Isolation of New Ribozymes from a Large Pool of Random Sequences
Abstract
An iterative in vitro selection procedure was used to isolate a new class of catalytic RNAs (ribozymes) from a large pool of random-sequence RNA molecules. These ribozymes ligate two RNA molecules that are aligned on a template by catalyzing the attack of a 3'-hydroxyl on an adjacent 5'-triphosphate--a reaction similar to that employed by the familiar protein enzymes that synthesize RNA. The corresponding uncatalyzed reaction also yields a 3',5'-phosphodiester bond. In vitro evolution of the population of new ribozymes led to improvement of the average ligation activity and the emergence of ribozymes with reaction rates 7 million times faster than the uncatalyzed reaction rate.
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Evolution of catalytic RNA from mixtures of random sequences was demonstrated in the laboratory, but using purified nucleoside triphosphates and multiple enzymes.
“Evolution of catalytic RNA from mixtures of random sequences was demonstrated by Bartel and Szostak (1993) and Horning and Joyce (2016), but these were laboratory experiments using purified nucleoside triphosphates as a source of energy, and the reactions were catalyzed by multiple enzymes.”
From The Hot Spring Hypothesis for an Origin of Life (2020) · cites this paper as Bartel and Szostak (1993)
Bartel and Szostak demonstrated that 300mers of RNA starting from entirely random sequences can evolve ligase activity by a process of selection and amplification.
“Bartel and Szostak (1993) demonstrated that 300mers of RNA starting from entirely random sequences can evolve ligase activity by a process of selection and amplification.”
From The Hot Spring Hypothesis for an Origin of Life (2020) · cites this paper as Bartel and Szostak (1993)
Work involving ribozymes developed through in vitro evolution makes clear that an RNA replicase ribozyme could have existed.
“The possibility that an RNA replicase ribozyme could have existed has been made abundantly clear by work involving ribozymes that have been developed through in vitro evolution”
From Protocells and RNA Self-Replication (2018) · cites this paper as Bartel and Szostak 1993
R18 is an approximately 200-nucleotide ribozyme derived from a de novo ligase ribozyme and can extend RNA primers by up to 14 nucleotides using NTPs.
“R18 is a ribozyme, approximately 200 nucleotides (nt) long, derived from a ligase ribozyme generated de novo from a random RNA sequence pool12,13, and can catalyse the templated extension of RNA primers by up to 14 nucleotides (nts) using nucleoside triphosphates (NTPs)9.”
From In-ice evolution of RNA polymerase ribozyme activity (2013) · cites this paper as [12]
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Expanding the Scope of RNA Catalysis
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- Authors
- Bartel, D. P., & Szostak, J. W.
- Affiliations
- Massachusetts General Hospital (US)
- Venue
- Science
- Published
- 1993-09-10
- Volume
- 261
- Issue
- 5127
- Pages
- 1411-1418
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1980461160
- Cited by
- 900
- References
- 32
- Citations by year
- 2026: 22 · 2025: 13 · 2024: 23 · 2023: 16 · 2022: 23 · 2021: 27 · 2020: 18 · 2019: 15 · 2018: 15 · 2017: 15 · 2016: 19 · 2015: 24 · 2014: 24 · 2013: 21 · 2012: 19
- FWCI
- 17.66
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
- Keywords
- ribozymes, in vitro selection, RNA ligation, in vitro evolution, RNA self-splicing
- MeSH terms
- Base Sequence, Catalysis, Biological Evolution, Kinetics, Magnesium, Molecular Sequence Data, Mutation, Oligoribonucleotides, RNA Ligase (ATP), RNA, Temperature, Templates, Genetic, RNA, Catalytic
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