| IPR036494 | Ku, C-terminal domain superfamily | Homologous Superfamily |
| IPR024193 | Ku80 | Family |
| IPR016194 | SPOC-like, C-terminal domain superfamily | Homologous Superfamily |
| IPR006164 | Ku70/Ku80 beta-barrel domain | Domain |
| IPR036465 | von Willebrand factor A-like domain superfamily | Homologous Superfamily |
| IPR005161 | Ku70/Ku80, N-terminal alpha/beta | Domain |
| IPR014893 | Ku, C-terminal | Domain |
| IPR005160 | Ku70/Ku80 C-terminal arm | Domain |
| IPR036397 | Ribonuclease H superfamily | Homologous Superfamily |
| IPR002121 | HRDC domain | Domain |
| IPR011545 | DEAD/DEAH box helicase domain | Domain |
| IPR027417 | P-loop containing nucleoside triphosphate hydrolase | Homologous Superfamily |
| IPR010997 | HRDC-like superfamily | Homologous Superfamily |
| IPR001650 | Helicase, C-terminal domain-like | Domain |
| IPR036388 | Winged helix-like DNA-binding domain superfamily | Homologous Superfamily |
| IPR014001 | Helicase superfamily 1/2, ATP-binding domain | Domain |
| IPR036390 | Winged helix DNA-binding domain superfamily | Homologous Superfamily |
| IPR029491 | Helicase Helix-turn-helix domain | Domain |
| IPR004589 | DNA helicase, ATP-dependent, RecQ type | Family |
| IPR032284 | ATP-dependent DNA helicase RecQ, zinc-binding domain | Domain |
| IPR012337 | Ribonuclease H-like superfamily | Homologous Superfamily |
| IPR002562 | 3'-5' exonuclease domain | Domain |
| IPR018982 | RQC domain | Domain |
| IPR044876 | HRDC domain superfamily | Homologous Superfamily |