| B [auth C] | IPR019954 | Ubiquitin conserved site | Conserved Site |
| B [auth C] | IPR038582 | Small ribosomal subunit protein eS31 eukaryotic superfamily | Homologous Superfamily |
| B [auth C] | IPR050158 | Ubiquitin and ubiquitin-like | Family |
| B [auth C] | IPR011332 | Zinc-binding ribosomal protein | Homologous Superfamily |
| B [auth C] | IPR000626 | Ubiquitin-like domain | Domain |
| B [auth C] | IPR002906 | Small ribosomal subunit protein eS31 | Domain |
| B [auth C] | IPR019956 | Ubiquitin domain | Domain |
| B [auth C] | IPR029071 | Ubiquitin-like domain superfamily | Homologous Superfamily |
| C [auth A] | IPR042302 | Ubiquitin-activating enzyme E1, FCCH domain superfamily | Homologous Superfamily |
| C [auth A] | IPR000011 | Ubiquitin/SUMO-activating enzyme E1-like | Family |
| C [auth A] | IPR045886 | ThiF/MoeB/HesA family | Family |
| C [auth A] | IPR042449 | Ubiquitin-activating enzyme E1, inactive adenylation domain, subdomain 1 | Homologous Superfamily |
| C [auth A] | IPR019572 | Ubiquitin-activating enzyme, SCCH domain | Domain |
| C [auth A] | IPR042063 | Ubiquitin-activating enzyme E1, SCCH domain | Homologous Superfamily |
| C [auth A] | IPR000594 | THIF-type NAD/FAD binding fold | Domain |
| C [auth A] | IPR032420 | Ubiquitin-activating enzyme E1, four-helix bundle | Domain |
| C [auth A] | IPR018075 | Ubiquitin-activating enzyme E1 | Family |
| C [auth A] | IPR032418 | Ubiquitin-activating enzyme E1, FCCH domain | Domain |
| C [auth A] | IPR018965 | Ubiquitin-activating enzyme E1, C-terminal | Domain |
| C [auth A] | IPR035985 | Ubiquitin-activating enzyme-like | Homologous Superfamily |
| C [auth A] | IPR038252 | Ubiquitin-activating enzyme E1, C-terminal domain superfamily | Homologous Superfamily |
| A [auth B] | IPR016135 | Ubiquitin-conjugating enzyme/RWD-like | Homologous Superfamily |
| A [auth B] | IPR000608 | Ubiquitin-conjugating (UBC), catalytic core domain | Domain |
| A [auth B] | IPR022103 | Baculoviral IAP repeat-containing protein 6 | Family |
| A [auth B] | IPR001370 | BIR repeat | Repeat |