A member of the nucleic acid/nucleotide deaminase superfamily prototyped by Burkholderia BURPS668_1122 [1]. Members of this family are found as toxins in polymorphic toxin systems in a wide range of bacteria and in the eukaryote Perkinsus. Members of this family typically possess a DxE catalytic motif in Helix-2 of the core fold instead of the more common C[H]xE motif. The Perkinsus versions are predicted to be inactive [1].

1: Evolution of the deaminase fold and multiple origins of eukaryotic editing and mutagenic nucleic acid deaminases from bacterial toxin systems. Iyer LM, Zhang D, Rogozin IB, Aravind L; Nucleic Acids Res. 2011; [Epub ahead of print] PMID:21890906