Formation of phosphoenolpyruvate, which is the primary acceptor of CO(2) in C4 and some Crassulacean acid metabolism plants. ATP + phosphate + pyruvate = AMP + diphosphate + H(+) + phosphoenolpyruvate Expressed in leaves, roots and stems. PubMed:1668653 shows the existence of a second gene coding for both cytoplasmic and chloroplastic isoforms of PPDK. Belongs to the PEP-utilizing enzyme family.