Critical nucleotides in the interaction of CatR with the pheBA promoter: conservtion of the CatR-mediated regulation mechanisms between the pheBA and catBCA operons

Results show the activation binding site of CatR contains two G nucleotides important for promoter activity but not for CatR binding as indicated by the site-directed mutagenesis. Data also demonstrate a catR-mediated regulation mechanism conservation between the pheBA and the catBCA promoters.