Coevolution of compositional protocells and their environment
Open accessAbstract
The coevolution of environment and living organisms is well known in nature. Here, it is suggested that similar processes can take place before the onset of life, where protocellular entities, rather than full-fledged living systems, coevolve along with their surroundings. Specifically, it is suggested that the chemical composition of the environment may have governed the chemical repertoire generated within molecular assemblies, compositional protocells, while compounds generated within these protocells altered the chemical composition of the environment. We present an extension of the graded autocatalysis replication domain (GARD) model—the environment exchange polymer GARD (EE-GARD) model. In the new model, molecules, which are formed in a protocellular assembly, may be exported to the environment that surrounds the protocell. Computer simulations of the model using an infinite-sized environment showed that EE-GARD assemblies may assume several distinct quasi-stationary compositions (composomes), similar to the observations in previous variants of the GARD model. A statistical analysis suggested that the repertoire of composomes manifested by the assemblies is independent of time. In simulations with a finite environment, this was not the case. Composomes, which were frequent in the early stages of the simulation disappeared, while others emerged. The change in the frequencies of composomes was found to be correlated with changes induced on the environment by the assembly. The EE-GARD model is the first GARD model to portray a possible time evolution of the composomes repertoire.
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A simulation under constant population conditions showed the dynamics of takeover and extinction of dimer-containing composomes.
“A simulation under constant population conditions showed the dynamics of takeover and extinction of dimer-containing composomes [58].”
From Systems protobiology: origin of life in lipid catalytic networks (2018) · cites this paper as [58]
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- Authors
- Shenhav, B., Oz, A., & Lancet, D.
- Affiliations
- Crown Human Genome Center (IL)
- ORCID
- Venue
- Philosophical Transactions of the Royal Society B: Biological Sciences
- Publisher
- The Royal Society
- Published
- 2007-05-09
- Volume
- 362
- Issue
- 1486
- Pages
- 1813-1819
- ISSN
- 0962-8436 (ISSN-L)
- 1471-2970
- PMC
- PMC2442395
- OpenAlex
- W2156623436
- Cited by
- 40
- References
- 31
- Citations by year
- 2025: 1 · 2024: 2 · 2023: 3 · 2021: 3 · 2020: 1 · 2018: 4 · 2017: 1 · 2016: 1 · 2014: 5 · 2013: 2 · 2012: 3
- FWCI
- 2.00
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Philosophical Transactions of the Royal Society B Biological Sciences (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- 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
- Physical Sciences › Computer Science › Computational Theory and Mathematics › Cellular Automata and Applications
- Keywords
- protocells, origin of life, quasi-stationary states, molecular assembly
- MeSH terms
- Cell Physiological Phenomena, Computer Simulation, Environment, Biological Evolution, Models, Biological
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