RNA-binding protein. Inactive exonuclease. Homodimer (By similarity). The 3'-5' exonuclease domain lacks the conserved Asp-Glu-Asp-Asp (DEDD) residues that coordinates divalent ions essential for exonuclease activity. No visible phenotype. Flies display normal fertility and do not show any transposon activation in the germline. Belongs to the EXD1 family. It is unclear whether the protein is involved in the piRNA metabolic process. The absence of phenotypes in flies suggests that this function is not conserved.