Here's a breakdown of the reaction:
* Citrate, a six-carbon molecule, undergoes dehydration to form cis-aconitate, a five-carbon molecule with a double bond.
* cis-aconitate is then hydrated to form isocitrate, another six-carbon molecule.
This reaction is reversible and can proceed in either direction depending on the concentration of the reactants and products.
Why is this reaction important?
The isomerization of citrate to isocitrate is crucial because it sets up the next step in the citric acid cycle: the oxidation of isocitrate to alpha-ketoglutarate. This oxidation step is a key energy-generating reaction in the cycle.
Additional information:
* Aconitase is a metalloenzyme that requires iron-sulfur clusters for its activity.
* The reaction is stereospecific, meaning that only the cis isomer of aconitate is formed.
* The enzyme is regulated by the concentration of citrate and other metabolites.
