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. 2015 Apr 29;11(4):e1005153. doi: 10.1371/journal.pgen.1005153

Fig 5. Validation of the predicted EcpR1 binding sites in the gcrA and dnaA mRNAs.

Fig 5

Morphological phenotype (A) and DNA content (B) of Rm4011ecpR1 overexpressing ecpR1-2 carrying 2 nt exchanges in the predicted interaction region. The bar represents 2 μm. (C, D) Predicted duplexes between EcpR1 and either gcrA or dnaA mRNAs. Numbers denote positions relative to the AUG start codon of the mRNA and the second 5’-end of EcpR1. The predicted energy score (E) is indicated in kcal/mol. The nucleotide exchanges in the mRNAs of gcrA (gcrA-BS-egfp) and dnaA (pdnaA-BSs-egfp) as well as in EcpR1 (EcpR1-2) are indicated in bold. (E, F) Fluorescence measurements of 4011ecpR1 co-transformed with ecpR1, ecpR1-2, or control SmelC812 overexpression plasmids and the indicated reporter plasmids. Reporter constructs carried either native mRNA sequences derived from gcrA or dnaA or variants with mutations in predicted EcpR1 binding sites (BS). Fragments are delineated in Fig 4. Reporter construct activities were determined as in Fig 4.