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Updated: Aug 10, 2026
11:10
Conducting Miller-Urey Experiments
Published on: January 21, 2014
A fission-fusion origin for life
1IFR Systems Integres Laboratoire de Microbiologie Faculté des Sciences et Techniques de Rouen, Mont Saint Aigan, France.
Summary
This study proposes a
Area of Science:
- Origin of Life research
- Astrobiology
- Biochemistry
Background:
- The origin of life remains a fundamental scientific question.
- Understanding protocell formation and evolution is key to this puzzle.
- Current models often lack a comprehensive framework for early cellular dynamics.
Purpose of the Study:
- To propose a 'cells-first' model for the origin of life.
- To investigate the role of protocell dynamics (fission and fusion) in evolution.
- To link membrane properties to the evolution of genetic coding.
Main Methods:
- Theoretical modeling of protocell formation and dynamics.
- Defining a fitness criterion based on membrane domain stability.
- Exploring membrane-catalyzed polymerization and co-evolution of content and metabolism.
- Investigating the emergence of coding from domain evolution.
Main Results:
- Protocells can form spontaneously, with fission and fusion driving evolution.
- Membrane domain stability, governed by molecular associations, acts as the fitness criterion.
- Macromolecular content and metabolism co-evolve with the membrane on a rugged fitness landscape.
- Domain evolution can potentially lead to the emergence of coding.
Conclusions:
- A 'cells-first' approach integrating protocell dynamics and membrane properties offers a viable pathway for the origin of life.
- Membrane domains are proposed as a crucial link between early protocells and the RNA/DNA world.
- This framework provides a testable hypothesis for the emergence of early life.
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