CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
1 | Mainly Alpha |
|
1.10 | Orthogonal Bundle |
|
1.10.760 | Cytochrome Bc1 Complex; Chain D, domain 2 |
|
1.10.760.10 | Cytochrome c-like domain |
Domain Context
CATH Clusters
| Superfamily | Cytochrome c-like domain |
| Functional Family | Nitrite reductase |
Enzyme Information
| 1.7.99.1 |
Hydroxylamine reductase.
based on mapping to UniProt P72181
NH(3) + H(2)O + acceptor = hydroxylamine + reduced acceptor.
-!- Reduced pyocyanine, methylene blue and flavins act as donors for the reduction of hydroxylamine. -!- May be identical to EC 1.7.2.1.
|
| 1.7.2.1 |
Nitrite reductase (NO-forming).
based on mapping to UniProt P72181
Nitric oxide + H(2)O + ferricytochrome c = nitrite + ferrocytochrome c + 2 H(+).
-!- The reaction is catalyzed by two types of enzymes, found in the perimplasm of denitrifying bacteria. -!- One type comprises proteins containing multiple copper centers, the other a heme protein, cytochrome cd1. -!- Acceptors include c-type cytochromes such as cytochrome c-550 or cytochrome c-551 from Paracoccus denitrificans or Pseudomonas aeruginosa, and small blue copper proteins such as azurin and pseudoazurin. -!- Cytochrome cd1 also has oxidase and hydroxylamine reductase activities. -!- May also catalyze the reaction of EC 1.7.99.1 since this is a well- known activity of cytochrome cd1. -!- Formerly EC 1.6.6.5, EC 1.7.99.3 and EC 1.9.3.2.
|
UniProtKB Entries (1)
| P72181 |
NIRS_PARPN
Paracoccus pantotrophus
Nitrite reductase
|
PDB Structure
| PDB | 1QKS |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | |
| Primary Citation |
The anatomy of a bifunctional enzyme: structural basis for reduction of oxygen to water and synthesis of nitric oxide by cytochrome cd1.
Cell(Cambridge,Mass.)
|
