Aliases for PDHX Gene
External Ids for PDHX Gene
Previous GeneCards Identifiers for PDHX Gene
The pyruvate dehydrogenase (PDH) complex is located in the mitochondrial matrix and catalyzes the conversion of pyruvate to acetyl coenzyme A. The PDH complex thereby links glycolysis to Krebs cycle. The PDH complex contains three catalytic subunits, E1, E2, and E3, two regulatory subunits, E1 kinase and E1 phosphatase, and a non-catalytic subunit, E3 binding protein (E3BP). This gene encodes the E3 binding protein subunit; also known as component X of the pyruvate dehydrogenase complex. This protein tethers E3 dimers to the E2 core of the PDH complex. Defects in this gene are a cause of pyruvate dehydrogenase deficiency which results in neurological dysfunction and lactic acidosis in infancy and early childhood. This protein is also a minor antigen for antimitochondrial antibodies. These autoantibodies are present in nearly 95% of patients with the autoimmune liver disease primary biliary cirrhosis (PBC). In PBC, activated T lymphocytes attack and destroy epithelial cells in the bile duct where this protein is abnormally distributed and overexpressed. PBC eventually leads to cirrhosis and liver failure. Alternative splicing results in multiple transcript variants encoding distinct isoforms.[provided by RefSeq, Oct 2009]
GeneCards Summary for PDHX Gene
PDHX (Pyruvate Dehydrogenase Complex Component X) is a Protein Coding gene. Diseases associated with PDHX include Pyruvate Dehydrogenase E3-Binding Protein Deficiency and Pyruvate Dehydrogenase E1-Alpha Deficiency. Among its related pathways are Pyruvate metabolism and Citric Acid (TCA) cycle and Signaling by GPCR. Gene Ontology (GO) annotations related to this gene include transferase activity, transferring acyl groups. An important paralog of this gene is DLAT.
UniProtKB/Swiss-Prot Summary for PDHX Gene
Required for anchoring dihydrolipoamide dehydrogenase (E3) to the dihydrolipoamide transacetylase (E2) core of the pyruvate dehydrogenase complexes of eukaryotes. This specific binding is essential for a functional PDH complex.