The function of PGBD5 (piggyBac transposable element derived 5, ENSG00000177614) is as follows. Transposase that mediates sequence-specific genomic rearrangements (PubMed:26406119, PubMed:28504702). Can induce genomic rearrangements that inactivate the HPRT1 gene (PubMed:27491780). {ECO:0000269|PubMed:26406119, ECO:0000269|PubMed:27491780, ECO:0000269|PubMed:28504702}.