Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 13, Problem 19RE
Interpretation Introduction
Interpretation:
The dangers of the recombinant DNA technology are to be determined.
Concept introduction:
Introduction of DNA into the genome of virus and bacteria is possible. It is known as insert.
Usually, insert is tagged to a plasmid, which is a small circular DNA present in bacteria.
The insert grows and makes multiple copies by the process of cloning.
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The beta-lactamase hydrolyzes the lactam-ring in penicillin. Describe the mechanism
of hydrolysis, insuring to include the involvement of S, D, & K in the reaction sequence. Please help
To map the active site of beta-lactamase, the enzyme was hydrolyzed with trypsin to yield a hexapeptide (P1) with the following amino acids. Glu, Lys, Leu, Phe, Met, and Ser. Treatment of P1 with phenyl isothiocyanate yielded a PTH derivative of phenylalanine and a peptide (P2). Treatment of P1 with cyanogenbromide gave an acidic tetrapeptide (P3) and a dipeptide (P4).Treatment of P2 with 1-fluoro-2,4-dinitrobenzene, followed by complete hydrolysis, yields N-2,4-dinitrophenyl-Glu. P1, P2, and P3 contain the active site serine.
Why doesn't D in this hexapeptide not participate in the hydrolysis of the beta-lactam ring even though S, K, and D are involved in the catalyst?
To map the active site of -lactamase, the enzyme was hydrolyzed with trypsin to yield a hexapeptide (P1) with the following amino acids. Glu, Lys, Leu, Phe, Met, and Ser. Treatment of P1 with phenyl isothiocyanate yielded a PTH derivative of phenylalanine and a peptide (P2). Treatment of P1 with cyanogenbromide gave an acidic tetrapeptide (P3) and a dipeptide (P4).Treatment of P2 with 1-fluoro-2,4-dinitrobenzene, followed by complete hydrolysis, yields N-2,4-dinitrophenyl-Glu. P1, P2, and P3 contain the active site serine.
Using the experimental results described above derive the primary sequence of the active site hexapeptide. Please help!
Chapter 13 Solutions
Biochemistry
Ch. 13 - RECALL What advantages does fluorescent labeling...Ch. 13 - RECALL What methods are used to visualize...Ch. 13 - REFLECT AND APPLY When proteins are separated...Ch. 13 - RECALL How does the use of restriction...Ch. 13 - RECALL What is the importance of methylation in...Ch. 13 - RECALL Why do restriction endonucleases not...Ch. 13 - Prob. 7RECh. 13 - Prob. 8RECh. 13 - RECALL What do the following have in common? MOM;...Ch. 13 - RECALL Give three examples of DNA palindromes.
Ch. 13 - RECALL What are three differences between the...Ch. 13 - RECALL What are sticky ends? What is their...Ch. 13 - RECALL What would be an advantage of using HaeIII...Ch. 13 - RECALL Describe the cloning of DNA.Ch. 13 - RECALL What vectors can be used for cloning?Ch. 13 - RECALL Describe the method you would use to test...Ch. 13 - RECALL What is blue/white screening? What is the...Ch. 13 - Prob. 18RECh. 13 - Prob. 19RECh. 13 - Prob. 20RECh. 13 - Prob. 21RECh. 13 - Prob. 22RECh. 13 - Prob. 23RECh. 13 - REFLECT AND APPLY What are the requirements for an...Ch. 13 - Prob. 25RECh. 13 - Prob. 26RECh. 13 - REFLECT AND APPLY The genes for both the a- and...Ch. 13 - REFLECT AND APPLY Outline the methods you would...Ch. 13 - Prob. 29RECh. 13 - Prob. 30RECh. 13 - Prob. 31RECh. 13 - Prob. 32RECh. 13 - RECALL Why is temperature control so important in...Ch. 13 - RECALL Why is the use of temperature-stable DNA...Ch. 13 - RECALL What are the criteria for good primers in a...Ch. 13 - REFLECT AND APPLY What difficulties arise in the...Ch. 13 - REFLECT AND APPLY Each of the following pairs of...Ch. 13 - RECALL What is qPCR?Ch. 13 - Prob. 39RECh. 13 - REFLECT AND APPLY Suppose that you are a...Ch. 13 - REFLECT AND APPLY Why is DNA evidence more useful...Ch. 13 - REFLECT AND APPLY Give the DNA sequence for the...Ch. 13 - Prob. 43RECh. 13 - Prob. 44RECh. 13 - Prob. 45RECh. 13 - Prob. 46RECh. 13 - Prob. 47RECh. 13 - RECALL Has proteomic analysis been done on...Ch. 13 - Prob. 49RECh. 13 - Prob. 50RECh. 13 - Prob. 51RECh. 13 - RECALL What are the key differences between DNA...
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