The sequence and number of amino acids in the polypeptide
1 of 9
Define the secondary structure of a protein
The formation of alpha helices and beta pleated sheets stabilized by hydrogen bonding
2 of 9
Why do secondary structures form?
Due to the polar covalent bonds of the a.a., usually folding so there are hydrogen bonds between C=O, and N-H
3 of 9
What do the alpha helices and beta pleated sheets look like?
Alpha helixes look like spiral staircases. Beta pleated sheets look like corrugated roofing.
4 of 9
Define the tertiary structure of a protein
The further folding of the polypeptide stabilized by interactions between R groups
5 of 9
What are the interactions that form the tertiary structure of proteins?
1. Positively charged, and negatively charged R-groups. 2. Hydrophobic, and hydrophilic R-groups orientation to water. 3. Bonds between polar R-groups. 4. R-group of cysteine can form a covalent bond with another cysteine forming a disulphide bridge
6 of 9
Define the quartenary structure of a protein
This exists in proteins with more than one polypeptide chain, or with prosthetic groups
7 of 9
In what proteins are tertiary structures common?
"Globular" proteins, enzymes
8 of 9
Define prosthetic groups
Non poly-peptide components
9 of 9
Other cards in this set
Card 2
Front
Define the secondary structure of a protein
Back
The formation of alpha helices and beta pleated sheets stabilized by hydrogen bonding
Card 3
Front
Why do secondary structures form?
Back
Card 4
Front
What do the alpha helices and beta pleated sheets look like?
Comments
No comments have yet been made