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Introduction to the concept of functioning-dependent structures in living cells
Michel Thellier1, Guillaume Legent, Vic Norris
1Laborartoire AMMIS, FRE CNRS 2829, Faculté des Sciences, Université de Rouen, 76821 Mont-Saint-Aignan, France. michel.thellier@univ-rouen.fr
Comptes Rendus Biologies
|January 5, 2005
Summary
Protein assemblies, termed functioning-dependent structures (FDSs), offer cellular advantages. These structures exhibit regulatory properties, even with simple enzymes, and contribute to entropy production characteristic of life.
Area of Science:
- Biochemistry
- Molecular Biology
- Systems Biology
Background:
- Protein associations can provide functional benefits like enhanced stability and efficiency.
- Existing models often overlook the dynamic nature of protein complexes in cellular functions.
Purpose of the Study:
- To introduce and model functioning-dependent structures (FDSs) as protein assemblies crucial for cellular tasks.
- To investigate the regulatory properties of simple two-partner FDSs.
Main Methods:
- Mathematical modeling of two-partner protein associations.
- Analysis of catalytic and inhibitory reaction kinetics.
- Thermodynamic considerations of FDS formation and decay.
Main Results:
- Functioning-dependent structures (FDSs) can exhibit regulatory behaviors, such as sigmoidal or linear kinetics, even when composed of basic Michaelis-Menten enzymes.
- These structures can be formed and maintained through their functional activity.
- FDSs contribute to entropy production, a hallmark of living systems.
Conclusions:
- Functioning-dependent structures (FDSs) represent a fundamental organizational principle in biological systems.
- The concept of FDSs provides a framework for understanding emergent regulatory properties from protein interactions.
- Further exploration of complex FDSs and networks is warranted to understand their role in cellular function and thermodynamics.