Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 30P
A fragment of a wild
Wild
polypeptide |
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Mutant
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Mutant
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Mutant
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Mutant
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a. Use the available information to characterize each mutant.
b. Determine the wild
c. Identify the mutation that produces each mutant polypeptide.
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A single base addition and a single base deletion approximately 15 bases apart in the mRNA specifying the protein lysozyme from the bacterial virus T4 caused a change in the protein from its wil-type composition….lys-ser-pro-ser-leu-asn-ala-ala-lys…..to the mutant form lys-val-his-his-leu-met-ala-alalys.a. Decipher the segment of mRNA for both the original protein and the double mutant.b. Which base was added? Which was deleted?
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?
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
Chapter 11 Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Ch. 11 - 11.1 Identify two general ways chemical mutagens...Ch. 11 - 11.2 Nitrous acid and (BU) alter DNA by different...Ch. 11 - 11.3 What is the difference between a transition...Ch. 11 - What is the difference between a synonymous...Ch. 11 - 11.5 UV irradiation causes damage to bacterial...Ch. 11 - Ultraviolet (UV) radiation is mutagenic.
What...Ch. 11 - Researchers interested in studying mutation and...Ch. 11 - The effect of base - pair substitution mutations...Ch. 11 - Describe the purpose of the Ames test. How are...Ch. 11 - 11.10 In numerous population studies of...
Ch. 11 - 11.11 Two different mutations are identified in a...Ch. 11 - What is the phenotype effect of inserting a Ds...Ch. 11 - 11.13 Answer the following questions concerning...Ch. 11 - Several types of mutation are identified and...Ch. 11 - 11.15 A sample of the bacterium is exposed to...Ch. 11 - 11.16 A strain of is identified as having a null...Ch. 11 - Describe the difference between DNA transposons...Ch. 11 - 11.18 How are flanking direct repeat sequences...Ch. 11 - 11.19 Using the adeninethymine base pair in this...Ch. 11 - The partial amino acid sequence of a wild-type...Ch. 11 - Prob. 21PCh. 11 - 11.22 Many human genes are known to have homologs...Ch. 11 - The fluctuation test performed by Luria and...Ch. 11 - In this chapter, three features of genes or of DNA...Ch. 11 - Briefly compare the production of DNA double -...Ch. 11 - During mismatch repair, why is it necessary to...Ch. 11 - 11.27 Following the spill of a mixture of...Ch. 11 - 11.28 In an Ames test using Salmonella bacteria a...Ch. 11 - A wild - type culture of haploid yeast is exposed...Ch. 11 - A fragment of a wild - type polypeptide is...Ch. 11 - Prob. 31PCh. 11 - Alkaptonuria is a human autosomal recessive...Ch. 11 - 11.33 In an experiment employing the methods of...Ch. 11 - Using your knowledge of DNA repair pathways choose...Ch. 11 - 11.35 Ataxia telangiectasia is a human inherited...Ch. 11 - A geneticist searching for mutations uses the...Ch. 11 - 11.37 In a mousebreeding experiment a new mutation...Ch. 11 - 11.38 Considering the Dumbo mutation in a Problem,...Ch. 11 - 11.39 Thinking back to the discussion of...Ch. 11 - 11.40 Common baker’s yeast () is normally grown at...Ch. 11 - 11.41 The two gels illustrated below contain...
