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Int J Syst Evol Microbiol 59 (2009), 1302-1309; DOI  10.1099/ijs.0.006171-0
© 2009 International Union of Microbiological Societies

Streptomyces polyantibioticus sp. nov., isolated from the banks of a river

Marilize le Roes-Hill{dagger} and Paul R. Meyers

Department of Molecular and Cell Biology, University of Cape Town, Private Bag 1, Rondebosch 7701, Cape Town, South Africa

Correspondence
Paul R. Meyers
paul.meyers{at}uct.ac.za

As part of an antibiotic-screening programme, an actinomycete, designated strain SPRT, was isolated from soil collected from the banks of the Umgeni River, KwaZulu-Natal Province, South Africa. The isolate produced branching vegetative mycelia with sporangiophores bearing sporangia developing at a late stage of growth. The sporangia contained smooth, almond-shaped, non-motile spores. Strain SPRT exhibited antibiosis against various Gram-positive and Gram-negative bacteria, including Enterococcus faecium VanA (a vancomycin-resistant strain), Mycobacterium aurum A+ and Escherichia coli ATCC 25922. The chemotaxonomic characteristics of the strain, with the exception of the phospholipid pattern, corresponded with those of the members of the family Streptomycetaceae Waksman and Henrici 1943. Furthermore, phylogenetic analysis based on 16S rRNA genes showed that the strain was closely related to members of the genus Streptomyces, which supports its classification in the family Streptomycetaceae. Thus strain SPRT represents a novel species of the genus Streptomyces, for which the name Streptomyces polyantibioticus sp. nov. is proposed. The type strain is SPRT (=DSM 44925T=NRRL B-24448T).

{dagger}Present address: Biocatalysis and Technical Biology Research Group, Cape Peninsula University of Technology, Bellville Campus, PO Box 1906, Bellville 7535, Cape Town, South Africa.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain SPRT is DQ141528.

A Southern blot showing the rRNA operon copy number of strain SPRT is available as a supplementary figure with the online version of this paper.






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