A predicted RNase toxin found in bacterial polymorphic toxin systems that is proposed to adopt the BECR (Barnase-EndoU-ColicinE5/D-RelE) fold, and contains two conserved histidine, a serine, two lysine, and a threonine residue and a HxVP motif. In bacterial polymorphic toxin systems, the toxin is usually exported by the type 2, type 6, type 7, and MuF-type secretion systems [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