Structure of Proteins

Question 1

primary structure

Answer 1

• amino acid sequence

- can consist of any sequence of amino acids tr

Question 2

secondary structure

Answer 2

• hydrogen bonding patterns
• amino acid side groups and peptide groups of main chain can also form hydrogen bonds
• if peptide is coiled it could form a HELIX

Question 3

tertiary structure

Answer 3

• folded shape of a globular protein
• contains regions that have secondary structure
• driven to this structure by hydrophobic exclusion
• changing a single amino acid could drastically change the structure

Question 4

quaternary structure

Answer 4

• when 2 or more polypeptide chains associate to form a functional protein, individual chains referred to as subunits
• interfaces are usually nonpolar