| Domain | Name | Category | Type |
| IPR000555 | JAB1/MPN/MOV34 metalloenzyme domain | Domain | Domain |
| IPR012337 | Ribonuclease H-like superfamily | Family | Homologous superfamily |
| IPR012591 | PRO8NT domain | Domain | Domain |
| IPR012592 | PROCN domain | Domain | Domain |
| IPR012984 | PROCT domain | Domain | Domain |
| IPR019580 | Pre-mRNA-processing-splicing factor 8, U6-snRNA-binding | Domain | Domain |
| IPR019581 | Pre-mRNA-processing-splicing factor 8, U5-snRNA-binding | Domain | Domain |
| IPR019582 | RNA recognition motif, spliceosomal PrP8 | Domain | Domain |
| IPR021983 | PRP8 domain IV core | Domain | Domain |
| IPR027652 | Pre-mRNA-processing-splicing factor 8 | Family | Family |
| IPR037518 | MPN domain | Domain | Domain |
| IPR042516 | Pre-mRNA-processing-splicing factor 8, U5-snRNA-binding domain superfamily | Family | Homologous superfamily |
| IPR043172 | Prp8 RNase domain IV, palm region | Family | Homologous superfamily |
| IPR043173 | Prp8 RNase domain IV, fingers region | Family | Homologous superfamily |