Article
Human mitochondrial degradosome prevents harmful mitochondrial R loops and mitochondrial genome instability
Author/s | Silva, Sonia
Pérez de Camino Cantos, Dolores Aguilera López, Andrés |
Department | Universidad de Sevilla. Departamento de Genética |
Publication Date | 2018 |
Deposit Date | 2018-11-21 |
Published in |
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Awards | Premio Anual Publicación Científica Destacada de la US. Facultad de Biología |
Abstract | R loops are nucleic acid structures comprising an DNA-RNA hybrid and a displaced single-stranded DNA. These structures may occur transiently during transcription, playing essential biological functions. However, persistent ... R loops are nucleic acid structures comprising an DNA-RNA hybrid and a displaced single-stranded DNA. These structures may occur transiently during transcription, playing essential biological functions. However, persistent R loops may become pathological as they are important drivers of genome instability and have been associated with human diseases. The mitochondrial degradosome is a functionally conserved complex from bacteria to human mitochondria. It is composed of the ATP-dependent RNA and DNA helicase SUV3 and the PNPase ribonuclease, playing a central role in mitochondrial RNA surveillance and degradation. Here we describe a new role for the mitochondrial degradosome in preventing the accumulation of pathological R loops in the mitochondrial DNA, in addition to preventing dsRNA accumulation. Our data indicate that, similar to the molecular mechanisms acting in the nucleus, RNA surveillance mechanisms in the mitochondria are crucial to maintain its genome integrity by counteracting pathological R-loop accumulation. |
Funding agencies | European Research Council (ERC) Ministerio de Economía y Competitividad (MINECO). España |
Project ID. | ERC2014 AdG669898 TARLOOP
BFU2013-42918-P BFU2016-75058-P |
Citation | Silva, S., Pérez de Camino Cantos, D. y Aguilera López, A. (2018). Human mitochondrial degradosome prevents harmful mitochondrial R loops and mitochondrial genome instability. Proceedings of the National Academy of Science, 115 (43), 11024-11029. |
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