Abstract
RNAs need to adopt a specific architecture to exert their task in cells. While significant progress has been made in describing RNA folding landscapes in vitro, understanding intracellular RNA structure formation is still in its infancy. This is in part due to the complex nature of the cellular environment but also to the limited availability of suitable methodologies. To assess the intracellular structure of large RNAs, we recently applied a chemical probing technique and a metal-induced cleavage assay in vivo. These methods are based on the fact that small molecules, like dimethyl sulfate (DMS), or metal ions, such as Pb2+, penetrate and spread throughout the cell very fast. Hence, these chemicals are able to modify accessible RNA residues or to induce cleavage of the RNA strand in the vicinity of a metal ion in living cells. Mapping of these incidents allows inferring information on the intracellular conformation, metal ion binding sites or ligand-induced structural changes of the respective RNA molecule. Importantly, in vivo chemical probing can be easily adapted to study RNAs in different cell types.
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Acknowledgement
This work was funded by the Austrian Science Foundation (FWF; grants Y401 and P21017 to C.W.).
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Wildauer, M., Zemora, G., Liebeg, A., Heisig, V., Waldsich, C. (2014). Chemical Probing of RNA in Living Cells. In: Waldsich, C. (eds) RNA Folding. Methods in Molecular Biology, vol 1086. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-667-2_9
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DOI: https://doi.org/10.1007/978-1-62703-667-2_9
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