Question

Write the chemical equation showing the initial reactions when pyruvate enters mitochondrial matrix.​

Answer 1

Answer:

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Pyruvate dehydrogenase complex (PDC) is a complex of three enzymes that converts pyruvate into acetyl-CoA by a process called pyruvate decarboxylation. Acetyl-CoA may then be used in the citric acid cycle to carry out cellular respiration, and this complex links the glycolysis metabolic pathway to the citric acid cycle. Pyruvate decarboxylation is also known as the "pyruvate dehydrogenase reaction" because it also involves the oxidation of pyruvate.[1]

This multi-enzyme complex is related structurally and functionally to the oxoglutarate dehydrogenase and branched-chain oxo-acid dehydrogenase multi-enzyme complexes.

Reaction

Structure Edit

Enzymes Abbrev. Cofactors # subunits prokaryotes # subunits eukaryotes

pyruvate dehydrogenase

(EC 1.2.4.1) E1 TPP (thiamine pyrophosphate) 24 30

dihydrolipoyl transacetylase

(EC 2.3.1.12) E2 lipoate

coenzyme A 24 60

dihydrolipoyl dehydrogenase

(EC 1.8.1.4) E3 FAD

NAD+ 12 12

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