CHAPTER 19: Unit 4. Types of Proteins: Tertiary Structures

CHEM 1152 MODULE 19: AMINO ACIDS & PROTEINS CHAPTER 19: Unit 4. Types of Proteins: Tertiary Structures

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The videos below illustrate the tertiary protein structures:

The figure below illustrates the tertiary protein structure with the folding model exhibiting all types of intermolecular forces, interactions and bonds:

Reference: https://www.youtube.com/watch?v=odyLkR5KSfs

Reference: https://www.youtube.com/watch?v=odyLkR5KSfs

1. Hydrophobic interactions:
Interaction between the R hydrophobic groups within the interior of the protein molecules.

2. Hydrophilic interactions:
Interactions between the hydrophilic groups between the external aqueous media and the R groups of polar amino acids which are pulled out and form hydrogen bond.

3. Hydrogen bonds:
Interactions between the H atoms of polar amino acids and the O atom of another amino acid.

4. Disulfide bonds:
Interactions between the -SH and groups of cysteines in polypeptide chain of the tertiary structure of the protein.

5. Salt bridges:
Interactions between the R groups of the polar acidic or basic amino acids

Quizzes

Practice Quiz: Module 19 Unit 4

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