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Folding, Assembly, and Persistence: The Essential Nature and Origins of Biopolymers
Open accessAbstract
Life as we know it requires three basic types of polymers: polypeptide, polynucleotide, and polysaccharide. Here we evaluate both universal and idiosyncratic characteristics of these biopolymers. We incorporate this information into a model that explains much about their origins, selection, and early evolution. We observe that all three biopolymer types are pre-organized, conditionally self-complementary, chemically unstable in aqueous media yet persistent because of kinetic trapping, with chiral monomers and directional chains. All three biopolymers are synthesized by dehydration reactions that are catalyzed by molecular motors driven by hydrolysis of phosphorylated nucleosides. All three biopolymers can access specific states that protect against hydrolysis. These protected states are folded, using self-complementary interactions among recurrent folding elements within a given biopolymer, or assembled, in associations between the same or different biopolymer types. Self-association in a hydrolytic environment achieves self-preservation. Heterogeneous association achieves partner-preservation. These universal properties support a model in which life's polymers emerged simultaneously and co-evolved in a common hydrolytic milieu where molecular persistence depended on folding and assembly. We believe that an understanding of the structure, function, and origins of any given type of biopolymer requires the context of other biopolymers.
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Life in general uses three types of polymers: polynucleotides, polypeptides and polysaccharides.
“Beyond DNA, life, in general, uses three types of polymers: polynucleotides, polypeptides and polysaccharides [120].”
From Fundamental constraints to the logic of living systems (2024) · cites this paper as [120]
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Self-citationFundamental constraints to the logic of living systems
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“Beyond DNA, life, in general, uses three types of polymers: polynucleotides, polypeptides and polysaccharides [120].”
Background
Metadata
- Authors
- Runnels, C. M., Lanier, K. A., Williams, J. K., Bowman, J. C., Petrov, A. S., Hud, N. V., & Williams, L. D.
- Affiliations
- Georgia Institute of Technology (US)
- Corresponding author
- Williams, Loren Dean
- ORCID
- Venue
- Journal of Molecular Evolution
- Published
- 2018-11-19
- Volume
- 86
- Issue
- 9
- Pages
- 598-610
- ISSN
- 0022-2844 (ISSN-L)
- 1432-1432
- PMC
- PMC6267704
- OpenAlex
- W2901803850
- Cited by
- 79
- References
- 5
- Citations by year
- 2026: 5 · 2025: 20 · 2024: 9 · 2023: 15 · 2022: 8 · 2021: 10 · 2020: 8 · 2019: 4
- FWCI
- 2.95
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Molecular Evolution (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, other-oa)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- National Aeronautics and Space Administration (NNX16AJ28G and NNX16AJ29G)
- 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
- origin of life, biopolymers, polypeptides, polynucleotides, polysaccharides, kinetic trapping, molecular motors, chiral monomers, polymer folding, polymer self-assembly, early evolution of life
- MeSH terms
- Animals, Biopolymers, Catalysis, Humans, Peptides, Polymers, Polynucleotides, Polysaccharides, Protein Folding, RNA Folding
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