Intramolecular RNA replicase: Possibly the first self-replicating molecule in the RNA world
Abstract
Although there is more and more evidence suggested the existence of an RNA World during the origin of life, the scenario concerning the origin of the RNA World remains blurry. Usually it is speculated that it originated from a prebiotic nucleotide pool, during which a self-replicating RNA synthesis ribozyme may have emerged as the first ribozyme - the RNA replicase. However, there is yet no ersuasive supposition for the mechanism for the self-favouring feature of the replicase, thus the speculation remains unconvincing. Here we suggest that intramolecular catalysis is a possible solution. Two RNA synthesis ribozymes may be integrated into one RNA molecule, as two functional domains which could catalyze the copy of each other. Thus the RNA molecule could self-replicate and be referred to as "intramolecular replicase" here. Computational simulation to get insight into the dynamic mechanism of emergence of the intramolecular replicase from a nucleotide pool is valuable and would be included in a following work of our group.
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The notion of an extended RNA World in which RNAs catalyze many biochemical reactions as well as cell division remains controversial.
“Despite these observations, the notion of an extended RNA World in which RNAs catalyze many biochemical reactions as well as cell division remains controversial”
From The Emergence of Life (2019) · cites this paper as Ma and Yu 2006
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- Authors
- Ma, W., & Yu, C.
- Affiliations
- Wuhan University (CN)
- Corresponding author
- Ma, Wentao
- ORCID
- Venue
- Origins of Life and Evolution of Biospheres
- Published
- 2006-08
- Volume
- 36
- Issue
- 4
- Pages
- 413-420
- ISSN
- 0169-6149 (ISSN-L)
- 1573-0875
- OpenAlex
- W2087207463
- Cited by
- 20
- References
- 35
- Citations by year
- 2026: 1 · 2025: 1 · 2019: 1 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 2
- FWCI
- 0.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Origins of Life and Evolution of Biospheres (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China
- Wuhan University
- State Key Laboratory of Software Engineering
- Topics
- 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
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
- Keywords
- RNA world, origin of life, RNA replicase, intramolecular catalysis, self-replicating molecules, ribozyme evolution, RNA self-replication
- MeSH terms
- Catalysis, Models, Chemical, RNA, RNA-Dependent RNA Polymerase, RNA, Catalytic, Evolution, Molecular
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