TAILIEUCHUNG - Expression and purification of thioredoxin-his6 -ZmDREB2.7 fusion protein in Escherichia coli for raising antibodies

Dehydration-responsive element-binding (DREB) proteins play a critical role in the plant’s droughttolerance mechanism despite their presence in minor amounts in the cell. In this study, a maize-derived transcription factor protein, , was overexpressed in the Escherichia coli strain Rosetta 1. The interested gene conjugating with the thioredoxin gene (TrxA) and his6 tag in the pET-32a vector encoded a kDa fusion protein. The optimum condition for inducing the thioredoxin-his6 expression was five hours of induction with mM IPTG at 300 C. The Tris-HCl 20 mM pH lysis buffer was harnessed to extract the recombinant protein for the purification process. Using the immobilized-metal affinity chromatography column, the recombinant protein was purified and then injected into rabbits. The antisera containing polyclonal antibodies (pAbs) could specifically recognize the fusion protein. This study represents updated data on the bacterial expression of the recombinant protein and the production of pAbs. | Expression and purification of thioredoxin-his6 fusion protein in Escherichia coli for raising antibodies

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