| Motif id | From | To | Definition | E value | Score |
| pf:NIR_SIR_ferr | 59 | 120 | Nitrite/Sulfite reductase ferredoxin-like half domain
| 2.4e-18 | - |
| pf:NIR_SIR | 129 | 284 | Nitrite and sulphite reductase 4Fe-4S domain
| 2.4e-47 | - |
| pf:NIR_SIR_ferr | 306 | 365 | Nitrite/Sulfite reductase ferredoxin-like half domain
| 9.4e-18 | - |
| pf:NIR_SIR | 384 | 527 | Nitrite and sulphite reductase 4Fe-4S domain
| 9.8e-07 | - |