Members of this family appear in an operon for the degradation of propionyl-CoA via 2-methylcitrate. This family is homologous to aconitases A and B and appears to act the part as 2-methylisocitrate dehydratase, the enzyme after PrpD and before PrpB. In Escherichia coli, which lacks a member of this family, 2-methylisocitrate dehydratase activity was traced to aconitase B (TIGR00117) ().
Jiyao W et al.(2023). "The conserved domain database in 2023.",