Pyruvate dehydrogenase E1 component subunit alpha, somatic (PDHA1)

Pyruvate dehydrogenase E1 component subunit alpha, somatic (PDHA1) is the primary catalytic subunit of the E1 enzyme within the mitochondrial pyruvate dehydrogenase complex (PDC) (UniProt, 2024). It plays a pivotal role in cellular energy metabolism by catalyzing the oxidative decarboxylation of pyruvate to acetyl-CoA, effectively linking glycolysis to the tricarboxylic acid (TCA) cycle (MedlinePlus, 2024). This step is crucial for aerobic respiration and the generation of ATP, particularly in tissues with high energy demands like the brain (Wikipedia, 2024). Genetic mutations in PDHA1 are the leading cause of pyruvate dehydrogenase deficiency, which manifests as lactic acidosis and severe neurological disorders such as Leigh syndrome (NIH, 2024). In the context of cancer, PDHA1 activity is frequently suppressed through phosphorylation by pyruvate dehydrogenase kinases (PDKs), facilitating the Warburg effect and tumor progression (Frontiers in Oncology, 2022). Therapeutic strategies include the use of dichloroacetate to reactivate the enzyme by inhibiting PDKs, or the use of complex inhibitors like devimistat to exploit metabolic vulnerabilities in malignant cells (PubMed, 2022).

Other names

PDHA1PDHAPDHCE1APDHE1-A type IPHE1APyruvate dehydrogenase (lipoamide) alpha 1pyruvate dehydrogenase alpha 1pyruvate dehydrogenase complex E1-alpha polypeptide 1

Activation of the pyruvate dehydrogenase complex through inhibition of pyruvate dehydrogenase kinases (PDKs) or cofactor supplementation; inhibition of the complex to disrupt mitochondrial metabolism in cancer cells (PubMed, 2022; StatPearls, 2023).