|
|
Your query returned 1 entry. 
Printable version
| EC | 1.13.11.84 | ||||||
| Accepted name: | crocetin dialdehyde synthase | ||||||
| Reaction: | zeaxanthin + 2 O2 = crocetin dialdehyde + 2 3β-hydroxy-β-cyclocitral (overall reaction) (1a) zeaxanthin + O2 = 3β-hydroxy-8′-apo-β-carotenal + 3β-hydroxy-β-cyclocitral (1b) 3β-hydroxy-8′-apo-β-carotenal + O2 = crocetin dialdehyde + 3β-hydroxy-β-cyclocitral |
||||||
| Glossary: | crocetin dialdehyde = 8,8′-diapocarotene-8,8′-dial zeaxanthin = (3R,3′R)-β,β-carotene-3,3′-diol 3β-hydroxy-β-cyclocitral = (4R)-4-hydroxy-2,6,6-trimethylcyclohex-1-en-1-carboxaldehyde |
||||||
| Other name(s): | CCD2; zeaxanthin 7,8-dioxygenase | ||||||
| Systematic name: | zeaxanthin:oxygen 7′,8′-oxidoreductase (bond-cleaving) | ||||||
| Comments: | The enzyme, characterized from the plant Crocus sativus (saffron), acts twice, cleaving 3β-hydroxy-β-cyclocitral off each 3-hydroxy end group. It is part of the zeaxanthin degradation pathway in that plant, leading to the different compounds that impart the color, flavor and aroma of the saffron spice. The enzyme can similarly cleave the 7-8 double bond of other carotenoids with a 3-hydroxy-β-carotenoid end group. | ||||||
| Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||||||
| References: |
| ||||||