The amino acids serine glutamate and phenylalanine were foun
The amino acids serine, glutamate, and phenylalanine were found to be important binding groups in a receptor binding site. The triplet codes for these amino acids in the mRNA for tis receptor were AGU, GAA, and UUU respectively. Explain the effect the following mutations might have if any:
AGU to ACU
AGU to GGU
AGU to AGC
GAA to GAU
GAA to AAA
GAA to GUA
UUU to UUC
UUU to UAU
UUU to AUU
UUU to AAU
Solution
Mutation
AGU to ACU : Serine to Threonine mutation. Since serine is an important receptor binding site amino acid, The receptor can no longer bind to the protein because of change in the active site composition.
AGU to GGU:Serine to Glycine mutation causes A>G mutation with siilar effect as above, i.e change in the active site composition
AGU to AGC Serine>Serine U>C mutation is a silent mutation causes no change to the binding site
GAA to GAU Glutamic acid >Aspartic acid A>U mutation causes change in second amino acid of core binding site protein.
GAA to AAA Glutamic acid> Lysine G>A mutation
GAA to GUA Glutamic acid>Valine A>U mutation
UUU to UUC : Phenylalanine > Phenylalanine U>C mutation is a silent mutation causes no change in the protein
UUU to UAU: Phenylalanine > Tyrosine U>A mutation causes change in protein sequence
UUU to AUU Phenylalanine>Isoleucine U>A mutation change in protein sequence
UUU to AAU:Phenylalanine> Asparagine UU>AA is a dinucleotide mutation causing change in the sequence causing the binding site composition to change
