The formation of a protein

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  • Created by: Maddie
  • Created on: 20-02-13 11:01

The formation of a protein;

Primary structure;

  • two amino acids join in a condensation reaction to form a dipeptide with a peptide bond forming between the two subunits.
  • This process is repeated to form polypeptide chains.
  • A protein is made up of 1 or more of these polypeptide chains.
  • The sequence of amino acids in the polypeptide chains is known as the primary structure.

Secondry structure;

  • A chain of amino acids may twist to form an alpha helix with hydrogen bonds forming between the c-o and NH stabilising the shape.

 

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The formation of a protein;

Tertiary structure;

  • A polypeptide chains bends and folds to produce a precise 3D shape. Chemical bonds and hydrophobic interactions between R groups maintain the tertiary shape.

Quaternary structure;

  • Only proteins made up of more than 1 polypeptide chain have a quaternary structure.
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