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Analysis of Intron Sequences Reveals Hallmarks of Circular RNA Biogenesis in Animals

Open access
Ivanov, Andranik, Memczak, Sebastian, Wyler, Emanuel, Torti, Francesca, Porath, Hagit T., Orejuela, Marta R., Piechotta, Michael, Levanon, Erez Y., Landthaler, Markus, Dieterich, Christoph, Rajewsky, Nikolaus·2015·Cell Reports

Abstract

Circular 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.

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Metadata

Authors
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.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2015-01
Volume
10
Issue
2
Pages
170-177
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2019230794
Cited by
1,105
References
6
FWCI
19.71
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Analysis of Intron Sequences Reveals Hallmarks of Circular RNA Biogenesis in Animals. https://app.cochat.ai/papers/10.1016/j.celrep.2014.12.019
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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. (2015). Analysis of Intron Sequences Reveals Hallmarks of Circular RNA Biogenesis in Animals. Cell Reports. https://doi.org/10.1016/j.celrep.2014.12.019

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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