Abstract
Telomeres protect the ends of linear eukaryotic chromosomes from being recognized as DNA double-stranded breaks, thereby maintaining the stability of our genome. The highly heterochromatic nature of telomeres had, for a long time, reinforced the idea that telomeres were transcriptionally silent. Since a few years, however, we know that DNA-dependent RNA polymerase II transcribes telomeric DNA into TElomeric Repeat-containing RNA (TERRA) molecules in a large variety of eukaryotes. In this chapter, we summarize the current knowledge of telomere structure and function and extensively review data accumulated on TERRA biogenesis and regulation. We also discuss putative functions of TERRA in preserving telomere stability and propose future directions for research encompassing this novel and exciting aspect of telomere biology.
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Acknowledgments
We thank Harry Wischnewski for contributing to Fig. 4.2. We also thank Raghav Chawla and Amadou Bah for critical reading of the manuscript. CMA laboratory is supported by grants from ETHZ (ETH-15 08-1 and ETH-03 08-3), the Swiss National Science Foundation (3100A0-120090 and PP00P3-123356), the European Research Council (BFTERRA), and Fondazione Cariplo (2008-2507). CMCB is supported by a fellowship from Boehringer Ingelheim Fonds.
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Arora, R., Brun, C.M.C., Azzalin, C.M. (2011). TERRA: Long Noncoding RNA at Eukaryotic Telomeres. In: Ugarkovic, D. (eds) Long Non-Coding RNAs. Progress in Molecular and Subcellular Biology(), vol 51. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16502-3_4
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