Reaction: phosphate + oxaloacetate = phosphoenolpyruvate + HCO3-
For diagram of reaction click here.
Other name(s): phosphopyruvate (phosphate) carboxylase; PEP carboxylase; phosphoenolpyruvic carboxylase; PEPC; PEPCase; phosphate:oxaloacetate carboxy-lyase (phosphorylating)
Systematic name: phosphate:oxaloacetate carboxy-lyase (adding phosphate, phosphoenolpyruvate-forming)
Comments: This enzyme replenishes oxaloacetate in the tricarboxylic acid cycle when operating in the reverse direction. The reaction proceeds in two steps: formation of carboxyphosphate and the enolate form of pyruvate, followed by carboxylation of the enolate and release of phosphate.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9067-77-0
References:
1. Chen, J.H. and Jones, R.F. Multiple forms of phosphoenolpyruvate carboxylase from Chlamydomonas reeinhardtii. Biochim. Biophys. Acta 214 (1970) 318-325. [PMID: 5501374]
2. Mazelis, M. and Vennesland, B. Carbon dioxide fixation into oxalacetate in higher plants. Plant Physiol. 32 (1957) 591-600. [PMID: 16655053]
3. Tovar-Mendez, A., Mujica-Jimenez, C. and Munoz-Clares, R.A. Physiological implications of the kinetics of maize leaf phosphoenolpyruvate carboxylase. Plant Physiol. 123 (2000) 149-160. [PMID: 10806233]