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Protein S&F (Option C). 20 Amino Acids 4 Levels of Protein Organization Primary Structure – the number and sequence of amino acids in a polypeptide.

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Presentation on theme: "Protein S&F (Option C). 20 Amino Acids 4 Levels of Protein Organization Primary Structure – the number and sequence of amino acids in a polypeptide."— Presentation transcript:

1 Protein S&F (Option C)

2

3 20 Amino Acids

4 4 Levels of Protein Organization Primary Structure – the number and sequence of amino acids in a polypeptide Determined by the base sequence of the gene that codes for the polypeptide

5 Secondary Structures Are regular repeating structures, stabilized by hydrogen bonds Alpha helix Beta-pleated Sheet

6 Tertiary Structure The three-dimensional conformation of a polypeptide. The conformational folding is stabilized by intramolecular bonds between amino acids and especially R-groups

7 Quaternary Structure The linking together of two or more polypeptides to form a single protein…. Exs. Insulin consists of 2 polypeptides Collagen consists of 3 polypeptides Hemoglobin consists of 4 polypeptides Conjugated proteins – quaternary proteins that contain a non-polypeptide component (posthetic group) Ex. Hemoglobin w/Fe++ containing heme groups

8 Insulin

9 Quarternary Structure Cont’d

10 Review

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