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Pathway Description
Pyruvate Decarboxylase E1 Component Deficiency (PDHE1 Deficiency)
Homo sapiens
Disease Pathway
Pyruvate Decarboxylase E1 Component Deficiency is caused by a defect in the PDHA1 gene which codes for mitochondrial pyruvate dehydrogenase E1 component subunit alpha, somatic form. This is a homotetrameric enzyme that catalyses the decarboxylation of pyruvic acid to acetaldehyde and carbon dioxide. A defect in this enzyme results in accumulation of lacate and pyruvate. Symptoms and signs include severe lactic acidosis in the newborns that usually leading to death, hypotonic, lethargic, seizures, mental retardation and spasticity.
References
Pyruvate Decarboxylase E1 Component Deficiency (PDHE1 Deficiency) References
Engelke, U., van der Graaf, M., Heerschap, A., Hoenderop, S., Moolenaar, S., Morava, E., Wevers, R. Handbook of 1H-NMR spectroscopy in inborn errors of metabolism: body fluid NMR spectroscopy and in vivo MR spectroscopy (2nd ed) (2007) p.86 Heilbronn: SPS Verlagsgesellschaft
Bindoff LA, Birch-Machin MA, Farnsworth L, Gardner-Medwin D, Lindsay JG, Turnbull DM: Familial intermittent ataxia due to a defect of the E1 component of pyruvate dehydrogenase complex. J Neurol Sci. 1989 Nov;93(2-3):311-8. doi: 10.1016/0022-510x(89)90200-1.
Pubmed: 2592988
Birch-Machin MA, Shepherd IM, Solomon M, Yeaman SJ, Gardner-Medwin D, Sherratt HS, Lindsay JG, Aynsley-Green A, Turnbull DM: Fatal lactic acidosis due to deficiency of E1 component of the pyruvate dehydrogenase complex. J Inherit Metab Dis. 1988;11(2):207-17. doi: 10.1007/BF01799876.
Pubmed: 3139934
Brown GK, Otero LJ, LeGris M, Brown RM: Pyruvate dehydrogenase deficiency. J Med Genet. 1994 Nov;31(11):875-9. doi: 10.1136/jmg.31.11.875.
Pubmed: 7853374
Brown RM, Head RA, Boubriak II, Leonard JV, Thomas NH, Brown GK: Mutations in the gene for the E1beta subunit: a novel cause of pyruvate dehydrogenase deficiency. Hum Genet. 2004 Jul;115(2):123-7. doi: 10.1007/s00439-004-1124-8. Epub 2004 May 11.
Pubmed: 15138885
Lehninger, A.L. Lehninger principles of biochemistry (4th ed.) (2005). New York: W.H Freeman.
Salway, J.G. Metabolism at a glance (3rd ed.) (2004). Alden, Mass.: Blackwell Pub.
Gray LR, Tompkins SC, Taylor EB: Regulation of pyruvate metabolism and human disease. Cell Mol Life Sci. 2014 Jul;71(14):2577-604. doi: 10.1007/s00018-013-1539-2. Epub 2013 Dec 21.
Pubmed: 24363178
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