Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0009055 | molecular_function | electron transfer activity |
| A | 0016491 | molecular_function | oxidoreductase activity |
| A | 0020037 | molecular_function | heme binding |
| A | 0042597 | cellular_component | periplasmic space |
| A | 0046872 | molecular_function | metal ion binding |
| A | 0050418 | molecular_function | hydroxylamine reductase activity |
| A | 0050421 | molecular_function | nitrite reductase (NO-forming) activity |
| B | 0009055 | molecular_function | electron transfer activity |
| B | 0016491 | molecular_function | oxidoreductase activity |
| B | 0020037 | molecular_function | heme binding |
| B | 0042597 | cellular_component | periplasmic space |
| B | 0046872 | molecular_function | metal ion binding |
| B | 0050418 | molecular_function | hydroxylamine reductase activity |
| B | 0050421 | molecular_function | nitrite reductase (NO-forming) activity |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 2 |
| Details | BINDING SITE FOR RESIDUE OH B 603 |
| Chain | Residue |
| B | HIS369 |
| B | DHE602 |
| site_id | AC2 |
| Number of Residues | 17 |
| Details | BINDING SITE FOR RESIDUE HEC A 601 |
| Chain | Residue |
| A | CYS47 |
| A | CYS50 |
| A | HIS51 |
| A | THR59 |
| A | GLY60 |
| A | LYS61 |
| A | ARG71 |
| A | LEU76 |
| A | LEU79 |
| A | THR84 |
| A | LEU86 |
| A | GLY87 |
| A | MET88 |
| A | PRO89 |
| A | TRP91 |
| B | GLU8 |
| A | ARG46 |
| site_id | AC3 |
| Number of Residues | 20 |
| Details | BINDING SITE FOR RESIDUE DHE A 602 |
| Chain | Residue |
| A | ARG156 |
| A | HIS182 |
| A | ILE183 |
| A | ARG185 |
| A | ARG198 |
| A | ARG225 |
| A | SER226 |
| A | TYR245 |
| A | ALA283 |
| A | ALA284 |
| A | ILE285 |
| A | HIS327 |
| A | ARG372 |
| A | PHE425 |
| A | GLN483 |
| A | GLY531 |
| A | PHE533 |
| A | HOH615 |
| A | HOH634 |
| B | TYR10 |
| site_id | AC4 |
| Number of Residues | 15 |
| Details | BINDING SITE FOR RESIDUE HEC B 601 |
| Chain | Residue |
| A | GLU8 |
| B | ARG46 |
| B | CYS47 |
| B | CYS50 |
| B | HIS51 |
| B | GLY60 |
| B | LYS61 |
| B | LEU63 |
| B | ARG71 |
| B | THR84 |
| B | LEU86 |
| B | GLY87 |
| B | MET88 |
| B | PRO89 |
| B | TRP91 |
| site_id | AC5 |
| Number of Residues | 24 |
| Details | BINDING SITE FOR RESIDUE DHE B 602 |
| Chain | Residue |
| A | TYR10 |
| A | ALA13 |
| B | ARG156 |
| B | HIS182 |
| B | ILE183 |
| B | ARG185 |
| B | ARG198 |
| B | ARG225 |
| B | SER226 |
| B | TYR245 |
| B | ALA283 |
| B | ALA284 |
| B | ILE285 |
| B | HIS327 |
| B | ARG372 |
| B | PHE425 |
| B | GLN483 |
| B | TRP498 |
| B | GLY531 |
| B | PHE533 |
| B | OH603 |
| B | HOH606 |
| B | HOH609 |
| B | HOH620 |
| site_id | CSA |
| Number of Residues | 3 |
| Details | CATALYTIC SITE ON SUBUNIT A |
| Chain | Residue |
| A | HIS327 |
| A | HIS369 |
| A | DHE602 |
| site_id | CSB |
| Number of Residues | 3 |
| Details | CATALYTIC SITE ON SUBUNIT B |
| Chain | Residue |
| B | HIS327 |
| B | HIS369 |
| B | DHE602 |
Functional Information from SwissProt/UniProt
| Chain | Residue | Details |
| A | CYS47 | |
| A | CYS50 | |
| B | CYS47 | |
| B | CYS50 | |
| Chain | Residue | Details |
| A | HIS51 | |
| A | MET88 | |
| B | HIS51 | |
| B | MET88 | |
| Chain | Residue | Details |
| A | ARG71 | |
| B | ARG225 | |
| B | SER226 | |
| B | TYR245 | |
| B | ARG372 | |
| B | GLN483 | |
| A | THR84 | |
| A | ARG225 | |
| A | SER226 | |
| A | TYR245 | |
| A | ARG372 | |
| A | GLN483 | |
| B | ARG71 | |
| B | THR84 | |
| Chain | Residue | Details |
| A | HIS182 | |
| B | HIS182 | |
Catalytic Information from CSA
| site_id | CSA1 |
| Number of Residues | 2 |
| Details | Annotated By Reference To The Literature 1nir |
| Chain | Residue | Details |
| A | HIS369 | |
| A | HIS327 | |
| site_id | CSA2 |
| Number of Residues | 2 |
| Details | Annotated By Reference To The Literature 1nir |
| Chain | Residue | Details |
| B | HIS369 | |
| B | HIS327 | |
| site_id | MCSA1 |
| Number of Residues | 6 |
| Details | M-CSA 903 |
| Chain | Residue | Details |
| A | CYS47 | covalently attached |
| A | CYS50 | covalently attached |
| A | HIS51 | metal ligand |
| A | MET88 | metal ligand |
| A | HIS327 | electrostatic stabiliser |
| A | HIS369 | electrostatic stabiliser |
| site_id | MCSA2 |
| Number of Residues | 6 |
| Details | M-CSA 903 |
| Chain | Residue | Details |
| B | CYS47 | covalently attached |
| B | CYS50 | covalently attached |
| B | HIS51 | metal ligand |
| B | MET88 | metal ligand |
| B | HIS327 | electrostatic stabiliser |
| B | HIS369 | electrostatic stabiliser |
