The enzyme gallate decarboxylase (EC ) catalyzes the chemical reaction

3,4,5-trihydroxybenzoate ⇌ {\displaystyle \rightleftharpoons } pyrogallol + 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 3,4,5-trihydroxybenzoate carboxy-lyase (pyrogallol-forming). Other names in common use include gallic acid decarboxylase and gallate carboxy-lyase. This enzyme participates in benzoate degradation via CoA ligation.

  • Grant DJ, Patel JC (1969). "The non-oxidative decarboxylation of p-hydroxybenzoic acid, gentisic acid, protocatechuic acid and gallic acid by Klebsiella aerogenes (Aerobacter aerogenes)". Antonie van Leeuwenhoek. 35 (3): 325–43. doi:. PMID .