Cited by 25Evolution and Genetic DynamicsOrigins and Evolution of LifeRNA and protein synthesis mechanisms

Quasispecies-like behavior observed in catalytic RNA populations evolving in a test tube

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Diaz Arenas, Carolina, Lehman, Niles·2010·BMC Evolutionary Biology

Abstract

BACKGROUND: During the RNA World, molecular populations were probably very small and highly susceptible to the force of strong random drift. In conjunction with Muller's Ratchet, this would have imposed difficulties for the preservation of the genetic information and the survival of the populations. Mechanisms that allowed these nascent populations to overcome this problem must have been advantageous. RESULTS: Using continuous in vitro evolution experimentation with an increased mutation rate imposed by MnCl2, it was found that clonal 100-molecule populations of ribozymes clearly exhibit certain characteristics of a quasispecies. This is the first time this has been seen with a catalytic RNA. Extensive genotypic sampling from two replicate lineages was gathered and phylogenetic networks were constructed to elucidate the structure of the evolving RNA populations. A common distribution was found in which a mutant sequence was present at high frequency, surrounded by a cloud of mutant with lower frequencies. This is a typical distribution of quasispecies. Most of the mutants in these clouds were connected by short Hamming distance values, indicating their close relatedness. CONCLUSIONS: The quasispecies nature of mutant RNA clouds facilitates the recovery of genotypes under pressure of being removed from the population by random drift. The empirical populations therefore evolved a genotypic resiliency despite a high mutation rate by adopting the characteristics of quasispecies, implying that primordial RNA pools could have used this strategy to avoid extinction.

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  • Quasi-species behavior was recently reported in an in vitro evolution experiment with replicating RNA species.

    “Such quasi-species behavior was recently reported in an in vitro evolution experiment with replicating RNA species [11].”

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Authors
Diaz Arenas, C., & Lehman, N.
Affiliations
Portland State University (US)
Corresponding author
Lehman, Niles
Venue
BMC Evolutionary Biology
Published
2010
Volume
10
Issue
1
Pages
80
ISSN
1471-2148 (ISSN-L)
OpenAlex
W2049026145
Cited by
25
References
75
Citations by year
2024: 1 · 2021: 4 · 2020: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 3 · 2013: 3 · 2012: 1
FWCI
1.44
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • BMC Evolutionary Biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PDXScholar (Portland State University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Science Foundation (0315286)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
quasispecies, ribozymes, in vitro evolution, RNA world, Muller's ratchet, genetic drift, high mutation rate, manganese chloride, phylogenetic networks, Hamming distance
MeSH terms
Base Sequence, Genotype, Molecular Sequence Data, Mutation, Nucleic Acid Conformation, Phylogeny, RNA, Catalytic, Sequence Analysis, RNA, Evolution, Molecular, Genetic Drift

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