Abstract:The trp operon of Chlamydia trachomatis has a genetic organization that is distinct from other model bacteria. The operon contains the trpR open-reading frame (ORF), an intergenic region (IGR), and the trpB and trpA ORFs. TrpR mediates tryptophan-dependent regulation of the operon from the major promoter upstream of trpR (PtrpR). We recently reported that trpBA is additionally regulated by the iron-dependent repressor YtgR via an operator sequence within the IGR upstream of an alternative promoter for TrpR-ind… Show more
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