The search for synonyms among streptomycetes by using SDS-PAGE of whole-cell proteins.: Emendation of the species Streptomyces aurantiacus, Streptomyces cacaoi subsp cacaoi, Streptomyces caeruleus and Streptomyces violaceus

A collection of 93 Streptomyces reference strains were investigated using SDS-PAGE of whole-cell proteins. Computer-assisted numerical analysis revealed 24 clusters encompassing strains with very similar protein profiles. Five of them grouped several type strains with visually identical patterns. DNA-DNA hybridizations revealed homology values higher than 70% among these type strains. According to the current species concept, it is proposed that Streptomyces albosporeus subsp. albosporeus LMG 19403(T) is considered as a subjective synonym of Streptomyces aurantiacus LMG 19358(T), that Streptomyces aminophilus LMG 19319(T) is considered as a subjective synonym of Streptomyces cacaoi subsp. cacaoi LMG 19320(T), that Streptomyces niveus LMG 19395 T and Streptomyces spheroides LMG 19392 T are considered as subjective synonyms of Streptomyces; caeruleus LMG 19399(T), and that Streptomyces violatus LMG 19397 T is considered as a subjective synonym of Streptomyces violaceus LMG 19360(T).