Chapter 7.1 Proteins Flashcards
Similarities and differences in amino structures?
All contain amino acids but the sequence itself is unique to every structure.
What happens during denaturation?
Disrupts H and ionic bonds. Uses heat, pH levels, and salinity.
What is a hydrophobic interaction?
Clusters away from water.
What is a hydrophilic interaction?
Forms hydrogen bonds.
What is an acidic and basic interaction?
Forms ionic bonds.
What is a cysteine interaction?
Forms disulfide bonds.
What do these interactions have to do with the tertiary level?
They create the final shape of the structure.
What are some examples of protein types and their functions?
Storage: bean storage proteins
Movement: muscle fibers
Transport: through channels and pumps
Identification: cell surface proteins(labels)
Defense: Antibodies that recognize the labels.
Chemical reactions: enzymes
Structure: keratin and collagen
Communication: Hormones and receptors
Why and how would the structure and function of a protein change if a hydrophobic amino acid was substituted for a hydrophilic one?
it would change how the structure is folded to meet all the criteria for each amino acid, so the hydrophilic are on the outside, hydrophobic go inwards, etc.
What is the first level of the protein structure?
Primary - Order of amino acids, unique sequence
What is the second level?
Secondary- Folding of beta pleated sheets and alpha helixs.
Third level?
Tertiary - Interactions between side chains and amino acids. The 3D shape of a single polypeptide.
What is the fourth level?
Quaternary - More than one polypeptide bonded together.
