Determine the mRNA sequence for the wild type polypeptide by identifying the codons that correspond to each amino acid. The first codon has been filled in for you. Codon information can be found in the codon access table.
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![The table shows the partial sequences of a wild type polypeptide and three mutant polypeptides as well as the type of single
nucleotide mutation that produced each mutant polypeptide.
Peptide sequence
Met - Leu - Arg - Ile - ...
Type of mutation
Wild type
Met - Leu - Arg - Met - ...
Met - Leu - [STOP]
Mutant 1
transition
Mutant 2
transversion
Mutant 3
Met - Phe - Arg - Ile - ...
transition
Determine the mRNA sequence for the wild type polypeptide by identifying the codons that correspond to each amino acid. The
first codon has been filled in for you. Codon information can be found in the codon access table.
Met
Leu
Arg
Ile
Answer Bank
CỦA
AUA
CGU
CGA
AUG
AUC
AGA
UUG
CÚC](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffbfd0029-e037-4bef-a6dc-2fab8c35ba69%2Fe42899a8-ad8d-4cc1-9a6b-7d96e853a4bf%2F6dxlao_processed.png&w=3840&q=75)
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- A particular protein has the amino acid sequenceN . . . Ala-Pro-His-Trp-Arg-Lys-Gly-Val-Thr . . . Cwithin its primary structure. A geneticist studyingmutations affecting this protein discovered that several of the mutants produced shortened protein molecules that terminated within this region. In one ofthem, the His became the terminal amino acid.a. What DNA single-base change(s) would cause theprotein to terminate at the His residue?b. What other potential sites do you see in the DNAsequence encoding this protein where mutation ofa single base pair would cause premature termination of translation?Shown below are two homologous lengths of the alpha and betachains of human hemoglobin. Consult a genetic code dictionary and determine how many amino acid substitutionsmay have occurred as a result of a single nucleotidesubstitution. For any that cannot occur as a result of a singlechange, determine the minimal mutational distance. Alpha: ala val ala his val asp asp met proBeta: gly leu ala his leu asp asn leu lysHydroxylamine (NH2OH) converts cytosine to the compound shown below. With which base does this modifi ed cytosine pair? Does this generate atransition or a transversion mutation?
- A heptapeptide when treated with trypsin produced two peptides. T1 (D, G, Y) and T2 (K, F, V, A). When the heptapeptide was treated with chymotrypsin, three peptides were produced: CT1 (K,,Y, G), CT2 (F,A, V), and CT3 (D). The sequences of these peptides is not known, however. When the peptide was treated with Sanger’s Reagent and hydrolyzed, DNP-K and DNP-A were recovered. What is the amino acid sequence of the heptapeptide?Based on the information in as shown, which single-nucleotide mutationevent is more likely: Arg-to-His, or Arg-to-Ser? Explain.What is the length in AA’s of the LilP protein? Assume fMet is NOT CLEAVED. Enter just the number, nothing else! Write out the sequence of the polypeptide in AA: use the three letter notation, e.g. Met-Ser-Pro- A lilP mutant called lilPXS is isolated that produces a truncated polypeptide of only 6 AA in length. Describe a single basepair DNA change that would lead to this truncated version of the protein. Multiple options are possible (100 words max.)
- A normal polypeptide and a mutant of the polypeptide were hydrolyzed by an endopeptidase under the same conditions. The normal and mutantpolypeptide differ by one amino acid. The fingerprints of the peptides obtained from the two polypeptides are shown below. What kind of amino acid substitution occurred as a result of the mutation? (That is, is the substituted amino acid more or less polar than the original amino acid? Is its pI lower or higher?) (Hint: Photocopy the fingerprints, cut them out, and overlay them.)As part of a project investigating potential new drug targets in the fight against malaria, you are seeking to clone the gene for a protein from the malaria parasite Plasmodium falciparum. You wish to express this protein in BL21 (DE3) cells, a standard laboratory strain of Escherichia coli. After purification of your protein, you run an SDS-PAGE gel and notice that the major band has lower molecular weight than expected, so you fear you are getting a truncated version. 1. What technique could you use to confirm that you are obtaining a shortened version of your intended protein? explainAs part of a project investigating potential new drug targets in the fight against malaria, you are seeking to clone the gene for a protein from the malaria parasite Plasmodium falciparum. You wish to express this protein in BL21 (DE3) cells, a standard laboratory strain of Escherichia coli. After purification of your protein, you run an SDS-PAGE gel and notice that the major band has lower molecular weight than expected, so you fear you are getting a truncated version. (a) Give TWO possible causes of your protein becoming truncated. explain
- A recent genome sequencing project for the bacterium Burkholderia mallei has identified a new protein with high similarity to the lysylphosphatidylglycerol flippase enzyme. A short section of the new protein sequence is shown below. TVEVNAPGDVQKALSELQQINDGRLDIRI (a) Are any reverse turns likely to be present? Explain your answer. (b) Are any beta-strands likely to be present? Explain your answer. (c) Are any alpha helices likely to be present? Explain your answer. (d) Is any supersecondary structure likely to be present? Explain your answer. (e) Identify two residues that are likely to be buried in the core of the folded protein. Explain your answer. (f) Identify two residues that are likely to be hydrogen bonded to each other. Explain your answer.List two possible missense mutation effects on the new polypeptide.Below is a sequence of DNA. 5'-ttaccgataattctctctcccctcttccatgattctgattaaagaaggcgagaacgaaactatttgttaatacc-3' Using the one letter code for Amino Acids, what is the predicted AA sequence of the shortest ORF (from N to C-terminal end)? Using the one letter code for Amino Acids, what is the predicted AA sequence of the longest ORF (from N to C-terminal end)?