Regulatory RNAs, also referred to as sRNAs because of their small sizes, are generally noncoding RNAs (ncRNAs) (Gottesman, 2004). sRNAs have been identified and reported to act major players in bacteria to handle a vast array of stresses, such as oxidative stress, temperature stress, iron deficiency stress, pH stress, and metabolite stress (Repoila and Gottesman, 2001; Opdyke et al., 2004; Jonas and Melefors, 2009; Holmqvist and Wagner, 2017). Hundreds of sRNAs have been predicted to be present
