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The yeast cell-cycle network is robustly designed.

Fangting Li1, Tao Long, Ying Lu

  • 1Centre for Theoretical Biology and Department of Physics, Peking University, Beijing 100871, China.

Proceedings of the National Academy of Sciences of the United States of America
|March 24, 2004
PubMed
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Cellular regulatory networks, like the budding yeast cell-cycle network, are highly stable and robust. Mathematical modeling shows these networks maintain function even with minor disruptions, suggesting inherent design for reliability.

Area of Science:

  • Molecular biology
  • Systems biology
  • Biophysics

Background:

  • Cellular functions are governed by complex molecular networks involving proteins, DNA, and RNA.
  • Understanding the stability and dynamics of these networks is crucial for cell biology.

Purpose of the Study:

  • To investigate the global dynamical properties and stability of molecular networks.
  • To analyze the cell-cycle regulatory network of budding yeast as a model system.

Main Methods:

  • Development and application of a simple dynamical model.
  • Analysis of network stability and robustness with respect to perturbations.

Main Results:

  • The cell-cycle network exhibits remarkable stability and robustness.

Related Experiment Videos

  • The G1 state serves as a global attractor for the network's dynamics.
  • The cell-cycle progression pathway is a globally attracting trajectory.

    • Conclusions:

    • Cellular regulatory networks are robustly designed to ensure reliable cellular functions.
    • The findings provide insights into the fundamental principles of biological network design.