Homocitric acid

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Homocitric acid
Homocitric acid.png
Names
IUPAC name
2-Hydroxybutane-1,2,4-tricarboxylic acid
Other names
Homocitric acid
Homocitrate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
KEGG
Properties
C7H10O7
Molar mass 206.15 g·mol−1
Appearance Colorless solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Homocitric acid is an organic compound with the formula HOC(CO2H)(CH2CO2H)(C2H4CO2H). This tricarboxylic acid occurs naturally as a component of the iron-molybdenum cofactor of certain nitrogenase proteins.[1] Biochemists often refer to this cofactor as homocitrate, which is the conjugate bases that predominate in neutral aqueous solutions of this species.

The molecule is related to citric acid by the addition of one methylene unit, hence the prefix "homo." Unlike citric acid, homocitric acid is chiral. The acid exists in equilibrium with the lactone.

Homocitrate2.png

See also[edit]

References[edit]

  1. ^ Rees, Douglas C. (2002). "Great Metalloclusters in Enzymology". Annual Review of Biochemistry. 71: 221–46. doi:10.1146/annurev.biochem.71.110601.135406. PMID 12045096.