CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.40 | 3-Layer(aba) Sandwich |
|
3.40.50 | Rossmann fold |
|
3.40.50.720 | NAD(P)-binding Rossmann-like Domain |
Domain Context
CATH Clusters
| Superfamily | NAD(P)-binding Rossmann-like Domain |
| Functional Family | quinone oxidoreductase |
Enzyme Information
| 1.6.5.5 |
NADPH:quinone reductase.
based on mapping to UniProt Q08257
NADPH + 2 quinone = NADP(+) + 2 semiquinone.
-!- Specific for NADPH. -!- Catalyzes the one-electron reduction of certain quinones, with the orthoquinones 1,2-naphthoquinone and 9,10-phenanthrenequinone being the best substrates. -!- Dicoumarol (cf. EC 1.6.5.2) and nitrofurantoin are competitive inhibitors with respect to the quinone substrate. -!- The semiquinone free-radical product may be non-enzymically reduced to the hydroquinone or oxidized back to quinone in the presence of O(2). -!- Abundant in the lens of the eye of some mammalian species.
|
UniProtKB Entries (1)
| Q08257 |
QOR_HUMAN
Homo sapiens
Quinone oxidoreductase
|
PDB Structure
| PDB | 1YB5 |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | Escherichia |
| Primary Citation |
Crystal Structure of human Zeta-Crystallin at 1.85A
To be Published
|