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Detection of Homologous Recombination Intermediates via Proximity Ligation and Quantitative PCR in Saccharomyces cerevisiae
Published on: September 11, 2022
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Disparate requirements for RAD54L in replication fork reversal
Mollie E Uhrig1, Neelam Sharma1, Petey Maxwell1
1Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Nucleic Acids Research
|September 24, 2024
Summary
RAD54L protein restrains DNA replication fork progression and remodels forks during replication stress. It functions in two distinct RAD51-mediated pathways, suggesting RAD54L as a potential therapeutic target.
Area of Science:
- Molecular Biology
- DNA Repair
- Cell Biology
Background:
- RAD54L is a DNA motor protein involved in homologous recombination DNA repair.
- Its role in regulating DNA replication dynamics in cells is not well understood.
- Previous in vitro studies showed RAD54L can reverse and restore replication forks.
Purpose of the Study:
- To investigate the function of RAD54L in regulating DNA replication fork dynamics in human cells.
- To determine RAD54L's role in response to replication stress.
- To elucidate RAD54L's involvement in different DNA repair pathways.
Main Methods:
- Studies were conducted in human cancer cell lines and non-transformed cells.
- Replication fork progression and DNA gap formation were analyzed.
- RAD54L's role was assessed in BRCA1/2- and 53BP1-deficient cells.
- RAD54L's function was examined in relation to HLTF, SMARCAL1, and FBH1 pathways.
Main Results:
- RAD54L restrains replication fork progression and acts as a fork remodeler.
- RAD54L decelerates fork progression under replication stress and suppresses ssDNA gap formation.
- Loss of RAD54L prevents nascent strand DNA degradation in BRCA1/2- and 53BP1-deficient cells.
- RAD54L functions differently in the HLTF/SMARCAL1 and FBH1 pathways.
Conclusions:
- RAD54L plays a critical role in regulating DNA replication fork dynamics.
- RAD54L functions in distinct RAD51-mediated replication fork reversal pathways.
- RAD54L's disparate roles suggest its potential as a therapeutic target.
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