Proteolytic enzymes Flashcards
break the peptide bonds that maintain the primary protein structure
proteolytic enzymes
is an enzyme that hydrolyzes dietary proteins in the small intestine
Chymotrypsin
chymotrypsin acts specifically at peptide bonds on the __________ of the peptide bond
carbonyl side
The C-terminal amino acids of the peptides released by bond cleavage are
methionine, tyrosine, tryptophan, and phenylalanine
The specificity of chymotrypsin depends upon the presence of a
hydrophobic pocket,
a cluster of hydrophobic amino acids brought together by the three-dimensional folding of the protein chain.
hydrophobic pocket,
The flat aromatic side chains of certain amino acids (tyrosine, tryptophan, phenylalanine) slide into this pocket, providing the binding specificity required for
catalysis at the catalytic site
chymotrypsin cleaves the bond between
phenylalanine and glycine, which is the peptide bond on the carbonyl side of amino acids having an aromatic side chain.
trypsin, chymotrypsin, and elastase all hydrolyze peptide bonds
The pancreatic serine proteases
As the name suggests, they are produced in the ____and subsequently transported to the _____-
pancreas
small intestine
These enzymes are the result of
divergen evolution
cleaves peptide bonds on the carbonyl side of aromatic amino acids and large, hydrophobic amino acids such as methionine.
Chymotrypsin
cleaves peptide bonds on the carbonyl side of basic amino acids.
Trypsin
cleaves peptide bonds on the carbonyl side of glycine and alanine.
Elastase