Dpb11 facilitates the colocalization of Mec1-Ddc2 with its activators on gapped DNA
Using single-molecule imaging and force spectroscopy, this study reveals that the checkpoint mediator Dpb11 facilitates the colocalization of the Mec1-Ddc2 kinase complex with its activators on gapped DNA by directly recruiting Mec1-Ddc2 to ss-dsDNA junctions and bridging ssDNA to reduce the effective gap length.