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Zipf's law in gene expression.

Chikara Furusawa1, Kunihiko Kaneko

  • 1Center for Developmental Biology, The Institute of Physical and Chemical Research (RIKEN), Kobe 650-0047, Japan.

Physical Review Letters
|March 14, 2003
PubMed
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Gene expression in various organisms follows Zipf's law, a power-law distribution. This universal biological principle optimizes cellular self-reproduction efficiency and accuracy in intracellular reaction networks.

Area of Science:

  • Systems biology
  • Genomics
  • Biophysics

Background:

  • Gene expression levels vary significantly across different cell types and organisms.
  • Understanding the organizational principles of cellular reaction networks is crucial for deciphering life's fundamental processes.

Purpose of the Study:

  • To investigate the distribution patterns of gene expression abundances across diverse biological systems.
  • To explore the relationship between chemical abundance distributions and cellular self-reproduction efficiency.

Main Methods:

  • Analysis of gene expression data from public databases (yeast, nematodes, human tissues, embryonic stem cells).
  • Computational simulations of intracellular reaction network models.

Main Results:

Related Experiment Videos

  • Expressed gene abundances consistently follow a power-law distribution, specifically Zipf's law (exponent ≈ -1).
  • Zipf's law for chemical abundance is a universal characteristic of cellular systems with optimized intracellular reaction networks.

Conclusions:

  • Zipf's law represents a fundamental organizational principle in cellular gene expression and chemical composition.
  • This organization is linked to the optimization of efficiency and accuracy in cellular self-reproduction.
  • Findings offer new perspectives on the dynamics of biological reactions within living cells.