1,5-anhydro-D-fructose dehydratase

In enzymology, a 1,5-anhydro-D-fructose dehydratase (EC number|4.2.1.111) is an enzyme that catalyzes the chemical reaction

:1,5-anhydro-D-fructose $ightleftharpoons$ 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H₂O

Hence, this enzyme has one substrate, 1,5-anhydro-D-fructose, and two products, 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose and 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 1,5-anhydro-D-fructose hydro-lyase (ascopyrone-M-forming). Other names in common use include 1,5-anhydro-D-fructose 4-dehydratase, 1,5-anhydro-D-fructose hydrolyase, 1,5-anhydro-D-arabino-hex-2-ulose dehydratase, AFDH, AF dehydratase, and 1,5-anhydro-D-fructose hydro-lyase.

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