| Domain | Name | Category | Type |
| IPR002110 | Ankyrin repeat | Repeat | Repeat |
| IPR020683 | Ankyrin repeat-containing domain | Domain | Domain |
| IPR031628 | BCL-6 corepressor, non-ankyrin-repeat domain | Domain | Domain |
| IPR032365 | BCL-6 corepressor, PCGF1 binding domain | Domain | Domain |
| IPR036770 | Ankyrin repeat-containing domain superfamily | Family | Homologous superfamily |
| IPR038227 | PCGF Ub-like fold discriminator superfamily | Family | Homologous superfamily |