cytochrome oxidase for its activity contains options a.Mg b.Fe c.Co d.Mn
Answers
Cytochrome oxidase contains Fe+3 for its activity.
Cytochrome c oxidase or complex IV is a large multi-subunit transmembrane associated enzyme. This protein complex found on transmembrane of mitochondria in bacteria, archaea and eukaryotes. This enzyme participates in the final step in the respiratory electron transport chain where it accepts an electron from cytochrome c proteins and transfer it to one oxygen molecule which results in formation of water.
The protein complex contains 13 protein subunits. It also contains three copper ions, two heme groups, a cytochrome a, and cytochrome a3 and two copper centers CuA and CuB.
Cytochrome oxidase complex is present in three conformational states:
• Fully oxidized- active state
• Partially oxidized
• Fully reduced- inactive state
4 Fe2+-cytochrome c + 8 H+in + O2 → 4 Fe3+-cytochrome c + 2 H2O + 4 H+out
Answer:
Cytochrome oxidase requires Fe or iron for its activity.
Cytochrome oxidase can be found in the mitochondrial membrane.
It is an oxidizing enzyme that contains porphyrin and iron.
It acts as a catalyst to convert electrons to oxygen in the electron transfer chain, a process that finally results in the formation of ATP.
Lack of cytochrome oxidase can lead to nutritional deficiencies.