Streptomyces indicus sp. nov., an actinomycete isolated from deep-sea sediment

The taxonomic position of an actinomycete isolated from deep-sea sediment from the Indian Ocean was determined by using a polyphasic approach. The presence of iso-C15 : 0, anteiso-C15 : 0, iso-C16 : 0, iso-C17 : 0 and anteiso-C17 : 0 as the major cellular fatty acids, LL-diaminopimelic acid as the characteristic diamino acid, and MK-9(H4, H6 and H8) as the major menaquinones supported the affiliation of strain IH32-1T to the genus STREPTOMYCES: Comparison of 16S rRNA gene sequences showed that strain IH32-1T exhibited highest similarities to the type strains of Streptomyces globosus (97.6 %) and Streptomyces toxytricini (97.6 %). However, DNA–DNA relatedness values between strain IH32-1T and the type strains of S. globosus and S. toxytricini were determined as 55.2±4.7 and 38.3±2.5 %, respectively. Based on its chemotaxonomic, phenotypic and genotypic characteristics, strain IH32-1T is considered to represent a novel species in the genus Streptomyces, for which the name Streptomyces indicus sp. nov. is proposed. The type strain is IH32-1T ( = DSM 42001T = CGMCC 4.5727T).