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A Fission-Fusion Origin for Life
Open accessAbstract
To develop a comprehensive 'cells-first' approach to the origin of life, we propose that protocells form spontaneously and that the fission and fusion of these protocells drives the dynamics of their evolution. The fitness criterion for this evolution is taken to be the the stability (conservation) of domains in the protocellular membrane as determined by non-covalent molecular associations between the amphiphiles of the membrane and a subset of the macromolecules in the protocell. In the presence of a source of free energy the macromolecular content of the protocell (co-)evolves as the result of (domain-dependent) membrane-catalysed polymerisation of the prebiotic constituents delivered to the protocell by fusion. The metabolism of the cell therefore (co-)evolves on a rugged fitness landscape. We indicate how domain evolution with the same fitness criterion can potentially give rise to coding. Membrane domains may therefore provide the link between protocells and the RNA/DNA-world.
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“These features include spontaneous accretion of diverse and potentially interacting molecules from dilute solutions, and the facilitation of mutual interactions due to proximity effects and reduced dimensionality, as copiously indicated [29,67,115,154–156].”
From Systems protobiology: origin of life in lipid catalytic networks (2018) · cites this paper as [115]
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Metadata
- Authors
- Norris, V., & Raine, D. J.
- Affiliations
- Université de Rouen Normandie (FR)
- University of Leicester (GB)
- Venue
- Origins of life and evolution of the biosphere
- Published
- 1998-10
- Volume
- 28
- Issue
- 4-6
- Pages
- 523-537
- ISSN
- 0169-6149 (ISSN-L)
- 1573-0875
- OpenAlex
- W2033867172
- Cited by
- 63
- References
- 54
- Citations by year
- 2024: 1 · 2023: 2 · 2022: 1 · 2021: 4 · 2020: 5 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 3 · 2012: 5
- FWCI
- 2.18
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Origins of Life and Evolution of Biospheres (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Biotechnology and Biological Sciences Research Council
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
- Keywords
- origin of life, protocells, cell fission, cell fusion, membrane domains, amphiphilic molecules, prebiotic metabolism, fitness landscape, coevolution, RNA world
- MeSH terms
- Origin of Life, Amino Acids, Cell Membrane, DNA, Energy Metabolism, Membrane Fusion, Membrane Lipids, Models, Biological, Nucleotides, RNA, Thermodynamics, Evolution, Chemical
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