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Verrucosispora sediminis sp. nov., a novel cyclodipeptide-producing actinomycete from the South China Sea

¹ Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100190, PR China;
² Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan, 650091, PR China

³ E-mail: wjli{at}ynu.edu.cn

An actinomycete, designated strain MS426T, whose broth showed potent antimicrobial activity, was isolated from a deep sea sediment sample of the South China Sea. An almost complete sequence of the 16S rRNA gene of strain MS426T was determined following direct sequencing of the amplified gene. The sequence was aligned with those of representatives of the family Micromonosporaceae available in the public databases, and phylogenetic trees were inferred by using three algorithms. The organism branched adjacent to Verrucosispora lutea YIM 013T, forming a distinct cluster within the evolutionary radiation occupied by the genus Verrucosispora. Strain MS426T was also readily distinguished from both of the validly described species classified in this taxon by using a combination of chemical and morphological markers, and by using DNA-DNA relatedness data. On the basis of these genotypic and phenotypic differences, the name Verrucosispora sediminis sp. nov. is proposed for a new antimicrobial strain with pharmaceutical potential. The type strain is MS426T (= CGMCC 4.3550T = JCM 15670T).