Biology

Difference between globular proteins and fibrous proteins

Main difference

The type of proteins that are largely spherical and are spherical in nature and easily soluble in water, unlike the other types found in globular proteins. The type of proteins found only in animals and have a rod-like shape that can resemble a spherical structure of wire wound into a building known as fibrous proteins.

Globular proteins vs. fibrous proteins

Proteins are the essential biological compounds that the human body requires in large quantities, due to their enormous molecular mass, they are considered macromolecules for the different functions and synthesis actions in the human body. These proteins comprise one or more polypeptide chains, although the basic structural unit of the protein is an amino acid. For the formation of biological proteins, amino acids are combined through peptide bonds. The word protein is taken from the Greek word “proteos”, which means “first.” The name shows their requirement in the body for various functions.They are present in the protoplasm of the cell and are responsible for various functions, including the transport of material such as oxygen, minerals, metals, etc. and mechanical movement in the human body. On the basis of 3D dimensional structures, solubility, they are classified into globular and fibrous proteins. Both proteins are equally essential for the body. The protein that has a rod-shaped, thread-like or leaf-shaped structure with the quality of being insoluble in water is called fibrous proteins, while the protein that has an irregular amino acid sequence and that has the quality of becoming soluble in water is called a globular protein.

The type of proteins that are largely spherical and have a spherical nature and easily soluble in water, unlike the other types they become globular proteins. The class of proteins found uniquely in animals and have a rod-like shape that can resemble a spherical wire-wound structure in a building known as fibrous proteins. The totally different title used for this type of proteins covers spheroproteins, since they are spherical in type and mainly the most abundant together with fibrous, membrane and disordered proteins. Another title used for these types encompasses scleroproteins and is used largely as a storage protein that becomes useful whenever there is a shortage of said vitamin throughout the body.

Fibrous proteins should not have the property of dissolving in water and therefore remain insoluble. On the other hand, globular proteins are insoluble in water and even in acids and bases. The impulse of attraction that exists between the fibrous protein molecules remains much stronger. On the other hand, the attractive power that exists between globular proteins has weak hydrogen bonds. The main type of fibrous proteins is made up of silk, wool, and pores and pores and skin. On the other hand, the earliest styles of globular proteins comprise egg, milk, and others.

Comparative chart

Base Globular proteins Fibrous proteins
Solubility Globular proteins are soluble in water, acids, and bases. Fibrous proteins remain insoluble in water, acids, and bases.
Shape and dimension Globular proteins have spherical, ball-shaped shapes, which are three-dimensional (3D) in nature. Fibrous proteins have a rod-like, thread-like, or sheet-like structure.
Intermolecular forces Weak Strong
Function Globular proteins perform various functions, including the transport of oxygen in the blood, the metabolism of glucose, the storage of oxygen in the muscles, and they act as catalysts for hundreds of reactions that take place within the body. Fibrous proteins perform dozens of functions; from providing tensile strength, stiffness, elasticity, to providing structural functions such as the formation of scaffold structures within cells and membrane structures.
Example Examples of globular proteins are myoglobin, insulin, transferrin, and hemoglobin. Examples of fibrous proteins are collagen, desmin, elastin, and F-actin.
What are globular proteins?

Globular proteins are water-soluble proteins that have an irregular amino acid sequence and have spherical, ball-shaped shapes. These shapes are three-dimensional (3D) in nature as polypeptide chains fold in such a way that they form. Because they are soluble in water, they can be transported to the target area by dissolving in blood and other body fluids. Besides being soluble in water, they also have the quality of becoming soluble in acids and bases. Compared to fibrous proteins, they are more complex structures, as they are formed with polypeptide chains that fold into the final ball-shaped shape. One of the reasons why they dissolve in water and other components is their weak intermolecular force. They perform various functions in the human body, including the transport of oxygen in the blood, glucose metabolism, oxygen storage in the muscles and acts as a catalyst for hundreds of reactions that take place within the body. Some of the best examples of globular proteins are myoglobin, insulin, transferrin, and hemoglobin.

What are fibrous proteins?

Fibrous proteins are proteins that remain insoluble in water, acids, bases, and other similar compounds. Compared to globular proteins, they have stronger intermolecular attractive forces. Therefore, they do not dissolve or split easily. They have a rod-like, thread-like, or leaf-like structure, which makes them less complex in shape. As the name suggests, most fibrous proteins are cross-linked in such a way that they form fibrous structures. They are just as important as other proteins, although they have more work to do in the body’s mechanical support function. From providing tensile strength, stiffness, elasticity,

Key differences
  1. Globular proteins are soluble in water, acids and bases, while fibrous proteins remain insoluble in water and other compounds mentioned above.
  2. Globular proteins have spherical, ball-shaped shapes, which are three-dimensional (3D) in nature as they are made up of various folds in polypeptide chains. On the other hand, fibrous proteins have a rod-like, thread-like, or sheet-like structure.
  3. Globular proteins have weak intermolecular hydrogen bonds, while fibrous proteins have stronger intermolecular force between molecules.
  4. Globular proteins perform various functions, including the transport of oxygen in the blood, the metabolism of glucose, the storage of oxygen in the muscles, and they act as catalysts for hundreds of reactions that take place within the body. On the other hand, fibrous proteins perform dozens of functions; from providing tensile strength, stiffness, elasticity, to providing structural functions such as the formation of scaffold structures within cells and membrane structures.

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