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Teaching Module Description

Key Value
Module Name: Cell Cycle in Frog Egg Extracts
Author(s): Jill Sible and John Tyson
Institution: Virginia Tech, Blacksburg, VA
Module Biology Topic Cell Cycle
Other Biology Topic: enter other biology topics
Keywords: cyclin, Cdk, Cdc25, Wee1, hysteresis, bistability
UG Course Level: Beginner
Tool(s): XPP
Other tool: Edit to Insert Name and URL for Tool
Module Created: 2007/9/22
Status Complete


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Abstract DNA synthesis and mitosis in frog eggs is controlled by periodic synthesis and degradation of the cyclin subunit of a cyclin-dependent protein kinase, and also by periodic phosphorylation and dephosphorylation of the kinase subunit. We construct a differential-equation model of these reactions and show that, under reasonable conditions, the model can exhibit bistability (arrest in interphase or in mitosis) or spontaneous oscillations (periodic replication and division).
Physiology figs_for_TWiki.ppt The cell division cycle is the sequence of events by which a growing cell replicates its DNA and divides the products of replication (the ‘sister chromatids’) equally between to daughter cells. In eukaryotes, the cell cycle consists of four sequential phases: G1 (first gap: DNA unreplicated), S (DNA synthesis), G2 (second gap: DNA replicated), and M (mitosis). Progression through these phases is unidirectional. Checkpoints within the system ensure that one phase of the cell cycle is complete before the next phase begins. Checkpoints also monitor the cell for DNA damage and delay cell cycle progression to allow for repair of the damage. In animal cells the restriction point (R) regulates entry into the cell cycle in the presence of growth factors. In the absence of growth factors, the cell withdraws to a state of quiescence called G0.
Model description Cell_Cycle_Module_Rev_1.doc:
Model files MPF.ode in WinnPP
Model exercises See Cell_Cycle_Module_Rev_1.doc or CellCycleExercises
and the answers to the exercises in Cell_Cycle_Module_Answers.doc
Further readings and references Furstenthal et al. 2001. J Cell Biol
Gautier J et al. 1991. Cell, Volume 67, Issue 1, p197-211.
Kumagai et al. 1991. Cell, Volume 64, 903-914
Mueller et al. 1995. Mol Biol Cell, Volume 6, 119-134
See more references in Cell_Cycle_Module_Rev_1.doc

-- RaquellHolmes - 02 Oct 2007

  • Cell Cycle Schematic:
Topic attachments
I Attachment Action Size Date Who Comment
Microsoft Word filedoc Cell_Cycle_Module_Answers.doc manage 50.0 K 2007-11-26 - 18:29 UnknownUser Created by Sible and Tyson, this document provides answers to the exercises provided
Microsoft Word filedoc Cell_Cycle_Module_Rev_1.doc manage 959.5 K 2007-11-26 - 18:37 UnknownUser Full module description: revision 1. First version was deleted
JPEGjpg Cell_Cycle_Module_Rev_1.jpg manage 69.0 K 2008-07-11 - 20:30 UnknownUser Cell Cycle Figure 1
Unknown file formatode MPF.ode manage 1.6 K 2007-10-24 - 18:17 UnknownUser ODE file for WinnPP of the described model
PowerPointppt figs_for_TWiki.ppt manage 214.5 K 2007-10-24 - 14:35 UnknownUser Powerpoint figures of molecular biology and mathematical model
Topic revision: r18 - 2011-05-08 - 14:17:37 - RaquellHolmes
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