FIGURE 1.

The leader region of ompD mRNA and the secondary structures of sRNAs RybB, SdsR, and MicC. (A) The sequence of the ompD-187 mRNA. The RybB, SdsR, and MicC sRNA binding sites are underlined. (ARN)₂ motifs are marked with red font, and the AU-rich region with blue font. (B) Secondary structures of sRNAs RybB (Bouvier et al. 2008), MicC (Pfeiffer et al. 2009), and SdsR (Supplemental Fig. S1), with pairing to complementary ompD mRNA sequences shown on the structures of RybB and MicC, and above the structure of SdsR. The pairing region of SdsR is marked on its structure with bold font. The location of complementary regions within the ompD coding sequence is shown in brackets. The mutations used to confirm the sRNA–mRNA interactions (Supplemental Fig. S2) are shown at the structures of complementary regions.