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Related Experiment Videos

Modelling the checkpoint response to telomere uncapping in budding yeast.

C J Proctor1, D A Lydall, R J Boys

  • 1Institute for Ageing and Health, and School of Clinical Medical Sciences-Gerontology, Centre for Integrated Systems Biology of Ageing and Nutrition, Newcastle University, Newcastle upon Tyne NE4 6BE, UK. c.j.proctor@ncl.ac.uk

Journal of the Royal Society, Interface
|October 4, 2006
PubMed
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This study models how uncapped telomeres in budding yeast trigger cell-cycle arrest via DNA damage response pathways. Simulations explore checkpoint protein activity and DNA repair dynamics.

Area of Science:

  • Cell Biology
  • Systems Biology
  • Genetics

Background:

  • Budding yeast utilizes cell-cycle arrest for DNA repair.
  • Telomeres are protected by the Cdc13 complex.
  • The cdc13-1 strain exhibits temperature-sensitive telomere uncapping.

Purpose of the Study:

  • To develop a mathematical model of the DNA damage response pathway initiated by uncapped telomeres.
  • To simulate the checkpoint activation leading to cell-cycle arrest in budding yeast.
  • To provide a framework for in silico experiments on gene knockouts.

Main Methods:

  • Mathematical modeling using Systems Biology Markup Language (SBML).
  • Stochastic simulations employing the BASIS system.
  • Tracking cell divisions, checkpoint protein activity, nuclease activity, and single-stranded DNA (ssDNA) generation over time.

Related Experiment Videos

Main Results:

  • The model simulates the temporal dynamics of the DNA damage response pathway.
  • It quantifies the impact of uncapped telomeres on cell-cycle arrest.
  • Simulations allow for comparison with experimental data from gene knockout studies.

Conclusions:

  • The developed model accurately represents the initiation of the checkpoint pathway by uncapped telomeres.
  • This modeling approach facilitates the investigation of DNA damage response mechanisms.
  • The model serves as a valuable tool for predicting the effects of genetic perturbations.