Enables aconitate decarboxylase activity. Involved in several processes, including cellular response to cytokine stimulus; negative regulation of defense response; and negative regulation of signal transduction. Acts upstream of or within response to lipopolysaccharide. Located in mitochondrion. Orthologous to human ACOD1 (aconitate decarboxylase 1). [provided by Alliance of Genome Resources, Apr 2022]