σE Regulates and Is Regulated by a Small RNA in Escherichia coli

By K. Thompson, V. Rhodius, S. Gottesman. 2007

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Systematic deletion of Salmonella small RNA genes identifies CyaR, a conserved CRP‐dependent riboregulator of OmpX synthesis (2008, background): “…sE also halts the synthesis of new OMPs by activating the transcription of MicA and RybB, two Hfq-dependent sRNAs that repress the mRNAs of all major and many minor OMPs (Figueroa-Bossi et al., 2006; Johansen et al., 2006; Papenfort et al., 2006; Thompson et al., 2007; Udekwu and Wagner, 2007).”
Regulatory RNAs in Bacteria (2009, background): “In E. coli, for example, ryhB is repressed when iron is released after RyhB downregulates ironsulfur enzymes (Massé et al., 2005), and micA and rybB are repressed when membrane stress is relieved upon their downregulation of outer membrane porins (Johansen et al., 2006; Thompson et al., 2007).”
Bacterial small RNA regulators: versatile roles and rapidly evolving variations. (2011, background): “…transcribed by sE, a sigma factor that regulates genes involved in both the trafficking of outer membrane proteins through the periplasm and quality control when the periplasm accumulates unfolded proteins (Johansen et al. 2006; Papenfort et al. 2006; Thompson et al. 2007; Udekwu and Wagner 2007).”