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Interaction of Cody, a novel Bacillus subtillis DNA‐binding protein, with the dpp promoter region
Author(s) -
Serror† Pascale,
Sonenshein Abraham L.
Publication year - 1996
Publication title -
molecular microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.857
H-Index - 247
eISSN - 1365-2958
pISSN - 0950-382X
DOI - 10.1111/j.1365-2958.1996.tb02522.x
Subject(s) - operon , biology , bacillus subtilis , dna footprinting , footprinting , psychological repression , transcription (linguistics) , promoter , dna , repressor , dna binding protein , binding site , gene , mutant , genetics , transcription factor , microbiology and biotechnology , gene expression , bacteria , linguistics , philosophy
Summary The product of the codY gene is required for nutritional repression of the Bacillus subtilis 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.