| Q9HW26 | DB14546 | 1yir | SO4 | A | 2002 | e1yirA2 | TIM beta/alpha-barrel | Nicotinate/Quinolinate PRTase C-terminal domain-like | Nicotinate/Quinolinate PRTase C-terminal domain-like | NAPRTase |
| Q9HW26 | DB14546 | 1yir | SO4 | B | 3002 | e1yirB2 | TIM beta/alpha-barrel | Nicotinate/Quinolinate PRTase C-terminal domain-like | Nicotinate/Quinolinate PRTase C-terminal domain-like | NAPRTase |
| Q9HW26 | DB14546 | 1yir | SO4 | C | 4003 | e1yirC1 | alpha/beta-Hammerhead/Barrel-sandwich hybrid | alpha/beta-Hammerhead/Barrel-sandwich hybrid | Nicotinate/Quinolinate PRTase N-terminal domain-like | NAPRTase_N |
| Q9HW26 | DB14546 | 1yir | SO4 | C | 4003 | e1yirC2 | TIM beta/alpha-barrel | Nicotinate/Quinolinate PRTase C-terminal domain-like | Nicotinate/Quinolinate PRTase C-terminal domain-like | NAPRTase |
| Q9HW26 | DB14546 | 1yir | SO4 | D | 5002 | e1yirD2 | TIM beta/alpha-barrel | Nicotinate/Quinolinate PRTase C-terminal domain-like | Nicotinate/Quinolinate PRTase C-terminal domain-like | NAPRTase |