Prebiotic Chemistry and Origins of Life

Prebiotic chemistry investigates the suite of chemical reactions that preceded biological systems, aiming to reconstruct the pathways by which simple inorganic molecules gave rise to the first biomolecular assemblies. Central to this endeavour are the formation and polymerisation of nucleotides, the condensation of amino acids into oligopeptides, and the emergence of compartmentalised microenvironments that concentrate reactants and foster complex reaction networks. A key challenge is to identify plausible geochemical settings—such as hydrothermal vents, evaporative pools and mineral surfaces—that could supply energy gradients, catalytic surfaces and fluctuating conditions necessary for polymer synthesis and selection.

Within this framework, three interlinked themes dominate current research. First, the abiotic synthesis of nucleotide and peptide building blocks under realistic early‐Earth conditions seeks to explain how informational and catalytic polymers emerged. Second, protocellular compartmentalisation explores how amphiphilic molecules self‐assemble into boundary structures able to encapsulate nascent biopolymers, enabling selective permeability and protocell dynamics. Third, proto‐metabolic networks probe whether key reaction sequences analogous to modern glycolysis and carbon fixation could have arisen non‐enzymatically in iron-rich environments. Together, these strands converge towards an integrated model in which simple chemical systems undergo cycles of assembly, replication and selection, providing a plausible route to the first living entities.

Research from Nature Portfolio

Recent studies have revealed that repeated hydration and dehydration cycles in geothermal settings can drive continuous, one-pot synthesis of both canonical and non-canonical nucleosides. By varying temperature, pH and concentration in model wet–dry reactors, researchers have shown parallel formation of purine and pyrimidine ribonucleosides without the need for complex chemical activation, suggesting that dynamic surface chemistry could spontaneously yield key RNA precursors. In complementary work, it has been demonstrated that simple heterocycles such as barbituric acid and melamine can glycosylate with ribose in aqueous solution to produce nucleotides that self-assemble into linear supramolecular polymers. These assemblies selectively stabilise the β-anomeric form and promote base pairing, offering a robust mechanism for nucleotide configuration and mutual selection in a prebiotic milieu. Additionally, programmable dehydration–hydration condensation in flow reactors has been shown to facilitate high-yield formation of oligopeptides up to 20 residues long from mixtures of amino acids, establishing a controllable route to diverse peptide chains under mild conditions reminiscent of early Earth environments.

Prebiotic Chemistry and Origins of Life publication trend

The graph below shows the total number of articles in prebiotic chemistry and origins of life across all publications each year (not limited to Nature Index journals).

Technical terms

Prebiotic chemistry: The study of chemical reactions and processes occurring before the emergence of life on Earth.

Nucleotide: A molecular building block of RNA and DNA, comprising a sugar, phosphate and nucleobase.

Oligopeptide: A short chain of amino acids linked by peptide bonds, typically fewer than 20 residues.

Wet–dry cycle: Alternating hydration and dehydration phases that drive condensation reactions and polymer formation.

Protocell: A primitive, membrane-bounded assembly capable of encapsulating and concentrating biomolecules.

Ribozyme: An RNA molecule with catalytic activity, capable of accelerating chemical reactions without protein enzymes.

References

1. Wet-dry cycles enable the parallel origin of canonical and non-canonical nucleosides by continuous synthesis. Nature Communications (2018).
2. Spontaneous formation and base pairing of plausible prebiotic nucleotides in water. Nature Communications (2016).
3. Formation of oligopeptides in high yield under simple programmable conditions. Nature Communications (2015).
4. Bio-inspired CO 2 conversion by iron sulfide catalysts under sustainable conditions. Chemical Communications (2015).
5. Non‐enzymatic glycolysis and pentose phosphate pathway‐like reactions in a plausible Archean ocean. Molecular Systems Biology (2014).
6. Nonenzymatic copying of RNA templates containing all four letters is catalyzed by activated oligonucleotides. eLife (2016).