Cited by 14Origins and Evolution of LifeEvolution and Genetic DynamicsRNA and protein synthesis mechanisms

Mutations and Lethality in Simulated Prebiotic Networks

Inger, Aron, Solomon, Ariel, Shenhav, Barak, Olender, Tsviya, Lancet, Doron·2009·Journal of Molecular Evolution

Abstract

The Graded Autocatalysis Replication Domain (GARD) model describes an origin of life scenario which involves non-covalent compositional assemblies, made of monomeric mutually catalytic molecules. GARD constitutes an alternative to informational biopolymers as a mechanism of primordial inheritance. In the present work, we examined the effect of mutations, one of the most fundamental mechanisms for evolution, in the context of the networks of mutual interaction within GARD prebiotic assemblies. We performed a systematic analysis analogous to single and double gene deletions within GARD. While most deletions have only a small effect on both growth rate and molecular composition of the assemblies, ~10% of the deletions caused lethality, or sometimes showed enhanced fitness. Analysis of 14 different network properties on 2,000 different GARD networks indicated that lethality usually takes place when the deleted node has a high molecular count, or when it is a catalyst for such node. A correlation was also found between lethality and node degree centrality, similar to what is seen in real biological networks. Addressing double knockout mutations, our results demonstrate the occurrence of both synthetic lethality and extragenic suppression within GARD networks, and convey an attempt to correlate synthetic lethality to network node-pair properties. The analyses presented help establish GARD as a workable alternative prebiotic scenario, suggesting that life may have begun with large molecular networks of low fidelity, that later underwent evolutionary compaction and fidelity augmentation.

Integrity signals

Registry

Crossref · 10.1007/s00239-009-9281-y

Cites

75 of 75 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • With a catalytic intensity cut-off below which β elements are set to zero, most randomly formed GARD compositional assemblies will not be RAF.

    “With such a modification, most randomly formed GARD compositional assemblies will not be RAF.”
  • A majority of depletions had only a small effect on the composome growth rate, but approximately 10% of them diminished growth appreciably, and approximately 1% showed up to ×300 enhancement of the composome replicative growth rate.

    “A majority of depletions had only a small effect on the composome growth rate, but approximately 10% of them diminished growth appreciably, and approximately 1% rewardingly showed up to ×300 enhancement of the composome replicative growth rate.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Inger, A., Solomon, A., Shenhav, B., Olender, T., & Lancet, D.
Affiliations
Crown Human Genome Center (IL)
Corresponding author
Lancet, Doron
Venue
Journal of Molecular Evolution
Published
2009-09-29
Volume
69
Issue
5
Pages
568-578
ISSN
  • 0022-2844 (ISSN-L)
  • 1432-1432
OpenAlex
W2093342364
Cited by
14
References
75
Citations by year
2024: 2 · 2021: 2 · 2018: 2 · 2016: 1 · 2014: 1 · 2012: 2
FWCI
1.01
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Molecular Evolution (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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
origin of life, genetic mutations, lethality, synthetic lethality, double knockout, network topology, molecular evolution
MeSH terms
Origin of Life, Catalysis, Models, Chemical, Mutation, Polymers, Thermodynamics, Evolution, Chemical

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review