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Int J Syst Evol Microbiol. 2019 Oct 8. doi: 10.1099/ijsem.0.003743. [Epub ahead of print]

Streptomyces bauhiniae sp. nov., isolated from tree bark of Bauhinia variegata Linn. in Thailand.

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Department of Biochemistry and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
Japan Collection of Microorganisms, RIKEN BioResource Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan.
Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand.


A novel actinomycete strain, Bv016T, belonging to the genus Streptomyces, was isolated from the bark of tree, Bauhinia variegata Linn., collected in Thailand. The taxonomic position of the strain was characterized by using a polyphasic approach. ll-Diaminopimelic acid, glucose, mannose, ribose and galactose were detected in its whole-cell hydrolysates. The N-acyl type of muramic acid was acetyl. The strain contained anteiso-C15  :  0, iso-C16  :  0, iso-C15  :  0 and iso-C14  :  0 as the major fatty acids and MK-9(H8), MK-9(H6) and MK-9(H4) as the major menaquinones. The major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannoside. The strain was closely related to Streptomyces griseoluteus JCM 4041T (98.4 %), Streptomyces seoulensis JCM 10116T (98.4 %) and Streptomyces recifensis JCM 4408T (98.2 %). The draft genome of Bv016T was 6.74 Mb with 5949 coding sequences with an average G+C content of 71.7 mol%. The ANIb and ANIm values of strain Bv016T were 94.1 and 95.2 %, respectively, and the digital DNA-DNA hybridization value was 60.6 % in comparison with the draft genome of S. griseoluteus JCM 4765T. The results of the taxonomic analysis suggested that strain Bv016T represented a novel species of the genus Streptomyces for which the name Streptomyces bauhiniae sp. nov. is proposed. The type strain is Bv016T (=JCM 33208T=TISTR 2645T).


Streptomyces bauhiniae; actinomycetes; polyphasic taxonomy; streptomycetaceae; tree bark


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