|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions|
|Reactions Classified By Substrate → Small-Molecule Reactions|
EC Number: 188.8.131.52
Enzymes and Genes:
|Escherichia coli K-12 substr. MG1655 :||multicopper oxidase with role in copper homeostasis
|Homo sapiens :||ceruloplasmin
Reaction Locations: periplasmic space (sensu Gram-negative Bacteria), cytosol
The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the direction in which it was curated.
Most BioCyc compounds have been protonated to a reference pH value of 7.3, and some reactions have been computationally balanced for hydrogen by adding free protons. Please see the PGDB Concepts Guide for more information.
Mass balance status: Balanced.
Enzyme Commission Primary Name: ferroxidase
Enzyme Commission Synonyms: ceruloplasmin, caeruloplasmin, ferroxidase I, iron oxidase, iron(II):oxygen oxidoreductase, ferro:O2 oxidoreductase, iron II:oxygen oxidoreductase, hephaestin, HEPH
Standard Gibbs Free Energy (ΔrG'° in kcal/mol): -13.166946 [Latendresse13]
Enzyme Commission Summary:
The enzyme in blood plasma (ceruloplasmin) belongs to the family of multicopper oxidases. In humans it accounts for 95% of plasma copper. It oxidizes Fe(II) to Fe(III), which allows the subsequent incorporation of the latter into proteins such as apotransferrin and lactoferrin. An enzyme from iron oxidizing bacterium strain TI-1 contains heme a.
Chen04c: Chen H, Attieh ZK, Su T, Syed BA, Gao H, Alaeddine RM, Fox TC, Usta J, Naylor CE, Evans RW, McKie AT, Anderson GJ, Vulpe CD (2004). "Hephaestin is a ferroxidase that maintains partial activity in sex-linked anemia mice." Blood 103(10);3933-9. PMID: 14751926
Osaki67: Osaki S, Walaas O (1967). "Kinetic studies of ferrous ion oxidation with crystalline human ferroxidase. II. Rate constants at various steps and formation of a possible enzyme-substrate complex." J Biol Chem 242(11);2653-7. PMID: 6027241
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