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Quantifying protein sequences with reference to the genetic code.

Journal of theoretical biology·2015
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The role of self-organization in developmental evolution.

Joseph E Hannon Bozorgmehr1

  • 1Laboratory of Systems Biology and Bioinformatics, Manchester, UK, bozorgmehr@tiscali.co.uk.

Theory in Biosciences = Theorie in Den Biowissenschaften
|April 17, 2014
PubMed
Summary

Gene regulatory networks control development, but self-organization, driven by intrinsic rules, also shapes complex patterns. This study explores the causal basis of self-organization in development and evolution.

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Area of Science:

  • Developmental Biology
  • Evolutionary Biology
  • Systems Biology

Background:

  • Gene regulatory networks (GRNs) involving transcription factors and cis-regulatory elements are central to understanding development and evolution.
  • Comparative genomics reveals conserved sequences across species with divergent anatomies, questioning solely GRN-driven pattern formation.
  • Transgenic studies demonstrate functional interchangeability of developmental elements, suggesting factors beyond gene products influence structure formation.

Purpose of the Study:

  • To investigate the role of self-organization in development and evolution, beyond traditional gene regulatory network models.
  • To examine the intrinsic rules and forces driving cellular and tissue coordination.
  • To explore methodological and theoretical approaches for understanding the causal basis of self-organization.

Main Methods:

  • Comparative sequence analysis across species.
  • Transgenic experiments to assess functional interchangeability of regulatory elements.
  • Analysis of regeneration experiments and in vitro structure formation.
  • Examination of epigenetic and non-genetic determinants of pattern formation.

Main Results:

  • Developmental patterns are influenced by self-organizing processes, not solely by gene products or signaling gradients.
  • Epigenetic and non-genetic factors play a significant role in the self-formation of complex biological structures.
  • Self-organization imposes coordination and holistic order on cells and tissues through intrinsic rules.

Conclusions:

  • Self-organization is a critical, underappreciated mechanism in developmental and evolutionary biology.
  • Understanding self-organization requires moving beyond solely genetic and protein-interaction-centric models.
  • Further research into intrinsic cellular and tissue rules is crucial for regenerative medicine and evolutionary studies.