Reference: Anzalone AV, et al. (2016) Reprogramming eukaryotic translation with ligand-responsive synthetic RNA switches. Nat Methods 13(5):453-8

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Abstract


Protein synthesis in eukaryotes is regulated by diverse reprogramming mechanisms that expand the coding capacity of individual genes. Here, we exploit one such mechanism, termed -1 programmed ribosomal frameshifting (-1 PRF), to engineer ligand-responsive RNA switches that regulate protein expression. First, efficient -1 PRF stimulatory RNA elements were discovered by in vitro selection; then, ligand-responsive switches were constructed by coupling -1 PRF stimulatory elements to RNA aptamers using rational design and directed evolution in Saccharomyces cerevisiae. We demonstrate that -1 PRF switches tightly control the relative stoichiometry of two distinct protein outputs from a single mRNA, exhibiting consistent ligand response across whole populations of cells. Furthermore, -1 PRF switches were applied to build single-mRNA logic gates and an apoptosis module in yeast. Together, these results showcase the potential for harnessing translation-reprogramming mechanisms for synthetic biology, and they establish -1 PRF switches as powerful RNA tools for controlling protein synthesis in eukaryotes.

Reference Type
Journal Article
Authors
Anzalone AV, Lin AJ, Zairis S, Rabadan R, Cornish VW
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