| P22515 | n/a | 6nya | EDO | A | 1121 | e6nyaA3 | Rossmann-like | Rossmann-related | Activating enzymes of the ubiquitin-like proteins | ThiF |
| P22515 | n/a | 6nya | EDO | C | 201 | e6nyaA4 | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | UBA_E1_SCCH |
| P22515 | n/a | 6nya | EDO | D | 1218 | e6nyaD5 | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | Catalytic cysteine domain in ubiquitin-activating enzyme | E1_4HB |