Phosphonopyruvate decarboxylase

Phosphonopyruvate decarboxylase is an enzyme (EC 4.1.1.82) that catalyzes a decarboxylation reaction in phosphonate biosynthesis, specifically converting 3-phosphonopyruvate to 2-phosphonoacetaldehyde and carbon dioxide[7][10][6]. It is a member of the lyase family, within the carboxy-lyase subclass, and is dependent on thiamine pyrophosphate (TPP) and metal ions such as Mg2+ for activity[1][2][3][8]. The enzyme plays a crucial role in the biosynthesis of naturally occurring organophosphonates—such as 2-aminoethylphosphonate, present in the capsular polysaccharide of *Bacteroides fragilis*[2][6][10]. While it is mechanistically and structurally well-characterized, including crystal structure details for various homologs[3][8], it is not a major therapeutic drug target, nor is it associated with direct disease roles, biomarkers, or safety concerns in clinical therapeutics as currently known. Experimentally, mechanism-based inhibitors such as phosphonodifluoropyruvate have been shown to interact with and inhibit the enzyme[5].

Other names

3-phosphonopyruvate carboxy-lyase3-phosphonopyruvate carboxy-lyase (2-phosphonoacetaldehyde-forming)EC 4.1.1.82

ThDP (Thiamine diphosphate or TPP)-dependent irreversible decarboxylation; inhibition by substrate analogues acting as mechanism-based inactivators