EC Number |
Reaction |
Reference |
---|
1.14.19.17 | a dihydroceramide + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4E)-sphing-4-enine ceramide + 2 ferricytochrome b5 + 2 H2O |
- |
- |
1.14.19.17 | a dihydroceramide + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4E)-sphing-4-enine ceramide + 2 ferricytochrome b5 + 2 H2O |
FAD takes electrons from NADH and delivers them to ferrocytochrome b5 with bound Fe3+, which is converted to ferricytochrome b5 with Fe2+. Cytochrome b5-Fe2+ passes the electrons to another enzyme-bound Fe3+ to reduce O2 and form ceramide from dihydroceramide |
744686 |
1.14.19.17 | a dihydroceramide + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4E)-sphing-4-enine ceramide + 2 ferricytochrome b5 + 2 H2O |
the desaturation reaction catalyzed by Des1 is presumably initiated by an enzyme-bound iron-oxo species that abstracts specifically the C-4 pro (R)-hydrogen atom from the substrate. FAD takes electrons from NADH and delivers them to ferrocytochrome b5 with bound Fe3+, which is converted to ferricytochrome b5 with Fe2+. Cytochrome b5-Fe2+ passes the electrons to another enzyme-bound Fe3+ to reduce O2 and form ceramide from dihydroceramide |
744686 |