“…Their genes (Argaman et al, 2001;Wassarman et al, 2001;Vogel et al, 2003) are transcriptionally activated by the OmpR-EnvZ two-component system, e.g., under high osmolarity conditions (Guillier & Gottesman, 2006;Brosse et al, 2016). OmrA, but not OmrB, is additionally under the control of the stress sigma factor r s (rpoS; Lévi-Meyrueis et al, 2014;Peano et al, 2015;Colgan et al, 2016). Both sRNAs associate with Hfq in vitro (Holmqvist et al, 2010) and in vivo (Wassarman et al, 2001;Zhang et al, 2003;Chao et al, 2012;Tree et al, 2014;Holmqvist et al, 2016); the sRNAs are destabilized in Δhfq cells (Holmqvist et al, 2010).…”