1.3.5.3: protoporphyrinogen IX dehydrogenase (quinone)
This is an abbreviated version!
For detailed information about protoporphyrinogen IX dehydrogenase (quinone), go to the full flat file.
Reaction
Synonyms
HemG, HemG protein, PPO, PPOX, PPX, PPX1, protogen oxidase, protoporphyrinogen IX dehydrogenase (menaquinone), protoporphyrinogen IX oxidase
ECTree
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General Information
General Information on EC 1.3.5.3 - protoporphyrinogen IX dehydrogenase (quinone)
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physiological function
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the FMN enzyme protoporphyrinogen IX oxidase (HemG) of Escherichia coli abstracts six electrons from its substrate and transfers them via ubiquinone, cytochrome bo3 and cytochrome bd oxidase to oxygen. Under anaerobic conditions electrons are transferred via menaquinone, fumarate and nitrate reductase. Cytochrome bo3 , cytochrome bd, and nitrate reductase contribute to the proton motive force that drives ATP formation
additional information
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detailed model of heme biosynthesis coupled energy generation, overview