Moonlighting at replication forks–a new life for homologous recombination proteins BRCA 1, BRCA 2 and RAD 51

AM Kolinjivadi, V Sannino, A de Antoni, H Técher… - FEBS …, 2017 - Wiley Online Library
AM Kolinjivadi, V Sannino, A de Antoni, H Técher, G Baldi, V Costanzo
FEBS letters, 2017Wiley Online Library
Coordination between DNA replication and DNA repair ensures maintenance of genome
integrity, which is lost in cancer cells. Emerging evidence has linked homologous
recombination (HR) proteins RAD 51, BRCA 1 and BRCA 2 to the stability of nascent DNA.
This function appears to be distinct from double‐strand break (DSB) repair and is in part due
to the prevention of MRE 11‐mediated degradation of nascent DNA at stalled forks. The role
of RAD 51 in fork protection resembles the activity described for its prokaryotic orthologue …
Coordination between DNA replication and DNA repair ensures maintenance of genome integrity, which is lost in cancer cells. Emerging evidence has linked homologous recombination (HR) proteins RAD51, BRCA1 and BRCA2 to the stability of nascent DNA. This function appears to be distinct from double‐strand break (DSB) repair and is in part due to the prevention of MRE11‐mediated degradation of nascent DNA at stalled forks. The role of RAD51 in fork protection resembles the activity described for its prokaryotic orthologue RecA, which prevents nuclease‐mediated degradation of DNA and promotes replication fork restart in cells challenged by DNA‐damaging agents. Here, we examine the mechanistic aspects of HR‐mediated fork protection, addressing the crosstalk between HR and replication proteins.
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