| IPR050180 | RNR Ribonuclease | Family |
| IPR041505 | Dis3-like cold-shock domain 2 | Domain |
| IPR003029 | S1 domain | Domain |
| IPR022966 | Ribonuclease II/R, conserved site | Conserved Site |
| IPR033770 | Exosome complex exonuclease RRP44, S1 domain | Domain |
| IPR033771 | Rrp44-like cold shock domain | Domain |
| IPR002716 | PIN domain | Domain |
| IPR001900 | Ribonuclease II/R | Domain |
| IPR029060 | PIN-like domain superfamily | Homologous Superfamily |
| IPR012340 | Nucleic acid-binding, OB-fold | Homologous Superfamily |
| IPR033100 | Exosome complex component RRP45 | Family |
| IPR027408 | PNPase/RNase PH domain superfamily | Homologous Superfamily |
| IPR001247 | Exoribonuclease, phosphorolytic domain 1 | Domain |
| IPR050590 | Exosome complex component Rrp42 subfamily | Family |
| IPR036345 | Exoribonuclease, PH domain 2 superfamily | Homologous Superfamily |
| IPR020568 | Ribosomal protein uS5 domain 2-type superfamily | Homologous Superfamily |
| IPR015847 | Exoribonuclease, phosphorolytic domain 2 | Domain |
| IPR048565 | RRP4, S1 domain | Domain |
| IPR036612 | K Homology domain, type 1 superfamily | Homologous Superfamily |
| IPR025721 | Exosome complex component, N-terminal domain | Domain |
| IPR012340 | Nucleic acid-binding, OB-fold | Homologous Superfamily |
| IPR026699 | Exosome complex RNA-binding protein 1/RRP40/RRP4 | Family |
| IPR004088 | K Homology domain, type 1 | Domain |
| IPR019495 | Exosome complex component CSL4, C-terminal | Domain |
| IPR039771 | Exosome complex component Csl4 | Family |
| IPR012340 | Nucleic acid-binding, OB-fold | Homologous Superfamily |
| IPR048626 | Exosome complex component CSL4, N-terminal domain | Domain |
| IPR050080 | Ribonuclease PH | Family |
| IPR027408 | PNPase/RNase PH domain superfamily | Homologous Superfamily |
| IPR001247 | Exoribonuclease, phosphorolytic domain 1 | Domain |
| IPR020568 | Ribosomal protein uS5 domain 2-type superfamily | Homologous Superfamily |
| IPR041054 | Exosome complex exonuclease Rrp40, N-terminal domain, eukaryotes | Domain |
| IPR049469 | Exosome complex component RRP40, type I KH domain | Domain |
| IPR037319 | Rrp40, S1 domain | Domain |
| IPR036612 | K Homology domain, type 1 superfamily | Homologous Superfamily |
| IPR012340 | Nucleic acid-binding, OB-fold | Homologous Superfamily |
| IPR026699 | Exosome complex RNA-binding protein 1/RRP40/RRP4 | Family |
| IPR004088 | K Homology domain, type 1 | Domain |
| IPR027408 | PNPase/RNase PH domain superfamily | Homologous Superfamily |
| IPR050590 | Exosome complex component Rrp42 subfamily | Family |
| IPR020568 | Ribosomal protein uS5 domain 2-type superfamily | Homologous Superfamily |
| IPR050080 | Ribonuclease PH | Family |
| IPR027408 | PNPase/RNase PH domain superfamily | Homologous Superfamily |
| IPR020568 | Ribosomal protein uS5 domain 2-type superfamily | Homologous Superfamily |
| IPR015847 | Exoribonuclease, phosphorolytic domain 2 | Domain |
| IPR001247 | Exoribonuclease, phosphorolytic domain 1 | Domain |
| IPR036345 | Exoribonuclease, PH domain 2 superfamily | Homologous Superfamily |
| IPR050080 | Ribonuclease PH | Family |
| IPR027408 | PNPase/RNase PH domain superfamily | Homologous Superfamily |
| IPR001247 | Exoribonuclease, phosphorolytic domain 1 | Domain |
| IPR036345 | Exoribonuclease, PH domain 2 superfamily | Homologous Superfamily |
| IPR020568 | Ribosomal protein uS5 domain 2-type superfamily | Homologous Superfamily |
| IPR015847 | Exoribonuclease, phosphorolytic domain 2 | Domain |
| IPR027408 | PNPase/RNase PH domain superfamily | Homologous Superfamily |
| IPR050590 | Exosome complex component Rrp42 subfamily | Family |
| IPR020568 | Ribosomal protein uS5 domain 2-type superfamily | Homologous Superfamily |
| IPR001247 | Exoribonuclease, phosphorolytic domain 1 | Domain |
| IPR011082 | Exosome-associated factor Rrp47/DNA strand repair C1D | Family |
| IPR007146 | Sas10/Utp3/C1D | Family |
| IPR036397 | Ribonuclease H superfamily | Homologous Superfamily |
| IPR002121 | HRDC domain | Domain |
| IPR012588 | Exosome-associated factor Rrp6, N-terminal | Domain |
| IPR012337 | Ribonuclease H-like superfamily | Homologous Superfamily |
| IPR045092 | Exosome complex exonuclease Rrp6-like | Family |
| IPR002562 | 3'-5' exonuclease domain | Domain |
| IPR049559 | Rrp6-like, 3'-5' exonuclease domain | Domain |
| IPR010997 | HRDC-like superfamily | Homologous Superfamily |
| IPR044876 | HRDC domain superfamily | Homologous Superfamily |