| IPR016194 | SPOC-like, C-terminal domain superfamily | Homologous Superfamily |
| IPR027388 | Ku70, bridge and pillars domain superfamily | Homologous Superfamily |
| IPR036361 | SAP domain superfamily | Homologous Superfamily |
| IPR006165 | Ku70 | Family |
| IPR036465 | von Willebrand factor A-like domain superfamily | Homologous Superfamily |
| IPR005161 | Ku70/Ku80, N-terminal alpha/beta | Domain |
| IPR006164 | Ku70/Ku80, DNA-binding domain | Domain |
| IPR047087 | Ku70, core domain | Domain |
| IPR005160 | Ku70/Ku80 C-terminal arm | Domain |
| IPR003034 | SAP domain | Domain |
| B [auth E] | IPR036397 | Ribonuclease H superfamily | Homologous Superfamily |
| B [auth E] | IPR002121 | HRDC domain | Domain |
| B [auth E] | IPR011545 | DEAD/DEAH-box helicase domain | Domain |
| B [auth E] | IPR027417 | P-loop containing nucleoside triphosphate hydrolase | Homologous Superfamily |
| B [auth E] | IPR010997 | HRDC-like superfamily | Homologous Superfamily |
| B [auth E] | IPR001650 | Helicase, C-terminal domain-like | Domain |
| B [auth E] | IPR036388 | Winged helix-like DNA-binding domain superfamily | Homologous Superfamily |
| B [auth E] | IPR014001 | Helicase superfamily 1/2, ATP-binding domain | Domain |
| B [auth E] | IPR036390 | Winged helix DNA-binding domain superfamily | Homologous Superfamily |
| B [auth E] | IPR029491 | Helicase Helix-turn-helix domain | Domain |
| B [auth E] | IPR004589 | DNA helicase, ATP-dependent, RecQ type | Family |
| B [auth E] | IPR032284 | ATP-dependent DNA helicase RecQ, zinc-binding domain | Domain |
| B [auth E] | IPR012337 | Ribonuclease H-like superfamily | Homologous Superfamily |
| B [auth E] | IPR002562 | 3'-5' exonuclease domain | Domain |
| B [auth E] | IPR018982 | RQC domain | Domain |
| B [auth E] | IPR044876 | HRDC domain superfamily | Homologous Superfamily |
| C [auth B] | IPR036494 | Ku, C-terminal domain superfamily | Homologous Superfamily |
| C [auth B] | IPR016194 | SPOC-like, C-terminal domain superfamily | Homologous Superfamily |
| C [auth B] | IPR036465 | von Willebrand factor A-like domain superfamily | Homologous Superfamily |
| C [auth B] | IPR002035 | von Willebrand factor, type A | Domain |
| C [auth B] | IPR005161 | Ku70/Ku80, N-terminal alpha/beta | Domain |
| C [auth B] | IPR014893 | Ku, C-terminal | Domain |
| C [auth B] | IPR006164 | Ku70/Ku80, DNA-binding domain | Domain |
| C [auth B] | IPR005160 | Ku70/Ku80 C-terminal arm | Domain |
| C [auth B] | IPR024193 | Ku80 | Family |