Pheophorbide a oxygenase
Definition:
EC Tree > 1 Oxidoreductases > 1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen > 1.14.15 With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen into the other donor > 1.14.15.17 pheophorbide a oxygenase
Pheophorbide a oxygenase is a Rieske-type iron-sulfur enzyme catalyzing the key ring-opening step of chlorophyll breakdown during leaf senescence and fruit ripening; it uses reduced ferredoxin (from photosystem I or the pentose-phosphate pathway), opens the chlorin ring to the red chlorophyll catabolite, which is immediately reduced by RCC reductase to the primary fluorescent catabolite. Pheophorbide b inhibits; 18O2 labeling shows only the aldehyde oxygen derives from O2.
Pheophorbide a oxygenase is a Rieske-type iron-sulfur enzyme catalyzing the key ring-opening step of chlorophyll breakdown during leaf senescence and fruit ripening; it uses reduced ferredoxin (from photosystem I or the pentose-phosphate pathway), opens the chlorin ring to the red chlorophyll catabolite, which is immediately reduced by RCC reductase to the primary fluorescent catabolite. Pheophorbide b inhibits; 18O2 labeling shows only the aldehyde oxygen derives from O2.
Biomedical Dictionary
The Biomedical Dictionary is a comprehensive and professional collection of biological academic terms and subject datas. All explanations are supported by authoritative books or high impact factor literatures, and you can acquire accurate explanations of the biomedical terms you want to know.
Molarity Calculator
Dilution Calculator
