Abstract
Three Gram-positive, NaCl-requiring actinobacteria were isolated from a marine sponge, Haliclona sp., collected from the coast of Tateyama City, Japan. Comparison of 16S rRNA gene sequences indicated that these strains represent novel members of the genus Streptomyces, exhibiting low 16S rRNA gene sequence similarities of 98.3-97.4 % with recognized members of the genus. The cell hydrolysates contained the LL-isomer of diaminopimelic acid and the predominant quinones were MK-9 (H(6) and/or H(8)). The DNA G+C contents were in the range 72-75mol%. A polyphasic study of the strains and comparison of the characters with related species of the genus show that these strains represent three novel species of the genus Streptomyces. Therefore, the names Streptomyces tateyamensis sp. nov., Streptomyces haliclonae sp. nov. and Streptomyces marinus sp. nov. are proposed for strains Sp080513SC-30(T) (=NBRC 105048(T) =DSM 41969(T)), Sp080513SC-31(T) (=NBRC 105049(T) =DSM 41970(T)) and Sp080513GE-26(T) (=NBRC 105047(T) =DSM 41968(T)), respectively.
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