This domain is about 350 amino acid residues long and appears to have a P-loop motif, suggesting this is an ATPase. This domain is often N-terminal to a GCN5-related N-acetyltransferase domain <db_xref db="INTERPRO" dbkey="IPR000182"/> and C-terminal to <db_xref db="INTERPRO" dbkey="IPR013562"/>. Domain of unknown function DUF699, exodeoxyribonuclease V alpha chain