Carcinogenesis Advance Access originally published online on February 20, 2006
Carcinogenesis 2006 27(5):883-892; doi:10.1093/carcin/bgi319
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DNA damage responses and their many interactions with the replication fork
1 Division of Experimental Hematology, Cincinnati Children's Hospital Medical Center and 2 Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA and 3 Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
* To whom correspondence should be addressed at: Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue ML 7013, Cincinnati, OH 45229, USA. Tel: +1 513 636 0499; Email: Paul.Andreassen{at}cchmc.org
The cellular response to DNA damage is composed of cell cycle checkpoint and DNA repair mechanisms that serve to ensure proper replication of the genome prior to cell division. The function of the DNA damage response during DNA replication in S-phase is critical to this process. Recent evidence has suggested a number of interrelationships of DNA replication and cellular DNA damage responses. These include S-phase checkpoints which suppress replication initiation or elongation in response to DNA damage. Also, many components of the DNA damage response are required either for the stabilization of, or for restarting, stalled replication forks. Further, translesion synthesis permits DNA replication to proceed in the presence of DNA damage and can be coordinated with subsequent repair by homologous recombination (HR). Finally, cohesion of sister chromatids is established coincident with DNA replication and is required for subsequent DNA repair by homologous recombination. Here we review these processes, all of which occur at, or are related to, the advancing replication fork. We speculate that these multiple interdependencies of DNA replication and DNA damage responses integrate the many steps necessary to ensure accurate duplication of the genome.
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