1.C.131.1.1
A secreted lipid binding protein of 1085 aas and 5 - 6 TMSs, VasX.  Essential for killing of Dictyostelium discoideum (Miyata et al. 2011).  It is a pore-forming toxin (Durand et al. 2014). It is a T6SS effector and may have a structure resembling that of Colicin Ia (Russell et al. 2014). VasW (295 aas, possibly with a C-terminal TMS) is an accessory protein for VasX (Miyata et al. 2013). The TsiV2 immunity protein (242 aas and 3 or 4 TMSs) protects against VasX. Its gene is adjacent to the vasX gene, and its promoter is within the vasX gene, clearly suggesting a common functional role to counteract the function of VasX (Miyata et al. 2013).