Phosphopantothenoylcysteine decarboxylase


In enzymology, a phosphopantothenoylcysteine decarboxylase is an enzyme that catalyzes the chemical reaction
Hence, this enzyme has one substrate, N--L-cysteine, and two products, pantotheine 4'-phosphate and CO2.
This enzyme belongs to the family of lyases, to be specific the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is N--L-cysteine carboxy-lyase . Other names in common use include 4-phosphopantotheoylcysteine decarboxylase, 4-phosphopantothenoyl-L-cysteine decarboxylase, PPC-decarboxylase, and N--L-cysteine carboxy-lyase. This enzyme participates in coenzyme A biosynthesis from pantothenic acid.

Structural studies

As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes,, and.