A predicted RNase toxin found in bacterial polymorphic toxin systems. The toxin contains two structural domains, an N-terminal alpha/beta domain and a C-terminal all-beta domain. The domain contains conserved GxR, RxxxoH GxE and GxxH motifs and a conserved histidine residue. In bacterial polymorphic toxin systems, the toxin is usually exported by the Photorhabdus virulence cassette (PVC)-type export system [1].

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