The enzyme 2-methylcitrate dehydratase (EC 4.2.1.79) catalyzes the chemical reaction

(2S,3S)-2-hydroxybutane-1,2,3-tricarboxylate (Z)-but-2-ene-1,2,3-tricarboxylate + H₂O

This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is (2S,3S)-2-hydroxybutane-1,2,3-tricarboxylate hydro-lyase [(Z)-but-2-ene-1,2,3-tricarboxylate-forming]. Other names in common use include 2-methylcitrate hydro-lyase, PrpD, and 2-hydroxybutane-1,2,3-tricarboxylate hydro-lyase. This enzyme participates in propanoate metabolism.

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1SZQ.

• Aoki H, Tabuchi T (1981). "Purification and properties of 2-methylcitrate dehydratase from Yarrowia lipolytica". Agric. Biol. Chem. 45 (12): 2831–2837. doi:10.1271/bbb1961.45.2831.
• Brock M, Maerker C, Schutz A, Volker U, Buckel W (2002). "Oxidation of propionate to pyruvate in Escherichia coli. Involvement of methylcitrate dehydratase and aconitase". Eur. J. Biochem. 269 (24): 6184–94. doi:10.1046/j.1432-1033.2002.03336.x. PMID 12473114.