Homologous recombination defects and how they affect replication fork maintenance

Abstract

Homologous recombination (HR) repairs DNA double strand breaks (DSBs) and stabilizes replication forks (RFs). RAD51 is the recombinase for the HR pathway. To preserve genomic integrity, RAD51 forms a filament on the 3″ end of a DSB and on a single-stranded DNA (ssDNA) gap. But unregulated HR results in undesirable chromosomal rearrangements. This review describes the multiple mechanisms that regulate HR with a focus on those mechanisms that promote and contain RAD51 filaments to limit chromosomal rearrangements. If any of these pathways break down and HR becomes unregulated then disease, primarily cancer, can result.

Keywords

homologous recombination - replication fork stability - RAD51 filaments - genomic integrity - gross chromosomal rearrangements

Publikationsverlauf

Eingereicht: 22. Januar 2019

Angenommen: 18. März 2019

Artikel online veröffentlicht:
10. Mai 2021

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