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• W2953313275 abstract "Abstract RNA-based devices controlling gene expression bear great promise for synthetic biology, as they offer many advantages like short response times and light metabolic burden compared to protein-circuits. However, little work has been done regarding their integration to multi-level regulated circuits. In this work, we combined a variety of small transcriptional activator RNAs (STARs) and toehold switches to build highly effective AND-gates. To characterise the components and their dynamic range, we used an Escherichia coli ( E. coli ) cell-free transcription-translation (TX-TL) system dispensed via nanoliter droplets. We analysed a prototype gate in vitro as well as in silico , employing parameterised ordinary differential equations (ODEs), where parameters were inferred via parallel tempering, a Markov chain Monte Carlo (MCMC) method. Based on this analysis, we created nine additional AND-gates and tested them in vitro . The functionality of the gates was found to be highly dependent on the concentration of the activating RNA for either the STAR or the toehold switch. All gates were successfully implemented in vivo , offering a dynamic range comparable to the level of protein circuits. This study shows the potential of a rapid prototyping approach for RNA circuit design, using cell-free systems in combination with a model prediction. Abbreviations TX-TL (transcription-translation), ODEs (ordinary differential equations), STARs (small transcriptional activator RNAs), MCMC (Markov chain Monte Carlo)." @default.
• W2953313275 created "2019-06-27" @default.
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• W2953313275 date "2019-06-11" @default.
• W2953313275 modified "2023-10-05" @default.
• W2953313275 title "Cell-free prototyping of AND-logic gates based on heterogeneous RNA activators" @default.
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• W2953313275 doi "https://doi.org/10.1101/661561" @default.
• W2953313275 hasPublicationYear "2019" @default.
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