Ubiquinone dehydrogenase
Ubiquinone dehydrogenase is a large enzyme complex within the inner mitochondrial membrane. It is an intermediate in the electron transfer chain.
It consists of:
- cytochrome b:
- has haem prosthetic group
- accepts electrons from ubiquinone to produce an Fe 2+ redox state
- transfers electron to ubiquinol to recycle Fe 3+ state
- ubiquinol: transfers electron to ferrous carrier by oxidation
- ferrous carrier: transfers electron to cytochrome c1 by oxidation
- cytochrome c1:
- contains haem prosthetic group
- reduced by transfer of electrons from ferrous carrier
- reoxidized by transfer of electrons to cytochrome c
The passage of 1 electron through the ubiquinone dehydrogenase complex acts to pump 1 proton into the mitochondrial intermembranous space. Ultimately, this produces 1 molecule of ATP through oxidative phosphorylation.
Related pages
Create an account to add page annotations
Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.