Table 3.

Characteristics of T3S-associated LTs from animal- and plant-pathogenic bacteria

LT	Organism	Characteristics or contribution to T3S and/or virulence	Reference(s)
IpgF	S. flexneri	No effect on virulence; LT activity demonstrated	9, 625
IagB	S. enterica	No effect on virulence; LT activity demonstrated	529, 625
l0045	Enterohemorrhagic E. coli (EHEC)	Contributes to T3S and expression of the filament protein EspA; weakly expressed; localizes mainly to the periplasm	624
EtgA	EPEC	Contributes to T3S and bacterial hemolytic activity; localizes to the periplasm; N-terminally processed; degrades peptidoglycan	192
rOrf3	Citrobacter rodentium	Contributes to virulence and T3S	138
HpaH	X. campestris pv. vesicatoria	Contributes to virulence and T3S; specifically promotes secretion and translocation of selected effector proteins	75
	Xanthomonas axonopodis pv. glycines	Contributes to virulence and HR induction; weakly expressed	272
Hpa2	X. oryzae pv. oryzae	(No) influence on virulence (contradictory data are published); lyses the bacterial cell wall	628, 639
	X. oryzae pv. oryzicola	Contributes to virulence and translocation of effector proteins; interacts with the translocon protein HrpF; secreted by the T3S system	319
HrpH	P. syringae	Contributes to effector protein translocation; overexpression in E. coli leads to an arrest of bacterial growth; suppresses basal plant defense responses; secreted and translocated by the T3S system	412
HopP1	P. syringae	Might contribute to effector protein translocation; suppresses basal plant defense responses; secreted and translocated by the T3S system	412
HopAJ1	P. syringae	Might contribute to effector protein translocation	412