Cited by 40Origins and Evolution of LifeEvolution and Genetic DynamicsCellular Automata and Applications

Coevolution of compositional protocells and their environment

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Shenhav, Barak, Oz, Aia, Lancet, Doron·2007·Philosophical Transactions of the Royal Society B: Biological Sciences

Abstract

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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Crossref · 10.1098/rstb.2007.2073

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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].”

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Authors
Shenhav, B., Oz, A., & Lancet, D.
Affiliations
Crown Human Genome Center (IL)
Venue
Philosophical Transactions of the Royal Society B: Biological Sciences
Published
2007-05-09
Volume
362
Issue
1486
Pages
1813-1819
ISSN
  • 0962-8436 (ISSN-L)
  • 1471-2970
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
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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