| node1 | node2 | node1 accession | node2 accession | node1 annotation | node2 annotation | score |
| napA | napB | STM2259 | STM2256 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | 0.999 |
| napA | napC | STM2259 | STM2255 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Periplasmic nitrate reductase; Cytochrome c-type biogenesis protein; similar to E. coli cytochrome c-type protein (AAC75262.1); Blastp hit to AAC75262.1 (200 aa), 88% identity in aa 1 - 200. | 0.992 |
| napA | napD | STM2259 | STM2260 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Periplasmic nitrate reductase; Chaperone for NapA, the catalytic subunit of the periplasmic nitrate reductase. It binds directly and specifically to the twin- arginine signal peptide of NapA, preventing premature interaction with the Tat translocase and premature export. | 0.999 |
| napA | napF | STM2259 | STM2261 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Ferredoxin-type protein; Could be involved in the maturation of NapA, the catalytic subunit of the periplasmic nitrate reductase, before its export into the periplasm; Belongs to the NapF family. | 0.993 |
| napA | napG | STM2259 | STM2258 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Ferredoxin-type protein; Electron transfer; similar to E. coli ferredoxin-type protein: electron transfer (AAC75265.1); Blastp hit to AAC75265.1 (231 aa), 94% identity in aa 1 - 231. | 0.998 |
| napA | napH | STM2259 | STM2257 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Ferredoxin-type protein; Electron transfer; similar to E. coli ferredoxin-type protein: electron transfer (AAC75264.1); Blastp hit to AAC75264.1 (287 aa), 88% identity in aa 1 - 280. | 0.998 |
| napA | narG | STM2259 | STM1764 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Similar to E. coli nitrate reductase 1, alpha subunit (AAC74308.1); Blastp hit to AAC74308.1 (1247 aa), 95% identity in aa 1 - 1247; Belongs to the prokaryotic molybdopterin-containing oxidoreductase family. | 0.993 |
| napA | nirB | STM2259 | STM3474 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Similar to E. coli nitrite reductase (NAD(P)H) subunit (AAC76390.1); Blastp hit to AAC76390.1 (847 aa), 95% identity in aa 1 - 847; Belongs to the nitrite and sulfite reductase 4Fe-4S domain family. | 0.986 |
| napA | nirD | STM2259 | STM3475 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Nitrite reductase small subunit; Required for activity of the reductase. | 0.957 |
| napA | nrfA | STM2259 | STM4277 | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | Nitrite reductase periplasmic cytochrome c(552); Catalyzes the reduction of nitrite to ammonia, consuming six electrons in the process; Belongs to the cytochrome c-552 family. | 0.990 |
| napB | napA | STM2256 | STM2259 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Periplasmic large subunit nitrate reductase; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite. | 0.999 |
| napB | napC | STM2256 | STM2255 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Periplasmic nitrate reductase; Cytochrome c-type biogenesis protein; similar to E. coli cytochrome c-type protein (AAC75262.1); Blastp hit to AAC75262.1 (200 aa), 88% identity in aa 1 - 200. | 0.999 |
| napB | napD | STM2256 | STM2260 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Periplasmic nitrate reductase; Chaperone for NapA, the catalytic subunit of the periplasmic nitrate reductase. It binds directly and specifically to the twin- arginine signal peptide of NapA, preventing premature interaction with the Tat translocase and premature export. | 0.994 |
| napB | napF | STM2256 | STM2261 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Ferredoxin-type protein; Could be involved in the maturation of NapA, the catalytic subunit of the periplasmic nitrate reductase, before its export into the periplasm; Belongs to the NapF family. | 0.961 |
| napB | napG | STM2256 | STM2258 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Ferredoxin-type protein; Electron transfer; similar to E. coli ferredoxin-type protein: electron transfer (AAC75265.1); Blastp hit to AAC75265.1 (231 aa), 94% identity in aa 1 - 231. | 0.998 |
| napB | napH | STM2256 | STM2257 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Ferredoxin-type protein; Electron transfer; similar to E. coli ferredoxin-type protein: electron transfer (AAC75264.1); Blastp hit to AAC75264.1 (287 aa), 88% identity in aa 1 - 280. | 0.999 |
| napB | narG | STM2256 | STM1764 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Similar to E. coli nitrate reductase 1, alpha subunit (AAC74308.1); Blastp hit to AAC74308.1 (1247 aa), 95% identity in aa 1 - 1247; Belongs to the prokaryotic molybdopterin-containing oxidoreductase family. | 0.940 |
| napB | nirB | STM2256 | STM3474 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Similar to E. coli nitrite reductase (NAD(P)H) subunit (AAC76390.1); Blastp hit to AAC76390.1 (847 aa), 95% identity in aa 1 - 847; Belongs to the nitrite and sulfite reductase 4Fe-4S domain family. | 0.938 |
| napB | nirD | STM2256 | STM3475 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Nitrite reductase small subunit; Required for activity of the reductase. | 0.938 |
| napB | nrfA | STM2256 | STM4277 | Periplasmic small subunit nitrate reductase of cytochrome C550; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB; Belongs to the NapB family. | Nitrite reductase periplasmic cytochrome c(552); Catalyzes the reduction of nitrite to ammonia, consuming six electrons in the process; Belongs to the cytochrome c-552 family. | 0.948 |