A predicted RNase toxin found in bacterial polymorphic toxin systems. The toxin possesses an alpha+beta fold with two conserved histidine residues. In bacterial polymorphic toxin systems, the toxin is usually exported by the type 2 or TcdB/TcaC-type secretion system [1]. An example of this, the Pseudomonas RhsT-C, has been experimentally characterised.

1: Polymorphic toxin systems: comprehensive characterization of trafficking modes, processing, mechanisms of action, immunity and ecology using comparative genomics. Zhang D, de Souza RF, Anantharaman V, Iyer LM, Aravind L; Biol Direct. 2012;7:18. PMID:22731697