Members of this family of prokaryotic restriction endonucleases recognise the double-stranded sequence CYCGRG (where Y = T/C, and R = A/G) and cleave after C-1. They catalyse the endonucleolytic cleavage of DNA to give specific double-stranded fragments with terminal 5'-phosphates [1].

1: Restriction enzyme BsoBI-DNA complex: a tunnel for recognition of degenerate DNA sequences and potential histidine catalysis. van der Woerd MJ, Pelletier JJ, Xu S, Friedman AM; Structure. 2001;9:133-144. PMID:11250198

2: Sequence, structure and functional diversity of PD-(D/E)XK phosphodiesterase superfamily. Steczkiewicz K, Muszewska A, Knizewski L, Rychlewski L, Ginalski K; Nucleic Acids Res. 2012;40:7016-7045. PMID:22638584