| I [auth F] | IPR020708 | DNA-directed RNA polymerase, 14-18kDa subunit, conserved site | Conserved Site |
| I [auth F] | IPR028363 | DNA-directed RNA polymerase, subunit RPB6 | Family |
| I [auth F] | IPR006110 | RNA polymerase, subunit omega/Rpo6/RPB6 | Family |
| I [auth F] | IPR036161 | RPB6/omega subunit-like superfamily | Homologous Superfamily |
| I [auth F] | IPR006111 | Archaeal Rpo6/eukaryotic RPB6 RNA polymerase subunit | Family |
| H [auth E] | IPR014381 | DNA-directed RNA polymerase subunit Rpo5/Rpb5 | Family |
| H [auth E] | IPR036710 | RNA polymerase Rpb5, N-terminal domain superfamily | Homologous Superfamily |
| H [auth E] | IPR035913 | RPB5-like RNA polymerase subunit superfamily | Homologous Superfamily |
| H [auth E] | IPR000783 | RNA polymerase, subunit H/Rpb5 C-terminal | Domain |
| H [auth E] | IPR020608 | RNA polymerase, subunit H/Rpb5, conserved site | Conserved Site |
| H [auth E] | IPR005571 | RNA polymerase, Rpb5, N-terminal | Domain |
| G [auth D] | IPR005574 | RNA polymerase subunit Rpb4/RPC9 | Family |
| G [auth D] | IPR038846 | DNA-directed RNA polymerase III subunit RPC9 | Family |
| G [auth D] | IPR010997 | HRDC-like superfamily | Homologous Superfamily |
| G [auth D] | IPR006590 | RNA polymerase Rpb4/RPC9, core | Domain |
| G [auth D] | IPR038324 | Rpb4/RPC9 superfamily | Homologous Superfamily |
| F [auth C] | IPR011262 | DNA-directed RNA polymerase, insert domain | Domain |
| F [auth C] | IPR011263 | DNA-directed RNA polymerase, RpoA/D/Rpb3-type | Domain |
| F [auth C] | IPR050518 | Archaeal Rpo3/Eukaryotic RPB3 RNA Polymerase Subunit | Family |
| F [auth C] | IPR022842 | DNA-directed RNA polymerase subunit Rpo3/Rpb3/RPAC1 | Family |
| F [auth C] | IPR033901 | DNA-directed RNA polymerases I and III subunit AC40 | Family |
| F [auth C] | IPR036643 | DNA-directed RNA polymerase, insert domain superfamily | Homologous Superfamily |
| F [auth C] | IPR001514 | DNA-directed RNA polymerase, 30-40kDa subunit, conserved site | Conserved Site |
| F [auth C] | IPR036603 | RNA polymerase, RBP11-like subunit | Homologous Superfamily |
| E [auth B] | IPR007120 | DNA-directed RNA polymerase, subunit 2, hybrid-binding domain | Domain |
| E [auth B] | IPR007121 | RNA polymerase, beta subunit, conserved site | Conserved Site |
| E [auth B] | IPR007646 | RNA polymerase Rpb2, domain 4 | Domain |
| E [auth B] | IPR007647 | RNA polymerase Rpb2, domain 5 | Domain |
| E [auth B] | IPR014724 | RNA polymerase Rpb2, OB-fold | Homologous Superfamily |
| E [auth B] | IPR007642 | RNA polymerase Rpb2, domain 2 | Domain |
| E [auth B] | IPR015712 | DNA-directed RNA polymerase, subunit 2 | Family |
| E [auth B] | IPR037033 | DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamily | Homologous Superfamily |
| E [auth B] | IPR007645 | RNA polymerase Rpb2, domain 3 | Domain |
| E [auth B] | IPR007644 | RNA polymerase, beta subunit, protrusion | Domain |
| E [auth B] | IPR007641 | RNA polymerase Rpb2, domain 7 | Domain |
| D [auth A] | IPR007081 | RNA polymerase Rpb1, domain 5 | Domain |
| D [auth A] | IPR035697 | DNA-directed RNA polymerase III subunit RPC1, N-terminal | Domain |
| D [auth A] | IPR035698 | DNA-directed RNA polymerase III subunit RPC1, C-terminal | Domain |
| D [auth A] | IPR007083 | RNA polymerase Rpb1, domain 4 | Domain |
| D [auth A] | IPR044893 | RNA polymerase Rpb1, clamp domain superfamily | Homologous Superfamily |
| D [auth A] | IPR006592 | RNA polymerase, N-terminal | Domain |
| D [auth A] | IPR007066 | RNA polymerase Rpb1, domain 3 | Domain |
| D [auth A] | IPR042102 | RNA polymerase Rpb1, domain 3 superfamily | Homologous Superfamily |
| D [auth A] | IPR015700 | DNA-directed RNA polymerase III subunit RPC1 | Family |
| D [auth A] | IPR000722 | RNA polymerase, alpha subunit | Domain |
| D [auth A] | IPR038120 | RNA polymerase Rpb1, funnel domain superfamily | Homologous Superfamily |
| D [auth A] | IPR007080 | RNA polymerase Rpb1, domain 1 | Domain |
| C [auth 4] | IPR009057 | Homedomain-like superfamily | Homologous Superfamily |
| C [auth 4] | IPR051575 | Myb-like DNA-binding | Family |
| C [auth 4] | IPR017930 | Myb domain | Domain |
| C [auth 4] | IPR017884 | SANT domain | Domain |
