How DNA Polymerase Epsilon accomplishes continuous leading strand synthesis during DNA replication is not understood. Here, the authors describe a two tiers mechanism required to sustain Pol Epsilon processivity: CHTF18-dependent loading of PCNA at leading strand and dsDNA binding by its POLE3-POLE4 subunits.
- Alessandro Agnarelli
- Lauryn Buckley-Benbow
- Roberto Bellelli