| Q9UBT2 | n/a | 1y8q | MG | B | 641 | e1y8qB1 | Rossmann-like | Rossmann-related | Activating enzymes of the ubiquitin-like proteins | ThiF |
| Q9UBT2 | n/a | 1y8q | MG | B | 641 | e1y8qB2 | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | n/a |
| Q9UBT2 | n/a | 1y8q | MG | D | 641 | e1y8qD1 | Rossmann-like | Rossmann-related | Activating enzymes of the ubiquitin-like proteins | ThiF |
| Q9UBT2 | n/a | 1y8q | MG | D | 641 | e1y8qD2 | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | n/a |
| Q9UBT2 | n/a | 1y8r | MG | B | 641 | e1y8rB1 | Rossmann-like | Rossmann-related | Activating enzymes of the ubiquitin-like proteins | ThiF |
| Q9UBT2 | n/a | 1y8r | MG | E | 641 | e1y8rE2 | Rossmann-like | Rossmann-related | Activating enzymes of the ubiquitin-like proteins | ThiF |
| Q9UBT2 | n/a | 1y8r | MG | E | 641 | e1y8rE3 | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | n/a |
| Q9UBT2 | n/a | 6cwy | MG | D | 702 | e6cwyD2 | Rossmann-like | Rossmann-related | Activating enzymes of the ubiquitin-like proteins | ThiF |
| Q9UBT2 | n/a | 6cwy | MG | D | 702 | e6cwyD3 | beta-Grasp | E2-binding domain of E1 | E2-binding domain of E1 | UAE_UbL |