5.4 proteins- structure and function Flashcards
the four levels of protein structure
primary secondary tertiary quaternary
whats the primary structure
the protein’s unique sequence of amino acids
whats the secondary structure
the coils and fold in polypeptide chains as result of hydrogen bonds in between the repeating parts of the polypeptide backbone
a delicate helix held together by hydrogen bonding between every fourth amino acid
∂ helix
Hydrogen bonds between 2 parallel polypeptide chains
B pleated sheet
whats a teritiary structure
what is the hydrophobic interaction in tertiaty structures
what are disulfide bridges
when 2 amino acids with the sulfhydryl group (-SH) are brought close together by the folding of the protein and the sulfurs bond
whats the quaternary structure
when theres more than one polypeptide chain, the protein structures results from bonding in all of them to each other and to themself..
when a protein unravels and loses its native shape
denaturation
proteins that assist other proteins to fold
how does a chaperone protein work?
more of like a shelter
a hollow cylinder with a cap
