Proteins Flashcards
What are the 7 functions of proteins?
Enzyme
Defence
Storage
Transport
Hormone
Receptor
Contractile and motor
Structural
What is the structure of a generic amino acid?
What are the four levels of stucture in a protein?
Primary
Secondary
Tertiary
Quaternary
What are the 3 main types of amino acids?
Non-polar, polar uncharged and charged
What are the three special amino acids?
Methionine (first amino acid in a chain)
Cystine (makes disulphide bridges)
Proline (makes bends)
Give an example of a non-polar, polar uncharged and charged amino acid.
Glycine
Serine
Aspartic acid
What reaction joins amino acids together?
Dehydration synthesis
What reaction breaks amino acids apart?
Hydrolysis
How do you called the sequence of amino acids that is joined by peptide bonds?
Primary structure
What gives rise to the secondary structure?
What are the two types of secondary structure?
alpha helix
beta pleated sheet
What gives rise to the tertiary structure?
Interactions between R-groups
What are the 5 types of interactions giving rise to the tertiary structure?
Hydrogen bonding
Hydrophobic exclusion
Van der Waals interaction
Disulphide bridge
Ionic bond
What give rise to the quaternary structure?
Interactions between polypeptides
How is called the proteins that provide favourable conditions for the correct folding of other proteins, thus preventing aggregation? They are cylindric in shape.
Chaperonin
