a-Ketoglutarate plays a central role in the biosynthesis of several amino acids. Arrange the reactions to outline the net synthesis of a-ketoglutarate from pyruvate. Your proposed sequence must not include reactions that result in the net consumption of other citric acid cycle intermediates. Pyruvate + ATP + CO, + H,0 → oxaloacetate + ADP + P; + H+ a-Ketoglutarate + CoA + NAD+ succinyl-CoA + CO,+NADH + H+ Pyruvate + CoA + NAD+ acetyl-CoA + CO,+NADH + H+ Oxaloacetate + acetyl-CoA → citrate + CoA Oxaloacetate + NADH + H+ → malate + NAD+ Citrate → isocitrate Isocitrate + NAD+ a-ketoglutarate + CO,+NADH + H*

Biochemistry
6th Edition
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Reginald H. Garrett, Charles M. Grisham
Chapter25: Nitrogen Acquisition And Amino Acid Metabolism
Section: Chapter Questions
Problem 22P
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a-Ketoglutarate plays a central role in the biosynthesis of several amino acids. Arrange the reactions to outline the net synthesis
of a-ketoglutarate from pyruvate. Your proposed sequence must not include reactions that result in the net consumption of other
citric acid cycle intermediates.
Pyruvate + ATP + CO, + H,0
→ oxaloacetate + ADP + P; + H+
a-Ketoglutarate + CoA + NAD+
→ succinyl-CoA + CO,+NADH + H+
Pyruvate + CoA + NAD+
acetyl-CoA + CO,+NADH + H+
Oxaloacetate + acetyl-CoA
→ citrate + CoA
Oxaloacetate + NADH + H+
malate + NAD+
Citrate
→ isocitrate
Isocitrate + NAD+
a-ketoglutarate + CO,+NADH + H*
2.
Transcribed Image Text:a-Ketoglutarate plays a central role in the biosynthesis of several amino acids. Arrange the reactions to outline the net synthesis of a-ketoglutarate from pyruvate. Your proposed sequence must not include reactions that result in the net consumption of other citric acid cycle intermediates. Pyruvate + ATP + CO, + H,0 → oxaloacetate + ADP + P; + H+ a-Ketoglutarate + CoA + NAD+ → succinyl-CoA + CO,+NADH + H+ Pyruvate + CoA + NAD+ acetyl-CoA + CO,+NADH + H+ Oxaloacetate + acetyl-CoA → citrate + CoA Oxaloacetate + NADH + H+ malate + NAD+ Citrate → isocitrate Isocitrate + NAD+ a-ketoglutarate + CO,+NADH + H* 2.
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