1. Consider the reaction:succinyl-CoA succinateH3CCH₂a. What kind of reaction is being performed here?H³CCH₂b. What enzyme performs this reaction?S-COAc. What cofactors, if any, are required for this reaction?

Acetyl CoA produced from fatty acid oxidation in the hepatic cells has two possible fates: enter…

Answered: 1. Consider the reaction: succinyl-CoA…

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter23: Fatty Acid Catabolism

Section: Chapter Questions

Problem 21P: Using the ActiveModel for enoyl-CoA dehydratase, give an example of a case in which conserved...

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2. a) Outline the general mechanism of a coenzyme B12-dependent enzyme which catalyzes the following reaction. HO H R-C-C-H ĤIÓN - H₂O HIC-H R-C-C O= H b) When R is CH3, what would the name of the enzyme be, and what would be the full EC number? Justify the first number of the EC number.
1. (a) write, using structural formulas, the sequence of TCA cycle intermediates. Indicate the position of the 14C atom in each intermediate. Do not name enzymes or cofactors catalyzing the reactions. Starting with citrate formed immediately after reaction of [2-14C]acetyl-SCOA with OAA,
Which of the following statements is true about the chymotrypsin reaction? 1. The catalytic triad at the active site is formed by three residues: His, Gly, and Ser 2. When the substrate is p-Nitrophenylacetate, the rate-limiting step is the release of p-Nitrophenolate. 3. During the reaction, LBHB forms when the proton is donated to His from Ser or water. 4. The chymotrypsin reaction involves “only” specific acid-base catalysis 5. The “oxyanion hole” is formed by the amide nitrogens of Ser and Glu
Fatty acids are converted to their coenzyme A esters in a reversible reaction catalyzed by acyl-CoA synthetase: R-COO +ATP +COA R-C-COA +AMP + PPi a) The reaction involves two steps the first of which forms an enzyme-bound intermediate identified as the mixed anhydride of the fatty acid and AMP: R-C-O-P-O-nibose-adenine Write two chemical equations coresponding to the two steps of the reaction catalyzed by the synthetase. b) The acyl-CoA synthetase reaction as written above is readily reversible. How might the reaction be made to favor formation of fatty acyl-CoA? Write within the box. Anything outside the box will not be graded. From the
Beginning with the 1st tetrahedral intermediate, show the complete steps in chymotrypsin mechanism that occurs to form the 2nd chymotrypsin intermediate in the chymotrypsin active site. The substrate for chymotrypsin to be used is Ala-Tyr-Gly. Further, name the amino acid(s) that would be released as a result of the reactions you'd illustrated above.
There is another class of aldolase enzymes known as Class II. These enzymes are found in fungi, algae, and some bacteria. This class differs for Class I in that these enzymes do not have a Lys residue associated with their active sites, but contain a divalent cation (usually Zn2+ or Fe2+) in the active site. Outline a possible mechanism for a Class II aldolase and explain the function of the metal ion in the reaction.
a What would be the appropriate name for an enzyme that catalyzes each of the following reactions: b H3C iOH OH NH₂ alanine ligase alanine oxidoreductase alanine isomerase alanine transferase OH H3C CH3 H3C NO₂ propanone transferase propan-2-ol hydrolase propan-2-ol oxidoreductase propan-2-ol isomerase OH H3C CH3
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
The complete oxidation of palmitoyl-CoA to carbon dioxide and water is presented by the overall equation: Palmitoyl-CoA + 23O2 + 108Pi + 108 ATP + 23H2O → CoA + 16 CO2 + 108 ATP + 23H2O Water is also produced in the reaction ADP + Pi → ATP + H2O But not included as a product in the overall equation. Why?
The lipase substrate emulsion contains 0.500 mg of olive oil per 3 mL Also, the molar mass of the olive oil is 885 g/mol. If all of the olive oil in a 3 mL reaction is "digested" by pancreatic lipase in a reaction, how many molecules of olive oil have been degraded?
If you were to determine the P/O ratio for oxidation of a-ketoglutarate, you would probably include some malonate in your reaction system. Why? Under these conditions, what P/O ratio would you expect to observe?
(i) During the Pyruvate Decarboxylase (PDC) catalysed reaction, a covalent coenzyme intermediate is formed. On the skeleton of the covalent coenzyme intermediate below draw the appropriate double bonds, charges, and electron pairs to illustrate the two resonance forms of this intermediate. Name each form in the boxes provided. HO S R' N -R HO S R' N -R

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1. Consider the reaction: succinyl-CoA succinate H3C H3C C H₂ a. What kind of reaction is being performed here? S-COA b. What enzyme performs this reaction? c. What cofactors, if any, are required for this reaction?