Globular protein
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Globular Protein[edit | edit source]
Globular proteins are one of the common types of proteins found in nature. They are characterized by their compact, spherical shape, which is formed by the folding of the polypeptide chains into a three-dimensional structure. This folding is driven by the hydrophobic interactions that occur between the amino acid residues within the protein.
Structure[edit | edit source]
Globular proteins are typically soluble in water and have a dynamic, flexible structure. The tertiary structure of these proteins is stabilized by various interactions, including hydrogen bonds, ionic bonds, van der Waals forces, and disulfide bonds. The folding of the protein into its globular form is crucial for its biological function.
The primary structure of a globular protein, which is the sequence of amino acids, determines how the protein will fold into its final shape. The secondary structure elements, such as _-helices and _-sheets, are common motifs found in globular proteins.
Function[edit | edit source]
Globular proteins perform a wide variety of functions in biological systems. They can act as enzymes, which catalyze biochemical reactions, or as hormones, which regulate physiological processes. Other functions include serving as antibodies in the immune system, transporting molecules across cell membranes, and acting as receptors for signaling molecules.
One of the most well-known globular proteins is hemoglobin, which is responsible for the transport of oxygen in the blood. Hemoglobin's ability to bind and release oxygen is a direct result of its globular structure.
Examples[edit | edit source]
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