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Reference: Branzei D and Foiani M (2007) Interplay of replication checkpoints and repair proteins at stalled replication forks. DNA Repair (Amst) 6(7):994-1003

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Abstract

DNA replication is an essential process that occurs in all growing cells and needs to be tightly regulated in order to preserve genetic integrity. Eukaryotic cells have developed multiple mechanisms to ensure the fidelity of replication and to coordinate the progression of replication forks. Replication is often impeded by DNA damage or replication blocks, and the resulting stalled replication forks are sensed and protected by specialized surveillance mechanisms called checkpoints. The replication checkpoint plays an essential role in preventing the breakdown of stalled replication forks and the accumulation of DNA structures that enhance recombination and chromosomal rearrangements that ultimately lead to genomic instability and cancer development. In addition, the replication checkpoint is thought to assist and coordinate replication fork restart processes by controlling DNA repair pathways, regulating chromatin structure, promoting the recruitment of proteins to sites of damage, and controlling cell cycle progression. In this review we focus mainly on the results obtained in budding yeast to discuss on the multiple roles of checkpoints in maintaining fork integrity and on the enzymatic activities that cooperate with the checkpoint pathway to promote fork resumption and repair of DNA lesions thereby contributing to genome integrity.

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Journal Article
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Branzei D, Foiani M
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