UDP-galacturonate Decarboxylase

In enzymology, an UDP-galacturonate decarboxylase (EC 4.1.1.67) is an enzyme that catalyzes the chemical reaction

UDP-D-galacturonate UDP-L-arabinose + CO₂

Hence, this enzyme has one substrate, UDP-D-galacturonate, and two products, UDP-L-arabinose and CO₂.

This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is UDP-D-galacturonate carboxy-lyase (UDP-L-arabinose-forming). Other names in common use include UDP-galacturonic acid decarboxylase, UDPGalUA carboxy lyase, and UDP-D-galacturonate carboxy-lyase. This enzyme participates in nucleotide sugars metabolism.