Abstract
Background: The present study was aimed at cloning and expression of the major outer membrane porin (ompH) gene of P. multocida serotype B:2 P52, the strain used in vaccines against HS in India. The Porin H (OmpH) is major immunodominant outer membrane protein in the envelope of Pasteurella multocida. Methods: The gene encoding OmpH was amplified by PCR, cloned and expressed in prokaryotic expression vector. The recombinant OmpH protein was expressed as a protein with E. coli BL21 (DE3) cells transformed with recombinant plasmid pQE30-Xa-ompH. Result: The expressed protein was purified from E. coli and characterized by SDS-PAGE and western blot analysis. The fusion recombinant protein eluted had a molecular mass of about 34 kDa. The expressed recombinant protein was confirmed with western blot analysis using RGS-His antibody and anti-P. multocida serum raised against whole cell lysate.
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