Proteins

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  • Created by: Ellie-Mae
  • Created on: 16-03-17 10:41
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  • Protein structure
    • They're polymers
      • Amino acids are the monomers
        • A dipeptide is formed when two amino acids are joined
          • A polypeptide is formed when two or more amino acids join
            • Proteins are made up of one or more polypeptides
              • Protein structure
                • They're polymers
                  • Amino acids are the monomers
                    • A dipeptide is formed when two amino acids are joined
                      • A polypeptide is formed when two or more amino acids join
                        • Proteins are made up of one or more polypeptides
                      • Amino acids have different variable groups (R)
                        • They have the same general structure
                          • A carboxyl group (-COOH)
                      • Amino acids all contain carbon, oxygen, hydrogen and nitrogen.
                        • Amino acids have different variable groups (R)
                          • They have the same general structure
                            • A carboxyl group (-COOH)
                  • There's four structural levels to protein
                    • Quaternary structure
                      • Some proteins are made of several different polypeptide chains held together by bonds
                        • An example is haemoglobin which is made of four polypeptide chains bonded together
                          • For proteins made from more than one polypeptide chain, the quaternary structure is the proteins final 3D structure
                  • Globular Proteins
                    • Examples of globular proteins
                      • Amylase
                        • An enzyme that catalyses the breakdown of starch in the digestive system
                        • Its secondary structure contains both alpha-helix and beta-pleated sheet sections
                  • Fibrous proteins
                    • Tough and Rope-Shaped
                      • Collagen
                        • Found in animal connective tissues such as bone skin and muscle
                        • Very strong molecule, minerals can bind to it to increase rigidity e.g. bone
          • Amino acids all contain carbon, oxygen, hydrogen and nitrogen.
        • There's four structural levels to protein
          • Quaternary structure
            • Some proteins are made of several different polypeptide chains held together by bonds
              • An example is haemoglobin which is made of four polypeptide chains bonded together
                • For proteins made from more than one polypeptide chain, the quaternary structure is the proteins final 3D structure
        • Globular Proteins
          • Examples of globular proteins
            • Amylase
              • An enzyme that catalyses the breakdown of starch in the digestive system
              • Its secondary structure contains both alpha-helix and beta-pleated sheet sections
        • Fibrous proteins
          • Tough and Rope-Shaped
            • Collagen
              • Found in animal connective tissues such as bone skin and muscle
              • Very strong molecule, minerals can bind to it to increase rigidity e.g. bone
      • An amino group (-NH2)
        • Which are attached to a carbon atom

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