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Int J Syst Evol Microbiol 58 (2008), 2783-2787; DOI  10.1099/ijs.0.65628-0
© 2008 International Union of Microbiological Societies

Taxonomic study of a chromomycin-producing strain and reclassification of Streptomyces cavourensis subsp. washingtonensis as a later synonym of Streptomyces griseus

Xuechang Wu, Yanping Wen, Chaodong Qian, Ou Li, Haihuang Fang and Weifeng Chen

Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou 310012, PR China

Correspondence
Xuechang Wu
shengwukexu{at}163.com

A chromomycin-producing actinomycete, strain AP19, was isolated from a sample of faeces collected from Foping national nature reserve in China. Chemotaxonomic and morphological properties indicated that the novel isolate was a member of the genus Streptomyces. Phylogenetic analyses based on an almost complete 16S rRNA gene sequence of the strain and on the 120-nt nucleotide variable {gamma}-region of this molecule revealed that it was closely related to Streptomyces griseus ISP 5236T and Streptomyces cavourensis subsp. washingtonensis ATCC 27732T. DNA–DNA relatedness values among these strains were above 70 %. Streptomyces cavourensis subsp. washingtonensis could be readily distinguished from Streptomyces cavourensis ATCC 14889T by differing BOX-PCR fingerprinting patterns, relatively low 16S rRNA gene sequence similarity and a low DNA–DNA relatedness value. It is proposed, therefore, that Streptomyces cavourensis subsp. washingtonensis is a later synonym of Streptomyces griseus.

Abbreviations: DAP, diaminopimelic acid

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain AP19 is EF466100.

A figure showing the BOX-PCR patterns of strain AP19 and other closely related strains is available with the online version of this paper.






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