Table 3.

Transcriptional regulators of type III secretion systems

OrganismAraC-like protein(s)Two-component response regulatorsAlternative sigma factorsHistone-like proteinsOther factors
Yersiniaspp.VirF/LcrF (87, 89, 130,497)YmoA (91)
P. aeruginosa ExsA (136)
Shigella spp.MxiE (12), VirF (388)CpxR (326), OmpR (42)H-NS (210)VirB (68, 438,461, 495)
S. typhimurium SPI-1InvF (232)HilA (27), SirA (226), PhoP (38, 310)
S. typhimurium SPI-2SpiR (333, 410)
EPECPerA/BfpT (161, 439)
E. amylovora HrpS (138)HrpL (471)
P. syringae pv. syringaeHrpR, HrpS (166, 167, 487)HrpL (487)
R. solanacearum HrpB (155)
X. campestris HrpXv (476)HrpG (478)