Protiens Flashcards
What are the biological role of proteins ? (S,C,S,I)
Structural- body tissue, muscles, hair
Catalytic- enzymes
Signaling- hormones, receptors
Incommunicable- antibodies
General structure of amino acids? 3
Amino group
R group
carboxyl group
Why is the r group special?
Defines the amino acid because of its variation.
What side is the basic and acidic when dissolved in water?
The amino group is more basic - ((gaining a H+))
The carboxyl group is more acidic-
((releasing a H+ gaining -))
What bond are amino acids joined by?
Peptide bond
What bond is it called when two amino acids join together?
Dipeptide bond
What bond it is called when many animo acids are bonded together?
Polypeptide bond/ chain
What is amino acids primary structure?
When a sequence of amino acid is joined together to make a polypeptide chain.
What is involved in secondary structure?
Polypeptide chain shaped into:
a-helix,
B-pleated sheet
(Secondary structure) what are the shapes held by?
Between?
Held in shape by hydrogen bond
Between= -NH (amino group) and -CO (carboxyl group)
What is tertiary structure?
Using what interactions?
The coils of polypeptide chain into a 3D shape affected by the r group interaction.
(Tertiary structure) what r group interactions cause the 3D shape? 4 1/2
-Hydrophilic/ hydrophobic interactions
-disulphide bridges/ bonds
-ionic bonds
-hydrogen bonds
What is quaternary structure?
What are they called?
Protein consisting of more than one polypeptide chain called subunits.
