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Decapping protein EDC4 regulates DNA repair and phenocopies BRCA1

AuthorsHernández, Gonzalo; Ramírez, María José; Minguillón, Jordi; Quiles, Paco; Ruiz de Garibay, Gorka; Aza Carmona, Miriam; Bogliolo, Massimo; Pujol, Roser; Prados-Carvajal, Rosario; Fernández, Juana; García, Nadia; López, Adrià; Gutiérrez-Enríquez, Sara; Díez, Orland; Benitez, Javier; Salinas, Mónica; Teulé, Alex; Brunet, Joan; Radice, Paolo; Peterlongo, Paolo; Schindler, Detlev; Huertas Sánchez, Pablo ; Puente, Xose S.; Lázaro, Conxi; Pujana, Miguel Ángel; Surrallés, Jordi
Issue Date6-Mar-2018
PublisherNature Publishing Group
CitationNature Communications 9: 967 (2018)
AbstractBRCA1 is a tumor suppressor that regulates DNA repair by homologous recombination. Germline mutations in BRCA1 are associated with increased risk of breast and ovarian cancer and BRCA1 deficient tumors are exquisitely sensitive to poly (ADP-ribose) polymerase (PARP) inhibitors. Therefore, uncovering additional components of this DNA repair pathway is of extreme importance for further understanding cancer development and therapeutic vulnerabilities. Here, we identify EDC4, a known component of processing-bodies and regulator of mRNA decapping, as a member of the BRCA1-BRIP1-TOPBP1 complex. EDC4 plays a key role in homologous recombination by stimulating end resection at double-strand breaks. EDC4 deficiency leads to genome instability and hypersensitivity to DNA interstrand crosslinking drugs and PARP inhibitors. Lack-of-function mutations in EDC4 were detected in BRCA1/2-mutation-negative breast cancer cases, suggesting a role in breast cancer susceptibility. Collectively, this study recognizes EDC4 with a dual role in decapping and DNA repair whose inactivation phenocopies BRCA1 deficiency
Publisher version (URL)https://doi.org/10.1038/s41467-018-03433-3
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