Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 13, Problem 44FB
Summary Introduction
To review:
The given blank space in the statement, “In photosynthesis, _______ pigments absorb light energy and transfer it to the reaction center.”
Introduction:
The complex chemical process that involves the conversion of light energy to chemical energy in plants is photosynthesis. The pigments are the molecules involved in the selective wavelength absorption. The pigments change the color of the light transmitted or reflected, absorbing specific wavelengths of the light.
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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: The Molecular Basis of Life
Ch. 13 - Prob. 1QCh. 13 - Prob. 2QCh. 13 - Prob. 3QCh. 13 - Prob. 4QCh. 13 - Prob. 5QCh. 13 - Prob. 6QCh. 13 - Prob. 7QCh. 13 - Prob. 1RQCh. 13 - Prob. 2RQCh. 13 - Prob. 3RQ
Ch. 13 - Prob. 4RQCh. 13 - Prob. 5RQCh. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - Prob. 8RQCh. 13 - Prob. 9RQCh. 13 - Prob. 10RQCh. 13 - Prob. 11RQCh. 13 - Prob. 12RQCh. 13 - Prob. 13RQCh. 13 - Prob. 14RQCh. 13 - Prob. 15RQCh. 13 - Prob. 16RQCh. 13 - Prob. 17RQCh. 13 - Prob. 18RQCh. 13 - Prob. 19RQCh. 13 - Prob. 20RQCh. 13 - Prob. 21RQCh. 13 - Prob. 22RQCh. 13 - Prob. 23RQCh. 13 - Prob. 24RQCh. 13 - Prob. 25RQCh. 13 - Prob. 26RQCh. 13 - Prob. 27RQCh. 13 - Prob. 28RQCh. 13 - Prob. 29RQCh. 13 - Prob. 30RQCh. 13 - Prob. 31RQCh. 13 - Prob. 32RQCh. 13 - Prob. 33RQCh. 13 - Prob. 34RQCh. 13 - Prob. 35RQCh. 13 - Prob. 36RQCh. 13 - Prob. 37RQCh. 13 - Prob. 38RQCh. 13 - Prob. 39RQCh. 13 - Prob. 40RQCh. 13 - Prob. 41FBCh. 13 - Prob. 42FBCh. 13 - Prob. 43FBCh. 13 - Prob. 44FBCh. 13 - Prob. 45FBCh. 13 - Prob. 46FBCh. 13 - Prob. 47FBCh. 13 - Prob. 48FBCh. 13 - Prob. 49FBCh. 13 - Prob. 50FBCh. 13 - Prob. 51SACh. 13 - Prob. 52SACh. 13 - Prob. 53SACh. 13 - Prob. 54SACh. 13 - Prob. 55SACh. 13 - Prob. 56TQCh. 13 - Prob. 57TQCh. 13 - Prob. 58TQCh. 13 - Prob. 59TQCh. 13 - Prob. 60TQCh. 13 - Prob. 61TQCh. 13 - Prob. 62TQCh. 13 - Prob. 63TQCh. 13 - Prob. 64TQCh. 13 - Prob. 65TQCh. 13 - Prob. 66TQCh. 13 - Prob. 67TQCh. 13 - Prob. 68TQCh. 13 - Prob. 69TQCh. 13 - Prob. 70TQCh. 13 - Prob. 71TQCh. 13 - Prob. 72TQCh. 13 - Prob. 73TQCh. 13 - Prob. 74TQ
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