| Domain | Name | Category | Type |
| IPR000276 | G protein-coupled receptor, rhodopsin-like | Family | Family |
| IPR000596 | Cholecystokinin receptor type A | Family | Family |
| IPR009126 | Cholecystokinin receptor | Family | Family |
| IPR015276 | Cholecystokinin A receptor, N-terminal | Domain | Domain |
| IPR017452 | GPCR, rhodopsin-like, 7TM | Domain | Domain |
| IPR036472 | Cholecystokinin A receptor, N-terminal domain superfamily | Family | Homologous superfamily |