Abiogenesis through gradual evolution of autocatalysis into template-based replication.

Area of Science:

• Origin of Life studies
• Molecular Evolution
• Biochemistry

Background:

• The emergence of life from inanimate matter is a fundamental scientific question.
• Experimental systems capable of Darwinian evolution are crucial for understanding abiogenesis.
• The RNA world hypothesis posits RNA preceded DNA and proteins, with ribozymes as key players.

Purpose of the Study:

• To examine how experimentally feasible RNA reactions catalyzed by ribozymes can achieve evolutionary properties.
• To propose a pathway for the emergence of Darwinian evolution from non-living systems.
• To investigate the potential of autocatalytic systems and RNA self-replicases in early life evolution.

Main Methods:

• Review of existing literature on ribozyme catalysis and RNA reactions.
• Analysis of RNA ligation and recombination mechanisms.
• Exploration of theoretical models for autocatalytic systems and RNA replication.

Main Results:

• No self-replicating ribozyme (RNA self-replicase) has been identified to date.
• Autocatalytic systems involving multiple RNA species show potential for self-reproduction.
• The study proposes a gradual emergence of evolution, starting with autocatalysis and progressing to RNA replicases.

Conclusions:

• Experimentally feasible RNA reactions can potentially implement variation, heredity, and reproduction.
• Autocatalytic RNA systems may provide an initial step towards the emergence of evolution.
• A gradual pathway, from autocatalysis to RNA replicases, offers a plausible route for the origin of Darwinian evolution.