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Computing with competition in biochemical networks.

Anthony J Genot1, Teruo Fujii, Yannick Rondelez

  • 1LIMMS/CNRS-IIS, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Tokyo 153-8505, Japan.

Physical Review Letters
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

Cellular pathways exploit resource competition to process information and recognize complex patterns. This mechanism, using common cellular components, enables sophisticated decision-making and reveals unexpected biological correlations.

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Area of Science:

  • Systems biology
  • Molecular cell biology
  • Biophysics

Background:

  • Cells utilize finite molecular resources like enzymes and transcription factors for signaling and decision-making.
  • Independent cellular pathways frequently compete for these shared resources, a phenomenon complex to analyze due to its nonlinear nature.
  • The precise role of resource competition in cellular information processing remains largely undetermined.

Purpose of the Study:

  • To elucidate how cellular decision pathways can leverage resource competition for information processing.
  • To explore the pattern recognition capabilities enabled by competition for single or multiple molecular resources.
  • To investigate the emergent correlations between cellular components arising from shared competition.

Main Methods:

  • Theoretical modeling of cellular decision pathways.
  • Analysis of competition dynamics for molecular resources.
  • Investigation of multi-input motifs, resource competition, and positive feedback loops.

Main Results:

  • Competition for a single resource enables the recognition of convex sets of patterns.
  • Competition for multiple, overlapping, or cascaded resources expands pattern recognition capabilities.
  • Competition generates unexpected correlations between non-competing entities that share a common competitor.

Conclusions:

  • Resource competition is a fundamental mechanism for information processing in cellular decision pathways.
  • The proposed mechanism, based on ubiquitous cellular primitives, offers a novel framework for understanding cellular behavior.
  • Competition provides a versatile strategy for cells to enhance their information processing and decision-making capacities.