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- A single base addition and a single base deletion approximately 15 bases apart in the mRNA specifying the protein lysozyme from the bacterial virus T4 caused a change in the protein from its wild-type composition...lys-ser-pro-ser-leu-asn-ala-ala-lys....to the lys-val-his-his-leu-met-ala-ala-lys. a. Decipher the segment of MRNA for both the original protein and the double mutant. mutant form b. Which base was added? Which was deleted?arrow_forward5'......TACTGCCCATGCCCAGAGAGAAAGCGCAGACGCGTCTAAactgt... 3' a). (10 points). In the above sequences, the open reading frame is indicated by alternating non-underlined and underlined triplets. Please use the codon table to deduce the amino acid sequence for the region shown in the wildtype protein. Wildtype AA sequence for the region around mutation #1: Wildtype AA sequence for the region around mutation #2: b). (10 points). Please make predictions what molecular change mutation #1 and mutation #2 cause. c). (5 points). Which mutation is more likely to abrogate the protein function? Why?arrow_forward5'....TACTGCCCATGCCCAGAGAGAAAGCGCAGACGCGTCTAA actgt... 3' a). (10 points). In the above sequences, the open reading frame is indicated by alternating non-underlined and underlined triplets. Please use the codon table to deduce the amino acid sequence for the region shown in the wildtype protein. Wildtype AA sequence for the region around mutation #1: Wildtype AA sequence for the region around mutation #2: b). (10 points). Please make predictions what molecular change mutation #1 and mutation #2 cause. c). (5 points). Which mutation is more likely to abrogate the protein function? Why?arrow_forward
- Which of the following sequences is most likely to form a beta-turn? Explain why? Sequence A: Ser-Pro-Asn-Val Sequence B: Gly-Ser-Asn-Pro Sequence C: Ser-Asn-Gly-Valarrow_forwardA wildtype gene produces the polypeptide sequence: Wildtype: Met-Ser-Pro-Arg-Leu-Glu-Gly Each of the following polypeptide sequences is the result of a single mutation. Identify the most likely type of mutation causing each, be as specific as possible. M1:Met-Ser-Ser-Arg-Leu-Glu-Gly missense mutation M2:Met-Ser-Pro M3:Met-Ser-Pro-Asp-Trp-Arg-Asp-Lys M4:Met-Ser-Pro-Glu-Gly nonsense mutation frameshift insertion in frame deletion M5:Met-Ser-Pro-Arg-Leu-Glu-Gly in frame insertionarrow_forwardSuppose part of the amino acid sequence of a protein is N... Gly-Ala - Pro-Arg-Lys ...C. Which of the following amino acid sequences could result from a frameshift mutation (+1 or -1) in the part of the gene that encodes this sequence of amino acids? O O N... Gly- Ala-Asn - Ser - Leu ...C N...Ala-Ala-Arg-Pro - Lys...C N...Gly-Gly-Thr-Thr-Glu...C N... Gly-Ala-His-lle - Val ...C N... Gly-His-Thr - Met - Val ...Carrow_forward
- 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.)arrow_forwardWith this DNA sequenec: - 5'-GCAATGGAGAGAATCTGCGCG-3'- - 3'-CGTTACCTCTGTTAGACGCGC-5' - -Identify the sequencce of RNA in which the protein product will be detrnemined. -What will be the protein product sqeuence? -What will be the pl of the protein product?arrow_forwardWhat potential polypeptides can be produced from the following mRNA sequence? There are more than one answer.. 5’ ...GGAGCUCGUUGUAUU... 3’ a. ser-ser-leu-tyr b. leu-cys-cys-ser-arg c. gly-ala-ser-trp-ile d. gly-ala-arg-cys-ile e. glu-leu-val-val f. You can't translate without a start codon. I know (d) is one of the answer but I'm stuck on how to find the rest. Please help.arrow_forward
- A normal hemoglobin protein has a glutamic acid at position 6; in sickle-cell hemoglobin, this glutamic acid has been replaced by a valine. List all the possible mRNA codons that could be present for each type of hemoglobin. Can a single base change result in a change from Glu to Val in hemoglobin?arrow_forwardCystic fibrosis (CF) is an inherited disorder caused by different types of mutations, many of which prevent ions from moving across cell membranes. Normally there are channel proteins that allow passage of the ions, but in patients with one kind of CF these proteins seem odd. Closer examination shows that these proteins display the correct amino acid sequence. However, they fail to do their job. A) Given that the primary structure of the protein is correct, what can you infer about the DNA sequence for the gene coding this protein on this patient, is there a mutation? Explain. B) Why is the primary structure insufficient to guarantee the proper function of the protein?arrow_forwardGiven the following Wild Type and Mutated DNA sequences: 1.) Identify where the base pair change occurs ( what letter changed?) 2.) For BOTH sequences, write the mRNA strands, define the codon regions and amino acid sequences. 3.) Describe what kind of mutation has occurred (missense, nonsense, or silent), and what effect this may have on the protein. Wild Type DNA Sequence: 3' - AGGCTCGCCTGT - 5' Mutated DNA Sequence: 3' - AGTCTCGCCTGT - 5'arrow_forward
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