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The JigCell Problem Solving Environment (PSE)

The JigCell Problem Solving Environment (PSE). Marc Vass and Nick Allen Department of Computer Science Virginia Tech. Computational Molecular Biology. Conversions are done by hand. CKI. +APC. Cdh1. +APC. Cdk. Cdc20. Cln. Cdk. CycB. Molecular network. Differential equations. Pds1.

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The JigCell Problem Solving Environment (PSE)

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  1. The JigCell Problem Solving Environment (PSE) Marc Vass and Nick Allen Department of Computer Science Virginia Tech

  2. Computational Molecular Biology • Conversions are done by hand CKI +APC Cdh1 +APC Cdk Cdc20 Cln Cdk CycB Molecular network Differential equations

  3. Pds1 Esp1 Sic1 Sic1 P Esp1 Sister chromatid separation unaligned chromosomes SBF Cdh1 Pds1 Mcm1 Cdc20 PPX Net1P Tem1-GDP Cdc15/MEN Lte1 Bub2 Tem1-GTP Net1 Cdc14 Mcm1 Cdh1 Cdc20 RENT Cln2 Clb2 Clb5 Mad2 growth IEP unaligned chromosomes Mcm1 Cdc20 Cdh1 APC Clb2 Inactive trimer Cdc14 and Cln3 Swi5 CDKs SCF P Cdc14 Bck2 Inactive trimer ? MBF Clb5 DNA synthesis Clb2 SBF Cln2 Budding

  4. The JigCell PSE • Why we need a PSE • Representing a model • Making a prediction based on the model • Validating a model

  5. Without a PSE • Impossible to move beyond simple hand built models • Evaluating models is repetitive and time consuming • Leads to more errors

  6. Begin with a Wiring Diagram Frog Egg Extract Model Reaction Equations Ma->Mi Mi->Ma

  7. Enter Wiring Diagram into Model Builder

  8. Define Parameters and Initial Conditions

  9. Performing a Comparison • Identify experimental results of interest • Define a simulation with equivalent conditions • Massage simulation results into a usable form • Run an objective evaluation

  10. Define Experimental Data

  11. Associate Experimental Data with a Model

  12. Massage Simulation Results

  13. Define Objective Evaluation

  14. Compare Simulations to Experiments • Quick identification of problems

  15. Visualize Results MPF mphase activation MPF interphase activation

  16. Conclusions • JigCell allows modelers to produce truly useful computer representations of molecular regulatory systems • JigCell also allows modelers to quickly evaluate and re-evaluate changes to their models against experimental data

  17. Questions

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