Muconolactone Delta-isomerase

In enzymology, a muconolactone Delta-isomerase (EC 5.3.3.4) is an enzyme that catalyzes the chemical reaction

(S)-5-oxo-2,5-dihydrofuran-2-acetate 5-oxo-4,5-dihydrofuran-2-acetate

Hence, this enzyme has one substrate, (S)-5-oxo-2,5-dihydrofuran-2-acetate, and one product, 5-oxo-4,5-dihydrofuran-2-acetate.

This enzyme belongs to the family of isomerases, specifically those intramolecular oxidoreductases transposing C=C bonds. The systematic name of this enzyme class is 5-oxo-4,5-dihydrofuran-2-acetate Delta3-Delta2-isomerase. This enzyme is also called muconolactone isomerase. This enzyme participates in benzoate degradation via hydroxylation.