Kantulee peat swamp forest, Surat Thani province, Thailand. The morphological, chemotaxonomic, and phylogenetic characteristics were consistent with its classification in the genus Streptomyces. Based on 16S rRNA gene sequence analysis, strain K1PN6T showed highest similarity to Streptomyces phyllanthi PA1-07T (98.6 %), Streptomyces spongiae Sp080513SC-24T (98.3%) and Streptomyces adustus WH-9T (98.3%). The G + C content of the genomic DNA was 70.3 mol%. Digital DNA–DNA hybridization and average nucleotide identity values between the genome sequence of strain K1PN6T with S. phyllanthi TISTR 2346T (33.7 and 89.1%), S. spongiae NBRC 106415T (38.6 and 90.6%) and S. adustus NBRC 109810T (26.0 and 86.2%) were below the thresholds of 70 and 95–96% for prokaryotic conspecific assignation. Chemotaxonomic data revealed that strain K1PN6T possessed MK-9(H8) (45%) and MK-9(H6) (34%) as the predominant menaquinones. It contained ll-diaminopimelic acid as the diagnostic diamino acid and galactose, glucose, mannose, and ribose as whole-cell sugars. The polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol, phosphatidylinositol mannoside, two unidentified aminolipids, an unidentified phospholipid, and glycophospholipid. The predominant cellular fatty acids (>10%) were iso-C16:0, C16:0, anteiso-C15:0, and iso-C14:0. On the basis of these genotypic and phenotypic data, strain K1PN6T should be designated as a representative of a novel species of the genus Streptomyces, for which the name Streptomyces acidicola sp. nov. is proposed with the type strain K1PN6T (=TBRC 11341T=NBRC 114304T).
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Acknowledgements
This work was supported by Center of Excellence on Biodiversity (BDC), Office of Higher Education Commission (Project Code BDC-PG1-160003) and a research grant No.T-2.2 (Prog.)13.62 from Kasetsart University Research and Development Institute (KURDI). The authors are grateful to the government agency in Kantulee, Surat Thani province, Thailand for sample collection.
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Lipun, K., Chantavorakit, T., Mingma, R. et al. Streptomyces acidicola sp. nov., isolated from a peat swamp forest in Thailand. J Antibiot 73, 435–440 (2020). https://doi.org/10.1038/s41429-020-0294-5
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DOI: https://doi.org/10.1038/s41429-020-0294-5