Regulation of pyruvate dehydrogenase (PDH) activity in human skeletal muscle during exercise.
Pyruvate dehydrogenase is a mitochondrial multienzyme complex that catalyzes the conversion of pyruvate to acetyl-coenzyme A and regulates the entry of carbohydrate into the tricarboxylic acid cycle for oxidation. During exercise, pyruvate dehydrogenase activation in human skeletal muscle is proportional to the relative aerobic power output (percent VO2max) and is regulated by increases in Ca2+, free ADP, and pyruvate concentrations.
Spriet
Lawrence L
LL
Department of Human Biology and Nutritional Sciences, University of Guelph, Ontario, Canada. lspriet@uoguelph.ca
Heigenhauser
George J F
GJ
D000105:Acetyl Coenzyme A / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D050260:Carbohydrate Metabolism; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008931:Mitochondria, Muscle / Q000378:metabolism*; D018482:Muscle, Skeletal / Q000201:enzymology*; D010100:Oxygen / Q000378:metabolism; D010766:Phosphorylation; D011768:Pyruvate Dehydrogenase Complex / Q000378:metabolism*
D011768:Pyruvate Dehydrogenase Complex; D000105:Acetyl Coenzyme A; D000255:Adenosine Triphosphate; D010100:Oxygen