Reference: Lee RS, et al. (2024) Stressed? Break-induced replication comes to the rescue! DNA Repair (Amst) 142:103759

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Abstract


Break-induced replication (BIR) is a homologous recombination (HR) pathway that repairs one-ended DNA double-strand breaks (DSBs), which can result from replication fork collapse, telomere erosion, and other events. Eukaryotic BIR has been mainly investigated in yeast, where it is initiated by invasion of the broken DNA end into a homologous sequence, followed by extensive replication synthesis proceeding to the chromosome end. Multiple recent studies have described BIR in mammalian cells, the properties of which show many similarities to yeast BIR. While HR is considered as "error-free" mechanism, BIR is highly mutagenic and frequently leads to chromosomal rearrangements-genetic instabilities known to promote human disease. In addition, it is now recognized that BIR is highly stimulated by replication stress (RS), including RS constantly present in cancer cells, implicating BIR as a contributor to cancer genesis and progression. Here, we discuss the past and current findings related to the mechanism of BIR, the association of BIR with replication stress, and the destabilizing effects of BIR on the eukaryotic genome. Finally, we consider the potential for exploiting the BIR machinery to develop anti-cancer therapeutics.

Reference Type
Journal Article | Review
Authors
Lee RS, Twarowski JM, Malkova A
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