| C [auth 4] | IPR001005 | SANT/Myb domain | Domain |
| IPR009057 | Homedomain-like superfamily | Homologous Superfamily |
| IPR039467 | Transcription factor TFIIIB component B'', Myb domain | Domain |
| IPR001005 | SANT/Myb domain | Domain |
| IPR000812 | Transcription factor TFIIB | Family |
| IPR013137 | Zinc finger, TFIIB-type | Domain |
| IPR054078 | BRF2-like, C-terminal | Domain |
| IPR036915 | Cyclin-like superfamily | Homologous Superfamily |
| IPR030491 | TATA-box binding protein, conserved site | Conserved Site |
| IPR000814 | TATA-box binding protein | Family |
| IPR012295 | TBP domain superfamily | Homologous Superfamily |
| IPR033710 | TATA-box binding protein, eukaryotic | Family |
| T [auth Q] | IPR024661 | DNA-directed RNA polymerase III, subunit Rpc31 | Family |
| B [auth 3] | IPR022042 | snRNA-activating protein complex, subunit 3 | Family |
| S [auth P] | IPR036388 | Winged helix-like DNA-binding domain superfamily | Homologous Superfamily |
| S [auth P] | IPR007832 | RNA polymerase Rpc34 | Family |
| S [auth P] | IPR036390 | Winged helix DNA-binding domain superfamily | Homologous Superfamily |
| S [auth P] | IPR016049 | RNA polymerase Rpc34-like | Family |
| R [auth O] | IPR008806 | RNA polymerase III Rpc82, C -terminal | Domain |
| R [auth O] | IPR036388 | Winged helix-like DNA-binding domain superfamily | Homologous Superfamily |
| R [auth O] | IPR013197 | RNA polymerase III subunit RPC82-related, helix-turn-helix | Domain |
| R [auth O] | IPR039748 | DNA-directed RNA polymerase III subunit RPC3 | Family |
| R [auth O] | IPR055207 | DNA-directed RNA polymerase III subunit RPC3, winged-helix domain | Domain |
| Q [auth N] | IPR007811 | DNA-directed RNA polymerase III subunit RPC4 | Family |
| P [auth M] | IPR006886 | DNA-directed RNA polymerase III subunit Rpc5 | Family |
| P [auth M] | IPR045576 | DNA-directed RNA polymerase III subunit RPC5, C-terminal | Domain |
| O [auth L] | IPR006591 | RNA polymerase archaeal subunit P/eukaryotic subunit RPABC4 | Family |
| O [auth L] | IPR029040 | RNA polymerase subunit RPABC4/transcription elongation factor Spt4 | Homologous Superfamily |
| O [auth L] | IPR039747 | DNA-directed RNA polymerases I, II, and III subunit RPABC4 | Family |
| N [auth K] | IPR022905 | DNA-directed RNA polymerase subunit Rpo11-like | Family |
| N [auth K] | IPR009025 | DNA-directed RNA polymerase, RBP11-like dimerisation domain | Domain |
| N [auth K] | IPR033898 | DNA-directed RNA polymerases I and III subunit AC19 | Family |
| N [auth K] | IPR036603 | RNA polymerase, RBP11-like subunit | Homologous Superfamily |
| N [auth K] | IPR008193 | DNA-directed RNA polymerase Rpb11, 13-16kDa subunit, conserved site | Conserved Site |
| M [auth J] | IPR023580 | RNA polymerase subunit RPB10 | Homologous Superfamily |
| M [auth J] | IPR020789 | RNA polymerases, subunit N, zinc binding site | Binding Site |
| M [auth J] | IPR000268 | DNA-directed RNA polymerase subunit RPABC5/Rpb10 | Family |
| L [auth I] | IPR001529 | DNA-directed RNA polymerase II subunit RPB9-like, zinc ribbon | Domain |
| L [auth I] | IPR012164 | DNA-directed RNA polymerase subunit/transcription factor S | Family |
| L [auth I] | IPR001222 | Zinc finger, TFIIS-type | Domain |
| L [auth I] | IPR019761 | DNA-directed RNA polymerase M, 15kDa subunit, conserved site | Conserved Site |
| L [auth I] | IPR034014 | Pol III subunit C11, C-terminal zinc ribbon | Domain |
| K [auth H] | IPR012340 | Nucleic acid-binding, OB-fold | Homologous Superfamily |
| K [auth H] | IPR005570 | DNA-directed RNA polymerases I, II, and III subunit RPABC3 | Family |
| J [auth G] | IPR045113 | RNA polymerase subunit Rpb7-like | Family |
| J [auth G] | IPR005576 | RNA polymerase Rpb7-like , N-terminal | Domain |
| J [auth G] | IPR013238 | RNA polymerase III, subunit Rpc25 | Domain |
| J [auth G] | IPR036898 | RNA polymerase Rpb7-like, N-terminal domain superfamily | Homologous Superfamily |
| J [auth G] | IPR004519 | DNA-directed RNA polymerase, subunit E/RPC8 | Family |
| J [auth G] | IPR012340 | Nucleic acid-binding, OB-fold | Homologous Superfamily |
| A [auth 1] | IPR019188 | snRNA-activating protein complex subunit 1 | Family |