Abstract
The hammerhead ribozyme, a small catalytic motif that promotes self-cleavage of the RNAs in which it is found naturally embedded, can be manipulated to recognize and cleave specifically in trans other RNAs in the presence of Mg2+. To be really effective, hammerheads need to operate at the low concentration of Mg2+ existing in vivo. Evidence has been gathered along the last years showing that tertiary stabilizing motifs (TSMs), particularly interactions between peripheral loops, are critical for the catalytic activity of hammerheads at physiological levels of Mg2+. These TSMs, in two alternative formats, have been incorporated into a new generation of more efficient trans-cleaving hammerheads, some of which are active in vitro and in planta when targeted against the highly structured RNA of a viroid (a small plant pathogen). This strategy has potential to confer protection against other RNA replicons, like RNA viruses infecting plants and animals.
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Acknowledgments
Our research is currently being supported by grants BFU2008-03154 and BFU2011-28443 from the Ministerio de Ciencia e Innovación of Spain and by the Generalitat Valenciana (ACOMP/2010/278).
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Carbonell, A., Flores, R., Gago, S. (2012). Hammerhead Ribozymes Against Virus and Viroid RNAs. In: Erdmann, V., Barciszewski, J. (eds) From Nucleic Acids Sequences to Molecular Medicine. RNA Technologies. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27426-8_16
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DOI: https://doi.org/10.1007/978-3-642-27426-8_16
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