Pyruvate dehydrogenase phosphatase deficiency: orphan disease or an under-diagnosed condition?
Pyruvate dehydrogenase phosphatase (PDP) is an enzyme which regulates the activity of the pyruvate dehydrogenase complex (PDHc). In the past, PDHc deficiency has been attributed to mutations in the complex itself and the regulatory enzymes have not been considered. We have recently reported the first mutation in PDP1, one of the two isoforms of PDP, which results in severe exercise intolerance and mild developmental delay in patients. This novel process of aberrant pyruvate metabolism opens up a new avenue for investigation into PDHc deficiency, that has hitherto been underappreciated.
Metabolism Research Programme, Research Institute, The Hospital for Sick Children, 555 University Avenue, Toronto, Ont., Canada M5G 1X8.
M C
MC
Maj
J M
JM
Cameron
B H
BH
Robinson
D006801:Humans; D007527:Isoenzymes / Q000378:metabolism / Q000502:physiology; D009154:Mutation; D010641:Phenotype; D011494:Protein Kinases / Q000502:physiology; D017346:Protein Serine-Threonine Kinases; D011769:Pyruvate Dehydrogenase (Lipoamide)-Phosphatase / Q000172:deficiency* / Q000235:genetics / Q000378:metabolism; D000081382:Pyruvate Dehydrogenase Acetyl-Transferring Kinase; D035583:Rare Diseases / Q000175:diagnosis* / Q000235:genetics / Q000378:metabolism
D007527:Isoenzymes; D000081382:Pyruvate Dehydrogenase Acetyl-Transferring Kinase; D011494:Protein Kinases; D017346:Protein Serine-Threonine Kinases; D011769:Pyruvate Dehydrogenase (Lipoamide)-Phosphatase