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 | 15 |
| Details | BINDING SITE FOR RESIDUE HEM A 601 |
| Chain | Residue |
| A | GLY78 |
| A | LYS79 |
| A | LEU81 |
| A | TYR93 |
| A | PHE97 |
| A | SER102 |
| A | ALA104 |
| A | GLY105 |
| A | MET106 |
| A | TRP109 |
| A | ARG64 |
| A | CYS65 |
| A | CYS68 |
| A | HIS69 |
| A | THR77 |
| site_id | AC2 |
| Number of Residues | 22 |
| Details | BINDING SITE FOR RESIDUE DHE A 602 |
| Chain | Residue |
| A | ARG174 |
| A | HIS200 |
| A | ILE201 |
| A | ARG203 |
| A | ARG216 |
| A | ARG243 |
| A | SER244 |
| A | TYR263 |
| A | ALA302 |
| A | ILE303 |
| A | HIS345 |
| A | ARG391 |
| A | PHE444 |
| A | GLN507 |
| A | THR554 |
| A | PHE557 |
| A | SO2603 |
| A | HOH613 |
| A | HOH622 |
| A | HOH641 |
| A | HOH644 |
| A | HOH734 |
| site_id | AC3 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE SO2 A 603 |
| Chain | Residue |
| A | HIS345 |
| A | HIS388 |
| A | PHE444 |
| A | DHE602 |
| site_id | AC4 |
| Number of Residues | 13 |
| Details | BINDING SITE FOR RESIDUE HEM B 601 |
| Chain | Residue |
| B | ARG64 |
| B | CYS65 |
| B | CYS68 |
| B | HIS69 |
| B | GLY78 |
| B | LYS79 |
| B | TYR93 |
| B | SER102 |
| B | ALA104 |
| B | MET106 |
| B | PRO107 |
| B | TRP109 |
| B | HOH880 |
| site_id | AC5 |
| Number of Residues | 28 |
| Details | BINDING SITE FOR RESIDUE DHE B 602 |
| Chain | Residue |
| B | PRO27 |
| B | SER28 |
| B | ARG174 |
| B | HIS200 |
| B | ILE201 |
| B | ARG203 |
| B | ARG216 |
| B | ARG243 |
| B | SER244 |
| B | TYR263 |
| B | ALA302 |
| B | ILE303 |
| B | HIS345 |
| B | ARG391 |
| B | PHE444 |
| B | GLN507 |
| B | THR554 |
| B | GLY555 |
| B | PHE557 |
| B | SO2603 |
| B | HOH604 |
| B | HOH623 |
| B | HOH633 |
| B | HOH636 |
| B | HOH637 |
| B | HOH715 |
| B | HOH746 |
| B | HOH850 |
| site_id | AC6 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE SO2 B 603 |
| Chain | Residue |
| B | HIS345 |
| B | HIS388 |
| B | PHE444 |
| B | DHE602 |
| site_id | C1A |
| Number of Residues | 1 |
| Details | THE C HEM IS THE POINT OF ELECTRON ENTRY. |
| site_id | C1B |
| Number of Residues | 1 |
| Details | THE C HEM IS THE POINT OF ELECTRON ENTRY. |
| site_id | D1A |
| Number of Residues | 1 |
| Details | THE D HEM IS THE SITE OF CATALYTIC ACTIVITY. |
| site_id | D1B |
| Number of Residues | 1 |
| Details | THE D HEM IS THE SITE OF CATALYTIC ACTIVITY. |
Functional Information from SwissProt/UniProt
| Chain | Residue | Details |
| A | HIS17 | |
| A | TYR25 | |
| A | HIS69 | |
| A | HIS200 | |
| B | HIS17 | |
| B | TYR25 | |
| B | HIS69 | |
| B | HIS200 | |
| Chain | Residue | Details |
| A | SER28 | |
| A | ARG391 | |
| A | GLN507 | |
| A | THR554 | |
| B | SER28 | |
| B | LYS79 | |
| B | TYR93 | |
| B | TRP109 | |
| B | ARG174 | |
| B | ARG203 | |
| B | ARG216 | |
| A | LYS79 | |
| B | ARG243 | |
| B | TYR263 | |
| B | ARG391 | |
| B | GLN507 | |
| B | THR554 | |
| A | TYR93 | |
| A | TRP109 | |
| A | ARG174 | |
| A | ARG203 | |
| A | ARG216 | |
| A | ARG243 | |
| A | TYR263 | |
| Chain | Residue | Details |
| A | CYS65 | |
| A | CYS68 | |
| B | CYS65 | |
| B | CYS68 | |
Catalytic Information from CSA
| site_id | CSA1 |
| Number of Residues | 2 |
| Details | Annotated By Reference To The Literature 1nir |
| Chain | Residue | Details |
| A | HIS388 | |
| A | HIS345 | |
| site_id | CSA2 |
| Number of Residues | 2 |
| Details | Annotated By Reference To The Literature 1nir |
| Chain | Residue | Details |
| B | HIS388 | |
| B | HIS345 | |
