Application of MF3 Microbial Recombinant Protein in Refolding of Plant Chitinase

Abstract— Expression of recombinant proteins is important for studying their biological functions. For the primary description of protein properties, the E. coli expression system is most often used. However, in overexpression conditions, the rate of aggregation of target proteins often exceeds the rate of proper folding, resulting in the formation of insoluble inclusion bodies. Inclusion bodies are a clear disadvantage of the E. coli expression system since they prevent the extraction of target recombinant proteins. The use of chaperone-like proteins in vitro while refolding a target protein is one of the solutions to the existing problem. In this study, the MF3 recombinant protein is an example of a chaperone-like protein, which increases the yield of soluble plant chitinase by 92% compared to the yield of this protein using the standard refolding procedure.