Streptomyces bathyalis sp. nov., an actinobacterium isolated from the sponge in a deep sea

Abstract

A novel actinobacterium, designated ASO4wet^T, was isolated from the unidentified sponge (SO4) in the deep sea collected of the North Atlantic Ocean. Study of 16S rRNA gene sequences indicated that strain ASO4wet^T is a member of the genus Streptomyces and showed the closest similarities to Streptomyces karpasiensis K413^T (98.87 %), Streptomyces glycovorans YIM M 10366^T (98.38 %), and Streptomyces abyssalis YIM M 10400^T (97.53 %). Strain ASO4wet^T contained MK-9(H8) as the predominant menaquinone and the major fatty acids are iso-C_16:0, anteiso-C_15:0, and iso-C_15:0. Polyphasic taxonomy was carried out between strain ASO4wet^T and its phylogenetically closely related Streptomyces strains, which further elucidated their relatedness and revealed that strain ASO4wet^T could be distinguished from currently known Streptomyces species. Strain ASO4wet^T clearly represents a novel species in genus Streptomyces. We propose the name Streptomyces bathyalis sp. nov., with the type strain ASO4wet^T (= DSM 106605^T = NCCB 100657^T). Analysis of the whole-genome sequence of S. bathyalis revealed that genome size is 7,377,472 bp with 6332 coding sequences.