Fold: Restriction endonuclease-like [52979]
core: 3 layers, a/b/a; mixed beta-sheet of 5 strands, order 12345; strands 2 &, in some families, 5 are antiparallel to the rest
Family: PA4535-like [142449]
contains the PD motif at the beginning of strand 2 and putative catalytic glutamate in strand 3, whereas the putative catalytic lysine is migrated to an alpha-helix