Chapter 23: Q3P (page 1071)
What is the product of the following reaction?
Chapter 23: Q3P (page 1071)
What is the product of the following reaction?
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Get started for freeAcetolactate synthase is another TPP-requiring enzyme. It transfers the acyl group of pyruvate to another molecule of pyruvate, forming acetolactate. This is the first step in the biosynthesis of the amino acids valine and leucine. Propose a mechanism for this reaction.
Question: How do the structures of tetrahydrofolate and aminopterin differ?
a. What acyl group does pyruvate decarboxylase transfer to a proton?
b. What acyl group does the pyruvate dehydrogenase complex transfer to coenzyme A?
c. What acyl group does transketolase transfer to ribose-5-P?
The enzyme that catalyzes the bond cleavage reaction that converts serine to glycine removes the substituent (R) bonded to the \(\alpha \)-carbon in the first step of the reaction. Starting with PLP bound to serine in an imine linkage, propose a mechanism for this reaction. (Hint:The first step involves removal of the proton from serineโs OH group.)
Question:Five coenzymes are required by -ketoglutarate dehydrogenase, the enzyme in the citric acid cycle that converts -ketoglutarate to succinyl-CoA.
a. Identify the coenzymes.
b.Propose a mechanism for the reaction.
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