Concept explainers
The amino acid sequence of part of a protein has been determined:
N……Gly Ala Pro Arg Lys…..C
A mutation has been induced in the gene encoding this protein using the mutagen proflavin. The resulting mutant protein can be purified and its amino acid sequence determined. The amino acid sequence of the mutant protein is exactly the same as the amino acid sequence of the wild-type protein from the N terminus of the protein to the glycine in the preceding sequence. Starting with this glycine, the sequence of amino acids is changed to the following:
N…...Gly His Gln Gly Lys…..C
Using the amino acid sequences, one can determine the sequence of 14
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Chapter 8 Solutions
ND STONY BROOK UNIVERSITY LOOSELEAF GENETICS: FROM GENES TO GENOMES
- A Sanger product of the sequencing of a template DNA is presented below. It is the polymorphic peptide sequence of Protein Ser-Gly-Lys-Glu-Gly-Lys-Lys. Determine the sequence of template DNA and the mRNA sequence from this template DNA. Briefly explain.arrow_forwardThe enzyme dihydrofolate oxidase has 3 adjacent asparagines residues (codon for asparagines is ACC): explain how site directed mutagenesis could be used to increase the thermal stability of the proteinarrow_forwardReferring to the genetic code presented in Figure , give the aminoacids specified by the following bacterial mRNA sequences. Q. 5′ –UUUGGAUUGAGUGAAACGAUGGAUGAAAG AUUUCUCGCUUGA–3′arrow_forward
- Referring to the genetic code presented in Figure , give the aminoacids specified by the following bacterial mRNA sequences. Q. 5′ –AUGUUUAAAUUUAAAUUUUGA–3′arrow_forwarda- Name the figure which shows the Co-translational translocation. A or B b -list the molecules which are required for Co-translational translocation. c- Suppose you want to impair the co-translational translocation of Star protein to ER. Which strategy you choose to prevent the translocation of the Star protein to ER and maintain it in the cytoplasm. Limit your answer to two sentences. asap please.arrow_forwardConsider the following coding 71 nucleotide DNA template sequence (It does not contain a translational start): 5’- GTTTCCCCTATGCTTCATCACGAGGGCACTGACATGTGTAAACGAAATTCCAACCTGAGCGGCGT GTTGAG-3’ By in vitro translating the mRNA, you determined that the translated peptide is 15 amino acids long. What is the expected peptide sequence in single letter abbreviations?arrow_forward
- Complete the protein synthesis for the partial DNA sequence for a normal FGFR3 gene (TOP) and mutated FGFR3 gene (BOTTOM). Remember, when filling in mRNA, use capital letters only. When filling in amino acids, use three letters, with the first letter capitalized. If you do not use this format, your answer may be marked wrong. DNA CCG TTC GGG GAA ССС MRNA Amino Acid DNA CCG TTC GGG GAA TCC MRNA Amino Acidarrow_forwardA 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 mutant form= lys-val-his-his-leu-met-ala-ala-lys. Decipher the segment of mRNA for both the original protein and the double mutant. Which base was added? Which was deleted?arrow_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_forward
- Referring to the genetic code presented in Figure , give the aminoacids specified by the following bacterial mRNA sequences. Q. 5′ –GUACUAAGGAGGUUGUAUGGGUUAGGGG ACAUCAUUUUGA–3′arrow_forwardExplain the significance of the following statement: The functioning of the aminoacyl-tRNA synthetases is referred to as the second genetic code.arrow_forwardSickle cell hemoglobin DNA CACGTAGACTGAGG ACAC.. Sickle cell hemoglobin MRNA Sickle cell hemoglobin AA sequence 4. What type of mutation is this? Please explain why.arrow_forward
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