Structures of Proteins
- Created by: _laurenb
- Created on: 11-04-15 16:54
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- Structure of Proteins
- Primary Structure
- The number and sequence of amino acids in a polypeptide chain
- Haemoglobin had over 100 amino acids in 4 polypeptide chains
- The number and sequence of amino acids in a polypeptide chain
- Secondary Structure
- The folding of the polypeptide chains
- Either alpha-helix or beta-pleated sheet
- Held together by weak hydrogen bonds
- Quaternary Structure
- Only proteins with more than one polypeptide chain have this
- Haemoglobin has 4 polypeptide chains
- Collagen has 3 polypeptide chains
- Tertiary Structure
- The further folding of polypeptide chains in a protein to give the 3D shape
- 4 types of bonds between R groups
- 1. Weak hydrogen bonds
- 2. Charge R groups? Ionic bonds between the R groups
- 3. Non-polar R groups? Hydrophobic interactions between R groups
- 4. Sulfur R groups? Strong disulfide bonds between R groups
- Primary Structure
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