Secretory expression of bovine herpesvirus type 1/5 glycoprotein E in Pichia pastoris for the differential diagnosis of vaccinated or infected cattle.

Abstract

Bovine herpesvirus (BoHV) glycoprotein E (gE) is a non-essential envelope glycoprotein and the deletion of gE has been used to develop BoHV-1 and BoHV-5 differential vaccine strains. The DIVA (Differentiation of Infected from Vaccinated Animals) strategy, using marker vaccines based on gE-negative BoHV strains, allows the identification of vaccinated or infected animals in immunoassays designed to detect anti-gE antibodies. In this study a codon optimized synthetic sequence of gE containing highly conserved regions from BoHV-1 and BoHV-5 was expressed in Pichia pastoris. Following expression, the recombinant gE (rgE) was secreted and purified from the culture medium. The rgE was identified by Western blotting (WB) using sera from cattle naturally infected with BoHV-1 and/or BoHV-5, or sera from bovines experimentally infected with wild-type BoHV-5. Sera collected from cattle vaccinated with a BoHV-5 gI/gE/US9¯ marker vaccine failed to recognise rgE. Expression of rgE, based on a sequence containing highly conserved regions from BoHV-1 and BoHV-5, in P. pastoris enabled the production of large quantities of rgE suitable for use in immunoassays for the differentiation vaccinated or infected cattle.

DOI: 10.1016/j.pep.2016.09.018

Cite this paper

@article{Siedler2017SecretoryEO, title={Secretory expression of bovine herpesvirus type 1/5 glycoprotein E in Pichia pastoris for the differential diagnosis of vaccinated or infected cattle.}, author={Bianca Sica Siedler and Barbara Couto Roloff and Gizele Lima de S{\'a} and Alessandra Neis and Fabr{\'i}cio Rochedo Conceiç{\~a}o and Daiane Drawanz Hartwig and Sibele Borsuk and Odir Antonio Dellagostin and Fabr{\'i}cio Souza Campos and Paulo Michel Roehe and Cl{\'a}udia Pinho Hartleben and Alan J A McBride}, journal={Protein expression and purification}, year={2017}, volume={130}, pages={21-27} }