ENTRY       EC 4.2.1.71
NAME        Acetylenecarboxylate hydratase
            Acetylenemonocarboxylate hydratase
            Alkynoate hydratase
CLASS       Lyases
            Carbon-oxygen lyases
            Hydro-lyases
SYSNAME     3-Hydroxypropenoate hydro-lyase
REACTION    3-Hydroxypropenoate = Propynoate + H2O
SUBSTRATE   3-Hydroxypropenoate
            Acetoacetate
PRODUCT     Propynoate
            H2O
            3-Gutynoate
COMMENT     The reaction is effectively irreversible, favouring the tautomers
            of malonic semialdehyde. Also acts on 3-butynoate (in the reverse
            direction), forming acetoacetate.
PATHWAY     PATH: MAP00640  Propanoate metabolism
            PATH: MAP00650  Butanoate metabolism
DBLINKS     University of Geneva ENZYME DATA BANK: 4.2.1.71
            WIT (What Is There) Metabolic Reconstruction: 4.2.1.71
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