Analysis of Intron Sequences Reveals Hallmarks of Circular RNA Biogenesis in Animals
| Autor: | Ivanov, A., Memczak, S., Wyler, E., Torti, F., Porath, H.T., Orejuela, M.R., Piechotta, M., Levanon, E.Y., Landthaler, M., Dieterich, C., Rajewsky, N. |
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| Jazyk: | angličtina |
| Předmět: |
Base Sequence
Models Genetic Adenosine Deaminase RNA-Binding Proteins RNA Circular Introns Up-Regulation HEK293 Cells lcsh:Biology (General) Cardiovascular and Metabolic Diseases Animals Humans RNA RNA Interference RNA Editing RNA Small Interfering Caenorhabditis elegans Caenorhabditis elegans Proteins lcsh:QH301-705.5 |
| Zdroj: | Cell Rep Cell Reports, Vol 10, Iss 2, Pp 170-177 (2015) |
| ISSN: | 2211-1247 |
| DOI: | 10.1016/j.celrep.2014.12.019 |
| Popis: | SummaryCircular RNAs (circRNAs) are a large class of animal RNAs. To investigate possible circRNA functions, it is important to understand circRNA biogenesis. Besides human ALU repeats, sequence features that promote exon circularization are largely unknown. We experimentally identified circRNAs in C. elegans. Reverse complementary sequences between introns bracketing circRNAs were significantly enriched in comparison to linear controls. By scoring the presence of reverse complementary sequences in human introns, we predicted and experimentally validated circRNAs. We show that introns bracketing circRNAs are highly enriched in RNA editing or hyperediting events. Knockdown of the double-strand RNA-editing enzyme ADAR1 significantly and specifically upregulated circRNA expression. Together, our data support a model of animal circRNA biogenesis in which competing RNA-RNA interactions of introns form larger structures that promote circularization of embedded exons, whereas ADAR1 antagonizes circRNA expression by melting stems within these interactions. |
| Databáze: | OpenAIRE |
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