What is the Difference Between Oxidases and Oxygenases?
🆚 Go to Comparative Table 🆚Oxidases and oxygenases are two types of enzymes that function as biocatalysts, facilitating oxidation-reduction reactions. They have some differences in their mechanisms and substrate interactions:
- Oxidases:
- Catalyze the transfer of two electrons from a donor to oxygen, producing hydrogen peroxide.
- Usually contain a flavin co-enzyme or metal in the active site to form LTQ and TPQ as a co-factor.
- Examples include ascorbic acid oxidase, monoamine oxidase, and cytochrome oxidase.
- Oxygenases:
- Catalyze the incorporation of oxygen into a substrate.
- Include dioxygenases that incorporate both oxygen atoms into a substrate and monooxygenases that incorporate a single oxygen atom as a hydroxyl group into the substrate.
- Examples include carotenase, tryptophan pyrrolase, tyrosinase, and phenylalanine hydroxylase.
In summary, oxidases transfer hydrogen from a substrate to oxygen, resulting in the formation of water or hydrogen peroxide, while oxygenases directly incorporate oxygen into a substrate.
Comparative Table: Oxidases vs Oxygenases
Here is a table highlighting the differences between oxidases and oxygenases:
| Feature | Oxidases | Oxygenases |
|---|---|---|
| Definition | Oxidases are enzymes that catalyze the transfer of hydrogen from a substrate to oxygen in oxidation reactions, resulting in the formation of water or hydrogen peroxide. | Oxygenases are enzymes that catalyze the transfer of atomic oxygen from molecular oxygen (O2) to a substrate. |
| Function | Oxidases are responsible for building ATP that acts as the cell's energy storehouse. | Oxygenases facilitate the breaking down of iron that is distributed to various parts of the body. |
| Types | Examples of oxidases include ascorbic acid oxidase, monoamine oxidase, and cytochrome oxidase. | Examples of oxygenases include carotenase, tryptophan pyrrolase, tyrosinase, and phenylalanine hydroxylase. |
| Reactions | Oxidases catalyze the transfer of hydrogen from a substrate to an oxygen, producing water or hydrogen peroxide. | Oxygenases catalyze the direct incorporation of the oxygen from the molecular O2 to a substrate. There are two types of oxygenases: mono-oxygenases, which incorporate one oxygen atom as a hydroxyl group to a substrate, and dioxygenases, which incorporate two atoms of oxygen to a substrate. |
In summary, oxidases and oxygenases are both types of enzymes that function as biocatalysts, but they have distinct differences in their functions and reactions. Oxidases transfer hydrogen from a substrate to oxygen, while oxygenases transfer atomic oxygen from molecular oxygen to a substrate.
- Oxygenation vs Oxidation
- Reductase vs Oxidoreductase
- Catalase vs Peroxidase
- Oxide vs Dioxide
- Oxygen vs Ozone
- Epoxidation vs Oxidation
- Peroxide vs Hydrogen Peroxide
- Oxidation Reaction vs Reduction Reaction
- Hydroxyl vs Hydroxide
- Hydrogen vs Oxygen
- Oxidative vs Reductive Ozonolysis
- Oxidation vs Combustion
- Oxidation vs Reduction
- Corrosion vs Oxidation
- Oxidation vs Fermentation
- Atomic Oxygen vs Molecular Oxygen
- Oxygen vs Air
- Positive vs Negative Oxidase Test
- Oxygen vs Carbon Dioxide