Cloning of pediocin PA-1 and its immunity genes from Pediococcus acidilactici K7 using pAMJ shuttle vector into Lactococcus lactis MG1363

Abstract

The matured pediocin PA-1 encoding gene, pedA and its immunity counterpart, pedB from Pediococcus acidilactici K7 were cloned by PCR technique and ligated into the E. coli-lactic shuttle, protein expression vector pAMJ2008. The recombinant pAMJAB was constructed and sequenced to confirm the intactness of reading frame of the deduced pediocin PA-1 fusion protein. Lactococcus lactis MG1363 was electroporated with the plasmids and the transformation efficiency of ~ 2-3  10³ g⁻¹ was observed. This was further confirmed by plasmid DNA isolation and analysis.