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Updated: Feb 15, 2026

Production of Recombinant PRMT Proteins using the Baculovirus Expression Vector System
Published on: July 17, 2021
Evaluation of viral contamination in a baculovirus expression system
Chikako Ono1, Junki Hirano1, Toru Okamoto1
1Department of Molecular Virology, Research Institute for Microbial Diseases, Osaka University, 3-1, Yamada-oka, Suita, Osaka 565-0871, Japan.
Abstract:
Insect expression systems based on baculovirus are widely used for generating recombinant proteins. Here, the infectivity of baculoviruses under the physiological stresses of 'freeze-thaw' and sonication and the baculoviral contamination of recombinant proteins after protein purification were evaluated. Our findings suggest that Nonidet P-40 (NP-40) treatment of baculoviruses completely abolishes their infectivity and that recombinant proteins purified with affinity beads do not include infectious baculoviruses. We therefore suggest that baculovirus is completely inactivated by NP-40 treatment and that recombinant proteins are unlikely to be contaminated with infectious baculoviruses after their affinity purification.
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