A model of yeast cell-cycle regulation based on multisite phosphorylation_1_1_1

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  • A model of yeast cell-cycle regulation based on multisite phosphorylation.
  • Barik D, Novak B, Paul MR, Tyson JJ
  • Molecular systems biology , 8/ 2010 , Volume 6 , pages: 405 , PubMed ID: 20739927
  • Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
  • In order for the cell's genome to be passed intact from one generation to the next, the events of the cell cycle (DNA replication, mitosis, cell division) must be executed in the correct order, despite the considerable molecular noise inherent in any protein-based regulatory system residing in the small confines of a eukaryotic cell. To assess the effects of molecular fluctuations on cell-cycle progression in budding yeast cells, we have constructed a new model of the regulation of Cln- and Clb-dependent kinases, based on multisite phosphorylation of their target proteins and on positive and negative feedback loops involving the kinases themselves. To account for the significant role of noise in the transcription and translation steps of gene expression, the model includes mRNAs as well as proteins. The model equations are simulated deterministically and stochastically to reveal the bistable switching behavior on which proper cell-cycle progression depends and to show that this behavior is robust to the level of molecular noise expected in yeast-sized cells (approximately 50 fL volume). The model gives a quantitatively accurate account of the variability observed in the G1-S transition in budding yeast, which is governed by an underlying sizer+timer control system.
Submitter of the first revision: Ashley Xavier
Submitter of this revision: Ashley Xavier
Modellers: Ashley Xavier

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Barik2010.xml sbml file with Barik2010 encoded. 295.04 KB Preview | Download

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Barik2010.cps copasi file 449.45 KB Preview | Download

  • Model originally submitted by : Ashley Xavier
  • Submitted: Dec 6, 2018 11:55:49 AM
  • Last Modified: Dec 6, 2018 11:59:48 AM
  • Version: 3 public model Download this version
    • Submitted on: Dec 6, 2018 11:59:48 AM
    • Submitted by: Ashley Xavier
    • With comment: adding sbml file
  • Version: 2 public model Download this version
    • Submitted on: Dec 6, 2018 11:55:49 AM
    • Submitted by: Ashley Xavier
    • With comment: Edited model metadata online.

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