| Domain | Description | Evalue | Bits | GA | Start | End |
| ThiF | ThiF family | 4.9E-32 | 100 | 20.70 | 79 | 453 |
| E1_FCCH | Ubiquitin-activating enzyme E1 FCCH domain | 1.8E-31 | 97 | 29.50 | 252 | 323 |
| E1_4HB | Ubiquitin-activating enzyme E1 four-helix bundle | 5E-27 | 83 | 25.00 | 324 | 393 |
| ThiF | ThiF family | 0 | 243 | 20.70 | 475 | 974 |
| UBA_e1_thiolCys | Ubiquitin-activating enzyme active site | 0 | 274 | 19.90 | 662 | 915 |
| E1_UFD | Ubiquitin fold domain | 6.5E-25 | 76 | 25.00 | 986 | 1075 |