What are the five main functions of proteins?

Protein is the only nutrient that can build, repair, and maintain body tissues. An adequate supply of proteins in the daily diet is essential. All tissues and fluids in the body, with the exception of bile and urine, contain some protein.

Definition of protein

Protein is a material that comprises amino acids, carbohydrates, and carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur, and is included in many diets. The type of nutrient found in meats is one example of a protein.

Functions of protein

Listed below are few functions of proteins

  • Proteins help in regenerating and creating DNA molecules and carry out complex processes.
  • Digestion is carried out by the digestive enzymes which are essentially proteinaceous in nature.
  • Proteins are associated with the creation of various types of hormones that help in balancing the components of the body.
  • Cells interact with other cells and the external environment via receptors existing on the surface of cells. These receptors are built of proteins.
  • The antibody is a type of protein that is majorly used by the immune system to repair and heal the body from foreign bacteria.
  • These proteins function as chemical messengers, which help in the interaction between the cells, tissues, and organs.
  • Dead cells need to be replaced and damaged cells need to be repaired. As proteins form the basis for every body cell, it is evident that the greatest need for protein is during growth stages such as infancy, childhood, adolescence, and pregnancy.

Proteins are made of amino acids, small units necessary for growth and tissue repair. Proteins are important in the development of skin, teeth, and bones. In addition, they build and repair damaged tissue and are important in enzyme and hormone production.

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