Reactome: A Curated Pathway Database

Regulation of pyruvate dehydrogenase (PDH) complex (R-HSA-204174) [Homo sapiens]


The mitochondrial pyruvate dehydrogenase (PDH) complex catalyzes the oxidative decarboxylation of pyruvate, linking glycolysis to the tricarboxylic acid cycle and fatty acid synthesis. PDH inactivation is crucial for glucose conservation when glucose is scarce, while adequate PDH activity is required to allow both ATP and fatty acid production from glucose. The mechanisms that control human PDH activity include its phosphorylation (inactivation) by pyruvate dehydrogenase kinases (PDK 1-4) and its dephosphorylation (activation, reactivation) by pyruvate dehydrogenase phosphate phosphatases (PDP 1 and 2). Isoform-specific differences in kinetic parameters, regulation, and phosphorylation site specificity of the PDKs introduce variations in the regulation of PDC activity in differing endocrine and metabolic states (Sugden and Holness 2003).

Additional Information
Compartment mitochondrial matrix
GO Biological Process regulation of acetyl-CoA biosynthetic process from pyruvate (0010510)
Literature References
pubMedId Title Journal Year
12676647 Recent advances in mechanisms regulating glucose oxidation at the level of the pyruvate dehydrogenase complex by PDKs Am J Physiol Endocrinol Metab 2003