| Domain | Name | Category | Type |
| IPR008193 | DNA-directed RNA polymerase Rpb11, 13-16kDa subunit, conserved site | Site | Conserved site |
| IPR009025 | DNA-directed RNA polymerase, RBP11-like dimerisation domain | Domain | Domain |
| IPR033898 | DNA-directed RNA polymerases I and III subunit AC19 | Family | Family |
| IPR036603 | RNA polymerase, RBP11-like subunit | Family | Homologous superfamily |