| Domain | Name | Category | Type |
| IPR004519 | DNA-directed RNA polymerase, subunit E/RPC8 | Family | Family |
| IPR005576 | RNA polymerase Rpb7-like , N-terminal | Domain | Domain |
| IPR012340 | Nucleic acid-binding, OB-fold | Family | Homologous superfamily |
| IPR013238 | RNA polymerase III, subunit Rpc25 | Domain | Domain |
| IPR036898 | RNA polymerase Rpb7-like, N-terminal domain superfamily | Family | Homologous superfamily |