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Structural limits for evolutive capacities in complex molecular systems
1Dept. de Logica y Filosofia della Ciencia, Donistia, S. Sebastian, Spain.
Rivista Di Biologia
|January 1, 1990
Summary
Enzymatic RNA molecules possess both reproductive and functional capabilities. A translation code is essential for evolving complexity into functional information, enabling self-reproduction and unlimited system evolution.
Area of Science:
- Origin of Life Research
- Molecular Evolution
- Biochemistry
Background:
- Investigating the evolutionary pathways of early biological systems.
- Focusing on the dual role of RNA as both a genetic material and a catalyst (ribozymes).
- Exploring the transition from non-coded to coded systems in molecular evolution.
Purpose of the Study:
- To evaluate the evolutionary potential of systems with and without a genetic code.
- To assess the role of enzymatic RNAs in bridging the gap towards a translation code.
- To demonstrate the necessity of a translation code for functional information transfer.
Main Methods:
- Theoretical evaluation of evolutionary capacities of enzymatic RNA systems.
- Analysis of RNA's potential to act as a 'synthetase' for nucleic acid-amino acid matching.
- Examination of functional limitations inherent in uncoded systems.
Main Results:
- Enzymatic RNAs exhibit reproductive and functional properties, but with inherent limitations.
- RNA's potential 'synthetase' activity represents a transitional step towards a code.
- A translation code is necessary to convert pre-translational complexity into functional information.
Conclusions:
- The development of a translation code is a critical evolutionary step.
- This code enables the transformation of formal complexity into functional information for self-reproduction.
- Once established, the coded system can evolve without apparent limits.
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