Medical Dictionary


noun acon·i·tase \ə-ˈkän-ə-ˌtās\

Medical Definition of aconitase

  1. :  an enzyme occurring in many animal and plant tissues that accelerates the conversion of citric acid first into aconitic acid and then into isocitric acid during the Krebs cycle Aconitase also functions in regulating levels of iron in the cell by inhibiting the formation of ferritin. It has an active site of iron and sulfur. … recent studies have shown that aconitase is an early target of free radical damage in stressed cells because of the presence of an iron-sulfur cluster in the enzyme.—Kyra J. Cowan, in Functional Metabolism: Regulation and Adaptation, 2004

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