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Related Experiment Videos

Expression dynamics of a cellular metabolic network.

Peter Kharchenko1, George M Church, Dennis Vitkup

  • 1Department of Genetics, Harvard Medical School, Boston, MA, USA.

Molecular Systems Biology
|May 27, 2006
PubMed
Summary

Gene regulation in yeast metabolism is predominantly local. Metabolic genes show coexpression over short network distances, influenced by transcription factors and genome context.

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Area of Science:

  • Systems biology
  • Molecular biology
  • Genomics

Background:

  • Understanding biological networks requires analyzing gene expression regulation.
  • The Saccharomyces cerevisiae metabolic network is a key model system.

Purpose of the Study:

  • Investigate global and local gene expression regulation within the yeast metabolic network.
  • Determine the influence of network structure on gene coexpression patterns.

Main Methods:

  • Network analysis of Saccharomyces cerevisiae metabolic network.
  • Analysis of gene coexpression based on network distance.
  • Examination of transcription factor binding sites and genome context associations.

Main Results:

  • Gene regulation in yeast metabolism is predominantly local.
  • Metabolic genes exhibit significant coexpression at short network distances.
  • Positive coexpression decreases with network distance; negative coexpression peaks at intermediate distances.
  • Network topological motifs show distinct coexpression behaviors.

Conclusions:

  • Local regulation is a key feature of the yeast metabolic network.
  • Network topology and regulatory elements shape gene coexpression patterns.

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