Nucleic Acids Research, 1991, Vol. 19, No. 10 2623-2627
© 1991
MOLECULAR BIOLOGY |
Transcription of genes involved in the earliest steps of actinorhodin biosynthesis in Streptomyces coelicolor
Centro Nacional de Biotecnologia Serrano 115 bis, 28006 Madrid, Spain 1John Innes Institute Colney Lane, Norwich NR4 7UH, UK
* To whom correspondence should be addressed
Received February 28, 1991. Revised April 23, 1991. Accepted April 23, 1991.
A 170bp long BamHI-Sau3A DNA fragment from the actIII-actI intergenic region of the actinorhodin (Act) biosynthetlc gene cluster of Streptomyces coelicolor A3(2) contains two promoters directing transcription In a divergent manner. One of them, the acflll promoter, is responsable for the transcription of the acflll gene and the other controls transcription of the adjacent actIII region in the opposite direction. Weak activity of the actIII promoter can be detected in Streptomyces lividans and Bacilius subtilis in the absence but not in the presence of glucose. Neither promoter seems to function in Escherichia coli.
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