This pseudogene is the C-terminal fragment of low activity DNA endonuclease RpnD which probably yields 3'-hydroxyl ends (By similarity). The intact protein can be seen in this entry (AC B7NGZ6). Expression of the repaired protein increases the frequency of recA-independent recombination, but also decreases viability probably via DNA damage; in a RecA strain expression has no effect on viability but does induce the SOS repair response (PubMed:26162088, PubMed:26618540). May play a role in horizontal gene transfer (PubMed:26162088, PubMed:26618540, PubMed:28096446). Belongs to the Rpn/YhgA-like nuclease family. Could be the product of a pseudogene. Experiments were performed with a repaired version of the protein (AC B7NGZ6) (PubMed:26162088).