Dehalogenase enzymes catalyze the clevage of C-X bonds. One such dehalogenase catalyzes thefollowing reaction. An active site aspartate is thought to carry out the initial nucleophilic attack thatexpels the chloride. Select the most likely intermediate in the reaction. (Note the stereochemistry.Refer to P11.19 in the textbook if needed.)OOACDOE-CH₂HH₂C™ CO₂HBCO₂CINH₂O CrCO₂HCO₂нотумCH3DCO₂fiveNECH₂

A dehalogenase enzyme removes a halogen atom from a substrate. It is found in certain bacteria such…

Answered: Dehalogenase enzymes catalyze the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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The mechanism involved in the reaction catalyzed by phosphoglyceromutase is known to involve a phosphorylatedenzyme intermediate. If 3-phosphoglycerate is radioactively labeledwith 32P, the product of the reaction, 2-phosphoglycerate, does nothave any radioactive label. Design a mechanism to explain these facts.
Write the reaction for the hydrolysis of 1,3-bisphosphoglycerate coupled to the phosphorylation of ADP using the curved-arrow symbolism.
When grown anaerobically on glucose, yeast (S. cerevisiae) converts pyruvate to acetaldehyde, then reduces acetaldehyde to Pethanol using electrons from NADH. Write the chemical equation for the reaction that reduces acetaldehyde (CH3CHO) to ethanol (CH3CH2OH). The table provides the standard reduction potential, E', of the relevant half-reactions. Half-reaction Acetaldehyde + 2 H+ + 2e¯ → ethanol NAD+ + 2H+ + 2e¯ → NADH + H+ E'° (V) -.197 -.320 Calculate the equilibrium constant, K'eq, at 25.0 °C for the reaction that reduces acetaldehyde to ethanol. K'e ×10 = eq
What would be the characteristics of a transition-state analog for the chymotrypsin reaction?
The hydrolysis of a phenylalanine-containing peptide is catalyzed by a-chymotrypsin with the following results. Calculate KM and Vmax for the reaction. What is the equation of the line?
Determine whether the following reactions will be spontaneous under standard biochemical conditions. Include calculations for Delta G in your answer. Use Table 13-7 in your textbook to help you.a) 2NADH + 2H+ + O2 --> 2NAD+ + 2H2Ob) Malate + FAD --> Oxaloacetate + FADH2c) Pyruvate + H2S --> Lactate + S
Are fatty acid propyl esters (biodiesel) formed in the acid-catalysed esterification/transesterification reaction on waste oil more or less polar than glycerol? Briefly explain.
In solution, glucose exists predominantly in the cyclic hemiacetal form, which does not contain an aldehyde group. How is it possible for mild oxidizing agents to oxidize glucose?
Isocitrate lyase cleaves the 6-carbon isocitrate to glyoxylate and succinate.Draw a plausible mechanism for this reaction.
A reaction involved in the metabolism of sugars is the splitting of fructose-1,6-diphosphate to give glyceraldehyde-3- phosphate and dihydroxyacetone phosphate. In the living system, this retro-aldol is catalyzed by an enzyme called aldolase; however, it can also be catalyzed by a mild base. Propose a mechanism for the base-catalyzed reaction. CH,-0-P-0- CH,-0-P-0- C=0 C=0 CH,OH dihydroxyacetone phosphate HO-C-H aldolase or "OH H-C-OH H-C-OH H-C-OH CH,-0-P-0- CH2-0-P-0- fructose-1,6-diphosphate glyceraldehyde-3-phosphate
Given the following choices,a. what is the structure of the product of the reaction catalysed by ACAT?b. structure of the product produced from the reaction catalysed by phospolipase A2?c. general structure of TAGd. structure of glycerol
The hexapeptide Ala-Met-Leu-Lys-Phe-Asp is digested in the same tube with both Cyanogen Bromide and Trypsin at the same time at pH=7. Draw the structure of the product(s) that would bind to a cation exchange column. (Relevant pKa values are 2.2, 3.9, 9.5 and 10.5. Assume pKa values for any newly generated a-amino and a-carboxyl groups are 9.5 and 2.2 respectively)

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