Adrenal ferredoxin

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An Error has occurred retrieving Wikidata item for infobox Adrenal ferredoxin (also adrenodoxin (ADX), adrenodoxin, mitochondrial, hepatoredoxin, ferredoxin-1 (FDX1)) is a protein that in humans is encoded by the FDX1 gene.[1][2] In addition to the expressed gene at this chromosomal locus (11q22), there are pseudogenes located on chromosomes 20 and 21.

Function

Adrenodoxin is a small iron-sulfur protein that can accept and carry a single electron. Adrenodoxin functions as an electron transfer protein in the mitochondrial cytochrome P450 systems.[3] The first enzyme in this system is adrenodoxin reductase that carries an FAD. FAD can be reduced by two electrons donated from coenzyme NADPH.[4] These two electrons are transferred one a time to adrenodoxin. Adrenodoxin in return reduces mitochondrial cytochrome P450.[3] This particular oxidation/reduction system is involved in the synthesis of steroid hormones in steroidogenic tissues. In addition, similar systems also function in vitamin D and bile acid synthesis in the kidney and liver respectively. Adrenodoxin has been identified in a number of different tissues but all forms have been shown to be identical and are not tissue specific.[2]

References

  1. Mittal S, Zhu YZ, Vickery LE (Sep 1988). "Molecular cloning and sequence analysis of human placental ferredoxin". Arch Biochem Biophys. 264 (2): 383–91. doi:10.1016/0003-9861(88)90303-7. PMID 2969697.
  2. 2.0 2.1 "Entrez Gene: FDX1 ferredoxin 1".
  3. 3.0 3.1 Hanukoglu I, Jefcoate CR (Apr 1980). "Mitochondrial cytochrome P-450scc. Mechanism of electron transport by adrenodoxin" (PDF). The Journal of Biological Chemistry. 255 (7): 3057–61. doi:10.1016/S0021-9258(19)85851-9. PMID 6766943.
  4. Hanukoglu I (2017). "Conservation of the Enzyme-Coenzyme Interfaces in FAD and NADP Binding Adrenodoxin Reductase-A Ubiquitous Enzyme". Journal of Molecular Evolution. 85 (5): 205–218. Bibcode:2017JMolE..85..205H. doi:10.1007/s00239-017-9821-9. PMID 29177972. S2CID 7120148.

Further reading

External links