This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is cis-aconitate carboxy-lyase (itaconate-forming). Other names in common use include cis-aconitic decarboxylase, CAD, cis-aconitate carboxy-lyase, and cis-aconitate carboxy-lyase. This enzyme participates in c5-branched dibasic acid metabolism.
BENTLEY R, THIESSEN CP (1957). "Biosynthesis of itaconic acid in Aspergillus terreus. III. The properties and reaction mechanism of cis-aconitic acid decarboxylase". J. Biol. Chem. 226 (2): 703–20. PMID13438855.