CHAPTER 20: Unit 3. Enzyme – Catalyzed Reactions

At the beginning of the reaction, the substrate S (the reactant) align itself with the enzyme E and a complex is formed from the combination of the substrate and the enzyme ES. The reaction then occurs inside the active center of the enzyme. The reaction goes through a maxim when a transition state is formed ES± and the product is formed which resides at the active center. A complex is formed from the combination of the product P and the enzyme EP. At the end of the reaction the enzyme releases the product out of its active site and at the end of reaction, the enzyme is recovered as well as the product.

Reference: https://upload.wikimedia.org/wikipedia/commons/c/c0/Enzyme_catalysis_energy_levels_2.svg

Reference: https://upload.wikimedia.org/wikipedia/commons/1/1f/Enzyme_action.png

The videos below illustrate the enzyme catalyzed reactions:

There are three ways by which the enzyme can catalyze the reaction:

1. Intermolecular reaction
2. Intramolecular reaction
3. Enzyme – catalyzed reactions

Reference: https://wou.edu/chemistry/courses/online-chemistry-textbooks/ch450-and-ch451-biochemistry-defining-life-at-the-molecular-level/chapter-6-enzymes/