MRE11 and EXO1 nucleases degrade reversed forks and elicit MUS81-dependent fork rescue in BRCA2-deficient cells

BRCA proteins have emerged as key stabilizing factors for the maintenance of replication forks following replication stress. Here the authors describe how reversed replication forks are degraded in the absence of BRCA2, and a MUS81 and POLD3-dependent mechanism of rescue following the withdrawal of genotoxic agent.