Construction of a Plasmid for High Level Expression of Escherichia coli Phospho-enolpyruvate Carboxylase

Abstract

The minimum size DNA fragment (3011 bp) containing the entire phosphoenolpyruvate carboxylase [EC 4.1.1.31] gene of E. coli was cloned into a modified plasmid vector of high copy-number. The gene expression was directed by its own promoter and the content of the enzyme reached about 30% of total soluble protein of the transformed cells.