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Evolution of 'design' principles in biochemical networks
P de Atauri1, D Orrell, S Ramsey
1Institute for Systems Biology, Seattle, WA 98103, USA.
Systems Biology
|October 21, 2006
Summary
Evolution shapes biological systems with recurring dynamic principles. Computer simulation aids in identifying these principles and analyzing their properties, as shown in a yeast galactose pathway model.
Area of Science:
- Systems Biology
- Computational Biology
- Evolutionary Biology
Background:
- Computer modeling is standard for engineered systems but challenging for biological systems due to inherent variability.
- Biological systems possess complex, dynamic organizational principles shaped by evolution.
- Accurate characterization of biological systems for simulation remains a significant hurdle.
Purpose of the Study:
- To propose that evolutionary processes result in identifiable, recurring dynamic organizational principles within biological systems.
- To demonstrate the utility of computer simulation in uncovering and analyzing these principles.
- To present a case study using a dynamic model of the yeast galactose utilization pathway.
Main Methods:
- Development of a dynamic computational model for the galactose utilization pathway in yeast.
- Analysis of the model to identify emergent organizational features and dynamic properties.
- Comparison of model features to hypothesized evolutionary 'design principles'.
Main Results:
- The dynamic model of the yeast galactose pathway revealed specific features reflecting underlying organizational principles.
- These features represent recurring patterns consistent with evolutionary adaptations.
- Simulation allowed for the analysis of the dynamic behavior of these principles.
Conclusions:
- Computer simulation is a valuable tool for identifying and analyzing evolutionary-driven organizational principles in biological systems, despite inherent system complexities.
- The study highlights the potential of dynamic modeling to reveal 'design principles' in biology.
- The galactose utilization pathway in yeast serves as a concrete example of these principles in action.
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