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ETFB gene

electron transfer flavoprotein subunit beta

Normal Function

The ETFB gene provides instructions for making one part (the beta subunit) of an enzyme called electron transfer flavoprotein. This enzyme is normally active in the mitochondria, the energy-producing centers in cells. Electron transfer flavoprotein is involved in the process by which fats and proteins are broken down to produce energy.

Health Conditions Related to Genetic Changes

Glutaric acidemia type II

Some mutations in the ETFB gene prevent the production of the electron transfer flavoprotein enzyme. Other mutations result in the production of a defective enzyme that cannot fulfill its role in the series of reactions (metabolic pathways) that break down fats and proteins. This enzyme deficiency allows these nutrients, as well as compounds created as the nutrients are partially broken down, to build up to abnormal levels, especially when the body is under stress. Toxic products of incomplete metabolism damage cells in many body systems, resulting in the signs and symptoms of glutaric acidemia type II.

More About This Health Condition

Other Names for This Gene

  • electron transfer flavoprotein beta subunit
  • electron transfer flavoprotein, beta polypeptide
  • electron-transfer-flavoprotein, beta polypeptide
  • FP585

Additional Information & Resources

Tests Listed in the Genetic Testing Registry

Scientific Articles on PubMed

Catalog of Genes and Diseases from OMIM

Gene and Variant Databases


  • Curcoy A, Olsen RK, Ribes A, Trenchs V, Vilaseca MA, Campistol J, Osorio JH, Andresen BS, Gregersen N. Late-onset form of beta-electron transfer flavoprotein deficiency. Mol Genet Metab. 2003 Apr;78(4):247-9. doi: 10.1016/s1096-7192(03)00024-6. Citation on PubMed
  • Olsen RK, Andresen BS, Christensen E, Bross P, Skovby F, Gregersen N. Clear relationship between ETF/ETFDH genotype and phenotype in patients with multiple acyl-CoA dehydrogenation deficiency. Hum Mutat. 2003 Jul;22(1):12-23. doi: 10.1002/humu.10226. Citation on PubMed
  • Olsen RK, Andresen BS, Christensen E, Mandel H, Skovby F, Nielsen JP, Knudsen I, Vianey-Saban C, Simonsen H, Gregersen N. DNA-based prenatal diagnosis for severe and variant forms of multiple acyl-CoA dehydrogenation deficiency. Prenat Diagn. 2005 Jan;25(1):60-4. doi: 10.1002/pd.983. Citation on PubMed
  • Schiff M, Froissart R, Olsen RK, Acquaviva C, Vianey-Saban C. Electron transfer flavoprotein deficiency: functional and molecular aspects. Mol Genet Metab. 2006 Jun;88(2):153-8. doi: 10.1016/j.ymgme.2006.01.009. Epub 2006 Feb 28. Citation on PubMed
  • White RA, Dowler LL, Angeloni SV, Koeller DM. Assignment of Etfdh, Etfb, and Etfa to chromosomes 3, 7, and 13: the mouse homologs of genes responsible for glutaric acidemia type II in human. Genomics. 1996 Apr 1;33(1):131-4. doi: 10.1006/geno.1996.0170. Citation on PubMed
  • Whitfield J, Hurst D, Bennett MJ, Sherwood WG, Hogg R, Gonsoulin W. Fetal polycystic kidney disease associated with glutaric aciduria type II: an inborn error of energy metabolism. Am J Perinatol. 1996 Apr;13(3):131-4. doi: 10.1055/s-2007-994309. Citation on PubMed

The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.