pyruvate dehydrogenase phosphatase catalytic subunit 1

The PDP1 gene provides instructions for making a protein called pyruvate dehydrogenase phosphatase 1, which is part of a large group of proteins called the pyruvate dehydrogenase complex. The pyruvate dehydrogenase phosphatase 1 protein turns on (activates) the complex by removing a phosphate group (a cluster of oxygen and phosphorus atoms) from the complex.

The pyruvate dehydrogenase complex plays an important role in the pathways that convert the energy from food into a form that cells can use. This enzyme converts a molecule called pyruvate, which is formed from the breakdown of carbohydrates, into another molecule called acetyl-CoA. This conversion is essential to begin the series of chemical reactions that produces adenosine triphosphate (ATP), the cell's main energy source.

At least one mutation in the PDP1 gene has been identified in individuals with pyruvate dehydrogenase deficiency; mutation of the PDP1 gene is a very rare cause of this condition. Pyruvate dehydrogenase deficiency is characterized by a potentially life-threatening buildup of a chemical called lactic acid in the body (lactic acidosis), delayed development, and neurological problems.

The identified mutation removes one protein building block (amino acid) of the pyruvate dehydrogenase phosphatase 1 protein, which is thought to change its shape. The abnormal protein cannot remove the phosphate group from the pyruvate dehydrogenase complex, which reduces the activity of the complex. With decreased activity of this complex, pyruvate builds up and is converted, in another chemical reaction, to lactic acid, causing lactic acidosis. In addition, the production of cellular energy is diminished. The brain, which is especially dependent on this form of energy, is severely affected, resulting in the neurological problems associated with pyruvate dehydrogenase deficiency.

Cytogenetic Location: 8q22.1, which is the long (q) arm of chromosome 8 at position 22.1

Molecular Location: base pairs 93,916,855 to 93,926,068 on chromosome 8 (Homo sapiens Annotation Release 108, GRCh38.p7) (NCBI)

Cytogenetic Location: 8q22.1, which is the long (q) arm of chromosome 8 at position 22.1
  • PDH
  • PDP
  • PDP 1
  • PDPC
  • PDPC 1
  • PPM2C
  • protein phosphatase 2C, magnesium-dependent, catalytic subunit
  • pyruvate dehydrogenase (Lipoamide) phosphatase-phosphatase
  • pyruvate dehydrogenase [acetyl-transferring]]-phosphatase 1, mitochondrial
  • pyruvate dehyrogenase phosphatase catalytic subunit 1