Enzyme is a biocatalyst, and the catalyst only reduces the activation energy required for the reaction, so no extra energy is needed, while the physiological function of shuATP is to supply energy, so ATP is not needed for enzyme catalysis.

Different from the harsh conditions such as high temperature, high pressure, strong acid and strong alkali required by ordinary catalysts, the enzymatic reaction can be carried out at mild room temperature and normal pressure. In addition, the catalytic efficiency of some special enzymes reaches the maximum under certain conditions, such as pepsin in the acidic condition of gastric juice.

Extended data:

ATP can be formed when ADP combines with phosphate group and obtains 8 kcal energy. For animals, people, fungi and most bacteria, it comes from the energy released by the decomposition of organic matter when cells breathe. For green plants, in addition to the energy released by respiration, the conversion of ADP into ATP in chloroplasts also depends on the light energy during photosynthesis.

When ATP is hydrolyzed, ADP is formed and phosphate is released, and energy is also released. These energies will be used in cells, and the movement generated by muscle contraction, the activity of nerve cells and all other activities of living beings use the energy generated by ATP hydrolysis.