Transient expression of recombinant proteins in plants using potato virus X based vectors
2021
Plants become a promising biofactory for the large-scale production of recombinant proteins due to low cost, scalability, and safety. Agroinfiltration of plant leaves with a plant viral vector carrying a gene of interest is a rapid and efficient method for protein production in plants. Currently this method is in use for producing a wide range of proteins for multiple applications, including vaccine antigens, antibodies, and protein nanoparticles such as virus-like particles. A number of pharmaceutical proteins produced by transient expression are currently in clinical development. Here, we describe potato virus X based vector pEff-GFP enabling fast and high-level expression of recombinant proteins in Nicotiana benthamiana plants. The pEff vector provides green fluorescent protein expression levels of up to 30% of total soluble protein (about 1mg per g of fresh leaf tissue) and was successfully applied for the production of the immunogens of potential clinical interest.
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