ID   3.1.1.57
DE   2-pyrone-4,6-dicarboxylate lactonase.
AN   2-pyrone-4,6-dicarboxylate hydrolase.
AN   2-pyrone-4,6-dicarboxylate lactonohydrolase.
CA   2-oxo-2H-pyran-4,6-dicarboxylate + H2O = (1E)-4-oxobut-1-ene-1,2,4-
CA   tricarboxylate + H(+).
CC   -!- The product is most likely the keto-form of 4-oxalmesaconate (shown).
CC   -!- It can be converted to the enol-form, 4-hydroxybuta-1,3-diene-1,2,4-
CC       trioate, either spontaneously or by EC 5.3.2.8.
DR   Q93PS7, LIGI_COMTE ;  O87170, LIGI_SPHSK ;
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