An RNA aptamer that induces transcription.

Abstract excerpt

We identified an RNA aptamer that induces TetR-controlled gene expression in Escherichia coli when expressed in the cell. The aptamer was found by a combined approach of in vitro selection for TetR binding and in vivo screening for TetR induction. The smallest active aptamer folds into a stem-loop with an internal loop interrupting the stem. Mutational analysis in vivo and in-line probing in vitro reveal this...

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