This domain family is found in eukaryotes, and is typically between 78 and 110 amino acids in length. The family is found in association with Pfam:PF05485. There are two completely conserved residues (D and G) that may be functionally important. This family is an 87kDa transposase protein which catalyses both the precise and imprecise excision of a nonautonomous P transposable element.

1: Identification and immunochemical analysis of biologically active Drosophila P element transposase. Rio DC, Laski FA, Rubin GM; Cell. 1986;44:21-32. PMID:2416475