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Related Experiment Video

Updated: Jul 3, 2026

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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Published on: February 6, 2020

Compositional inheritance: comparison of self-assembly and catalysis.

Meng Wu1, Paul G Higgs

  • 1Origins Institute and Department of Physics and Astronomy, McMaster University, Hamilton, ON, L8S 4M1, Canada.

Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life
|July 19, 2008
PubMed
Summary

The lipid world theory proposes compositional inheritance in lipid assemblies, offering a potential alternative to genetic inheritance. This study demonstrates that this form of heredity is broadly applicable, even in simplified models.

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Area of Science:

  • Origin of Life Studies
  • Biophysics
  • Systems Chemistry

Background:

  • Modern cellular inheritance relies on nucleic acid replication.
  • Prebiotic synthesis of long polymers like RNA is challenging.
  • The lipid world theory suggests heredity via lipid assemblies.

Purpose of the Study:

  • To explore alternative heredity models beyond polymers.
  • To investigate the generality of compositional inheritance in lipid assemblies.
  • To compare self-assembly and catalytic models of lipid heredity.

Main Methods:

  • Developed models of lipid assemblies with nearest-neighbor interactions.
  • Incorporated spatial segregation of different molecule types.
  • Distinguished between self-assembly and catalytic models.
  • Analyzed compositional inheritance in two-component systems.

Main Results:

  • Compositional inheritance is more generally applicable than previously thought.
  • Both self-assembly and catalytic models support compositional inheritance.
  • Self-assembly models appear more relevant for simple lipids.
  • Two-component systems show parallels with population genetics models (Moran model).

Conclusions:

  • Lipid assemblies can exhibit compositional inheritance, providing a plausible non-polymer heredity mechanism.
  • The findings broaden the scope of the lipid world hypothesis for early life.
  • Compositional inheritance in lipids offers a potential bridge to understanding genetic inheritance.