MtvR regulates the mRNA levels of the <i>E. coli</i> and <i>P. aeruginosa hfq</i> genes.

<p>(A) Levels the <i>hfq_Ec</i> mRNA and the MtvR transcript in cells of the <i>E. coli</i> WT or the <i>E. coli</i> Δ<i>hfq</i> mutant, expressing (+pMtvR) or not the sRNA. (B) Stability of the <i>hfq</i>_Ec mRNA (left panel) in cells expressing (+pMtvR) or not MtvR, and of the MtvR transcript (right panel) in cells of the WT or Δ<i>hfq</i> mutant, expressing MtvR (+pMtvR). (C) Levels of the <i>hfq_Pa</i> mRNA and the MtvR transcript in cells of the <i>P. aeruginosa</i> WT or WT with the <i>hfq</i> gene silenced (<i>hfq</i>^sil), expressing (+pMtvR) or not MtvR. (D) Analysis of the stability of the <i>P. aeruginosa hfq_Pa</i> mRNA and of the MtvR transcript, in cells of the <i>P. aeruginosa</i> strains WT or the WT with the <i>hfq</i> gene silenced (<i>hfq^sil</i>), expressing (+pMtvR) or not MtvR. The levels of the 5S rRNA were used as loading control.