Oxidases vs Oxygenases
Oxidases and Oxygenases are the enzymes that are present in all the living organisms. Enzymes are proteins that are responsible to increase the rate of reactions in cells of the organisms. In a chemical reaction a complex molecule is broken down to a simple one using enzyme as a catalyst. The activation energy of the chemical reaction is lowered by the enzyme so that a chemical reaction can take place at high speed. Oxidases are the enzymes that are also called oxiredutases because they reduce oxygen to water or hydrogen peroxide by making molecular oxygen to accept electron. Oxygenases are the enzymes that transfer oxygen from the air to the substrate (molecule that is to be processed) so that it gets oxidizes.
Oxidases are generally found in many parts of a human body and are work as the catalyst in oxidizing many types of substrate so that the complex molecules like amines, glucose and xanthenes are oxidized to simpler molecules that are easily metabolized by the body. There are different types of Oxidases and are named according to the molecule they catalyze. It can be seen by following reaction
AH + O2 + 2H+ + 2e- = AOH + H2O
Oxygenases are oxidizers that are catalyze the reaction in which substrate is oxidized. There are two types of Oxygenases namely Monooxygenases and dioxygenases. Monooxygenases are the enzymes that transfer only one oxygen atom from air to the substrate and dioxygenases are the ones that transfer both the oxygen atoms to the substrate during the oxidation reaction. This can be seen through this reaction
XH2 + O2 = XO + H2O
• Oxidases are generally found in cell membranes and are responsible for building of ATP that store cell energy and Oxygenases are responsible for breaking down iron that is distributed to the whole body.
• Oxidases transfer electrons to the molecular oxygen but oxygenase transfers atomic oxygen to the substrate.