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Title

ALC1/eIF4A1-mediated regulation of CtIP mRNA stability controls DNA end resection

AuthorsMejías-Navarro, Fernando; Rodríguez-Real, Guillermo; Ramón, Javier; Camarillo, Rosa; Huertas Sánchez, Pablo
Issue Date2020
PublisherPublic Library of Science
CitationPLoS Genetics 16(5): e1008787 (2020)
AbstractDuring repair of DNA double-strand breaks, resection of DNA ends influences how these lesions will be repaired. If resection is activated, the break will be channeled through homologous recombination; if not, it will be simply ligated using the non-homologous end-joining machinery. Regulation of resection relies greatly on modulating CtIP, which can be done by modifying: i) its interaction partners, ii) its post-translational modifications, or iii) its cellular levels, by regulating transcription, splicing and/or protein stability/degradation. Here, we have analyzed the role of ALC1, a chromatin remodeler previously described as an integral part of the DNA damage response, in resection. Strikingly, we found that ALC1 affects resection independently of chromatin remodeling activity or its ability to bind damaged chromatin. In fact, it cooperates with the RNA-helicase eIF4A1 to help stabilize the most abundant splicing form of CtIP mRNA. This function relies on the presence of a specific RNA sequence in the 5′ UTR of CtIP. Therefore, we describe an additional layer of regulation of CtIP—at the level of mRNA stability through ALC1 and eIF4A1.
Publisher version (URL)https://doi.org/10.1371/journal.pgen.1008787
URIhttp://hdl.handle.net/10261/221221
DOI10.1371/journal.pgen.1008787
E-ISSN1553-7404
Appears in Collections:(CABIMER) Artículos
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