| Domain | Name | Category | Type |
| IPR000228 | RNA 3'-terminal phosphate cyclase | Family | Family |
| IPR013791 | RNA 3'-terminal phosphate cyclase, insert domain | Domain | Domain |
| IPR013792 | RNA 3'-terminal phosphate cyclase/enolpyruvate transferase, alpha/beta | Family | Homologous superfamily |
| IPR017770 | RNA 3'-terminal phosphate cyclase type 1 | Family | Family |
| IPR020719 | RNA 3'-terminal phosphate cyclase-like, conserved site | Site | Conserved site |
| IPR023797 | RNA 3'-terminal phosphate cyclase domain | Domain | Domain |
| IPR036553 | RNA 3'-terminal phosphate cyclase, insert domain superfamily | Family | Homologous superfamily |
| IPR037136 | RNA 3'-terminal phosphate cyclase domain superfamily | Family | Homologous superfamily |