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Accès public à partir du 20 août 2019
Università della Svizzera italiana

NBS1 promotes the endonuclease of the MRE11-RAD50 complex by sensing CtIP phosphorylation

Anand, Roopesh ; Jasrotia, Arti ; Bundschuh, Diana ; Howard, Sean Michael ; Ranjha, Lepakshi ; Stucki, Manuel ; Cejka, Petr

In: The EMBO Journal, 2019, vol. 38, no. 7, p. e101005

DNA end resection initiates DNA break repair by homologous recombination. MRE11-RAD50-NBS1 and phosphorylated CtIP perform the first resection step by MRE11-catalyzed endonucleolytic DNA cleavage. Human NBS1, more than its Xrs2 homologue from Saccharomyces cerevisiae, is crucial for this process, highlighting complex mechanisms that regulate the MRE11 nuclease in high eukaryotes. Using a...

Accès public à partir du 28 juil. 2019
Università della Svizzera italiana

Stepwise 5' DNA end-specific resection of DNA breaks by the Mre11-Rad50-Xrs2 and Sae2 nuclease ensemble

Cannavo, Elda ; Reginato, Giordano ; Cejka, Petr

In: Proceedings of the national academy of sciences of the United States of America, 2019, vol. 116, no. 12 (March 19), p. 5505-5513

To repair DNA double-strand breaks by homologous recombination, the 5′-terminated DNA strands must first be resected to produce 3′ overhangs. Mre11 from Saccharomyces cerevisiae is a 3′ → 5′ exonuclease that is responsible for 5′ end degradation in vivo. Using plasmid-length DNA substrates and purified recombinant proteins, we show that the combined exonuclease and endonuclease...