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  • Title: Bacterial and plant-produced scFv proteins have similar antigen-binding properties.
    Author: Bruyns AM, De Jaeger G, De Neve M, De Wilde C, Van Montagu M, Depicker A.
    Journal: FEBS Lett; 1996 May 13; 386(1):5-10. PubMed ID: 8635602.
    Abstract:
    A gene encoding a single-chain variable (scFv) antibody fragment was expressed as a cytoplasmic and endoplasmic reticulum-targeted protein in transgenic tobacco plants. In both cases, the scFv accumulated up to 0.01% of total soluble protein (TSP). The same scFv fragment was also produced in the periplasm of Escherichia coli. Measurement of the affinity by ELISA indicates that the affinity of the bacterially made scFv is about 80-fold lower than that of the parental Fab fragment. The results suggest that the affinity of the plant-produced scFv fragments is reduced to a similar extent, implying that all the plant-produced scFv fragments are antigen binding.
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