Interaction of CodY, a novel Bacillus subtilis DNA-binding protein, with the dpp promoter region.
The product of the codY gene is required for nutritional repression of the Bacillus subtillis dipeptide permease operon (dpp), an operon expressed at early stationary phase in nutrient-rich medium. Though unrelated to any known DNA-binding protein, CodY was shown to bind specifically to the dpp promoter region. DNase I footprinting experiments revealed that the CodY-protected region encompasses the dpp transcription start site and overlaps with the region protected by another regulatory protein, AbrB. CodY and AbrB were found to compete, in vitro, for binding to the dpp promoter region. Binding of CodY was altered in mutants defective in nutritional regulation.
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Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
Sonenshein
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D001412:Bacillus subtilis; D001426:Bacterial Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D001483:Base Sequence; D018983:DNA Footprinting; D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D019476:Insect Proteins / Q000378:metabolism*; D008969:Molecular Sequence Data; D016296:Mutagenesis; D011401:Promoter Regions, Genetic; D012097:Repressor Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*
D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D019476:Insect Proteins; D012097:Repressor Proteins; C064196:dpp protein, Drosophila