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Abstract
Transcription factor IIE (TFIIE) is a general initiation and promoter escape factor for RNA polymerase II composed of p56 (TFIIE-α) and p34 (TFIIE-β) subunits. Our laboratories experienced difficulty producing adequate quantities of recombinant human TFIIE-α for in vitro studies using available clones. We therefore re-engineered the TFIIE subunit production vectors and tested various Escherichia coli host strains to optimize expression. We report a much-improved system for production of pure, soluble, and active TFIIE complex for in vitro studies.
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