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  • Title: Streptomyces siamensis sp. nov., and Streptomyces similanensis sp. nov., isolated from Thai soils.
    Author: Sripreechasak P, Matsumoto A, Suwanborirux K, Inahashi Y, Shiomi K, Tanasupawat S, Takahashi Y.
    Journal: J Antibiot (Tokyo); 2013 Nov; 66(11):633-40. PubMed ID: 23756683.
    Abstract:
    Three actinomycete strains, KC-038(T), KC-031 and KC-106(T), were isolated from soil samples collected in the southern Thailand. The morphological and chemotaxonomic properties of strains KC-038(T), KC-031 and KC-106(T) were consistent with the characteristics of members of the genus Streptomyces, that is, the formation of aerial mycelia bearing spiral spore chains; the presence of LL-diaminopimelic acid in the cell wall, MK-9 (H6), MK-9 (H4) and MK-9 (H8) as the predominant menaquinones; and C16:0, iso-C16:0 and anteiso-C15:0 as the major cellular fatty acids. 16S rRNA gene sequence analyses indicated that strains KC-038(T) and KC-031 were highly similar (99.9%), and they were closely related to S. olivochromogenes NBRC 3178(T) (98.1%) and S. psammoticus NBRC 13971(T) (98.1%). Strain KC-106(T) was closely related to S. seoulensis NBRC 16668(T) (98.9%), S. recifensis NBRC 12813(T) (98.9%), S. chartreusis NBRC 12753(T) (98.7%) and S. griseoluteus NBRC 13375(T) (98.4%). The values of DNA-DNA relatedness between the isolates and the type strains of the related species were below 70%. On the basis of the polyphasic evidence, the isolates should be classified as two novel species, namely Streptomyces siamensis sp. nov. (type strain, KC-038(T) = NBRC 108799(T) = PCU 328(T) = TISTR 2107(T)) and Streptomyces similanensis sp. nov. (type strain, KC-106(T) = NBRC 108798(T) = PCU 329(T) = TISTR 2104(T)).
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