Cohesin complex oligomerization maintains end-tethering at DNA double-strand breaks
Jamie Phipps,
Mathias Toulouze,
Cécile Ducrot
et al.
Abstract:DNA double-strand breaks (DSB) must be repaired to ensure genome stability. Crucially, DSB ends must be kept together for timely repair. InSaccharomyces cerevisiae, two poorly understood pathways mediate DSB end-tethering. One employs the Mre11-Rad50-Xrs2 (MRX) complex to physically bridge DSB ends. Another requires the conversion of DSB ends into single-strand DNA (ssDNA) by Exo1, but the bridging proteins are unknown. We uncover that cohesin, its loader and Smc5/6 act with Exo1 to tether DSB ends. Remarkably… Show more
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