Table 1.

Summary of Riboregulators in Shigella.

Riboregulator	Type	Environmental influence	Target	Virulence associated process
CsrB/CsrC	Sequestering sRNAs	Carbon	CsrA	Invasion
RnaG	cis-encoded sRNA	Temperature	icsA	Spread
RyhB	trans-encoded sRNA	Iron	VirB	Invasion
5′ UTR ShuA	RNA thermometer	Iron and temperature	ShuA	Iron acquisition from heme

Each riboregulator described in Shigella has also contributed to virulence of Shigella in some way. The sRNAs seem to effect invasion and spread while the RNA thermometer is important with iron acquisition.