IUBMB Enzyme Nomenclature


Accepted name: phosphonopyruvate decarboxylase

Reaction: 3-phosphonopyruvate = 2-phosphonoacetaldehyde + CO2

For diagram of reaction click here.

Other name(s): 3-phosphonopyruvate carboxy-lyase

Systematic name: 3-phosphonopyruvate carboxy-lyase (2-phosphonoacetaldehyde-forming)

Comments: The enzyme catalyses a step in the biosynthetic pathway of 2-aminoethylphosphonate, a component of the capsular polysaccharide complex of Bacteroides fragilis. Requires thiamine diphosphate and Mg2+ as cofactors. The enzyme is activated by the divalent cations Mg2+, Ca2+ and Mn2+. Pyruvate and sulfopyruvate can also act as substrates, but more slowly. This enzyme drives the reaction catalysed by EC, phosphoenolpyruvate mutase, in the thermodynamically unfavourable direction of 3-phosphonopyruvate formation [2]. It is the initial step in all of the major biosynthetic pathways of phosphonate natural products [3].

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 151662-34-9


1. Zhang, G., Dai, J., Lu, Z. and Dunaway-Mariano, D. The phosphonopyruvate decarboxylase from Bacteroides fragilis. J. Biol. Chem. 278 (2003) 41302-41308. [PMID: 12904299]

2. Seidel, H.M. and Knowles, J.R. Interaction of inhibitors with phosphoenolpyruvate mutase: implications for the reaction mechanism and the nature of the active site. Biochemistry 33 (1994) 5641-5646. [PMID: 8180189]

3. Nakashita, H., Watanabe, K., Hara, O., Hidaka, T. and Seto, H. Studies on the biosynthesis of bialaphos. Biochemical mechanism of C-P bond formation: discovery of phosphonopyruvate decarboxylase which catalyzes the formation of phosphonoacetaldehyde from phosphonopyruvate. J. Antibiot. (Tokyo) 50 (1997) 212-219. [PMID: 9127192]

[EC created 2005]

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