| Domain | Name | Category | Type |
| IPR002092 | DNA-directed RNA polymerase, phage-type | Family | Family |
| IPR011990 | Tetratricopeptide-like helical domain superfamily | Family | Homologous superfamily |
| IPR029262 | DNA-directed RNA polymerase, N-terminal | Domain | Domain |
| IPR037159 | DNA-directed RNA polymerase, N-terminal domain superfamily | Family | Homologous superfamily |
| IPR043502 | DNA/RNA polymerase superfamily | Family | Homologous superfamily |