| Domain | Name | Category | Type |
| IPR001375 | Peptidase S9, prolyl oligopeptidase, catalytic domain | Domain | Domain |
| IPR002471 | Peptidase S9, serine active site | Site | Active site |
| IPR011042 | Six-bladed beta-propeller, TolB-like | Family | Homologous superfamily |
| IPR029058 | Alpha/Beta hydrolase fold | Family | Homologous superfamily |