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Related Experiment Videos

Genetic information could be integrated extrinsically for simplest life forms.

G Allen1

  • 1U.S. Public Health Service, Bethesda, Maryland.

Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life
|January 1, 1988
PubMed
Summary

The origin of life may not require coupled polynucleotides and proteins. Simple self-reproducing catalysts, utilizing extrinsic information, could evolve into complex metabolic systems through natural selection.

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Area of Science:

  • Origin of Life Studies
  • Chemical Evolution
  • Systems Chemistry

Background:

  • Theories on the origin of life often focus on coupled polynucleotides and proteins, but face significant challenges.
  • Simple autocatalytic systems are proposed as an alternative but lack inherent genetic information generation.
  • Modern organisms utilize both intrinsic and extrinsic mechanisms for genetic information integration.

Purpose of the Study:

  • To explore an alternative model for the origin of life based on self-reproducing catalysts.
  • To investigate how genetic information can be accumulated and integrated in early chemical evolution.
  • To demonstrate the potential for simple catalytic systems to evolve into complex metabolic networks.

Main Methods:

  • Theoretical modeling of self-reproducing catalysts with positive feedback.

Related Experiment Videos

  • Analysis of information transfer from catalysts to their derivatives and by-products.
  • Conceptual framework for natural selection acting on catalytic systems and emergent metabolic networks.

    • Main Results:

    • Self-reproducing catalysts can transmit structural information to progeny and related molecules.
    • Novel molecules generated from successful catalysts are likely to possess catalytic properties.
    • Autocatalytic systems can grow and integrate into more complex metabolizing systems.

    Conclusions:

    • The origin of life may be achievable without the simultaneous requirement of polynucleotides and proteins.
    • Extrinsic mechanisms for information accumulation were available early in chemical evolution.
    • Natural selection acting on self-reproducing catalysts provides a plausible pathway to metabolic complexity.