Figure 1

Schematic representation of the rgg ₀₁₈₂ and rgg ₁₃₅₈ loci (A) and of the corresponding proteins (B). Although the rgg ₀₁₈₂ and rgg ₁₃₅₈ loci present analogies (A), they encoded distinct proteins (B). Numbers in panel A indicate the position of nucleotides, with the +1 position being that of the first nucleotide of the rgg ₀₁₈₂ gene. The "deletion fragment" corresponds to the deleted portion of the rgg ₀₁₈₂ gene in the Δrgg ₀₁₈₂ mutant. The broken arrows indicate the promoters. Pshp ₀₁₈₂ and Ppep ₀₁₈₂ materialized the position of the 126 bp and 165 bp PCR fragment respectively used in EMSA. In panel B, amino acids sequence identities are indicated in percent. HTH indicated the Helix-Turn-Helix-XRE motif.