Checkpoint functions of RecQ helicases at perturbed DNA replication fork

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Nafees Ahamad1, Saman Khan1, Alaa Taha A Mahdi1

  • 1Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA.

Current Genetics
|January 11, 2021
PubMed

Insights

RecQ helicases play vital roles in the DNA replication checkpoint, a crucial pathway for genomic stability. Studies in model organisms suggest these helicases may act as key sensors in this cellular process.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • The DNA replication checkpoint is essential for maintaining genomic integrity during cell division.
  • Its precise signaling mechanisms are not fully understood.
  • RecQ helicases are conserved enzymes implicated in DNA repair and replication.

Purpose of the Study:

  • To review the diverse roles of RecQ helicases in the DNA replication checkpoint across model organisms.
  • To present evidence supporting the function of fission yeast RecQ helicase Rqh1 as a potential sensor in this pathway.

Main Methods:

  • Literature review of RecQ helicase functions in DNA replication checkpoint.
  • Analysis of experimental data from four model organisms.
  • Specific investigation of Rqh1 in fission yeast.

Main Results:

  • RecQ helicases exhibit multiple functions within the replication checkpoint.
  • Evidence suggests Rqh1 in fission yeast may function as a sensor.
  • These helicases are critical for checkpoint activation and regulation.

Conclusions:

  • RecQ helicases are integral components of the DNA replication checkpoint.
  • Further research is warranted to elucidate the sensor role of Rqh1 and other RecQ helicases.
Keywords:
ATRBLMBudding yeastCHK1Cds1DNA replication checkpointFission yeastGenomic instabilityHelicaseMec1RECQ1RECQ4RECQ5Rad3RecQReplication stressRqh1SOS responseSgs1WRN

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