Origin of Life in Chemically Complex Messy Environments: 3rd Edition

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Origin of Life".

Deadline for manuscript submissions: closed (31 December 2025) | Viewed by 2098

Special Issue Editors


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Guest Editor
Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
Interests: origin of life; RNA world; minimal synthetic cells; molecular biology; protein and RNA biophysics; macromolecular crowding and confinement; UV damage; fluorescence spectroscopy
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
Interests: origin of life; RNA world; early evolution of life
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The first and second volume of the Special Issue “Origin of Life in Chemically Complex Messy Environments” (https://www.mdpi.com/journal/life/special_issues/Origin_of_Life https://www.mdpi.com/journal/life/special_issues/XLP4UL8706) were successes, and it is our pleasure to announce the third volume.

Traditionally, the vast majority of prebiotic chemistry research has consisted of experiments focused on the behavior of a restricted spectrum of organic molecules, usually studying the components of life separately, where the results are limited by the simulated scenario, also described as "clean and isolated" experiments. However, research on the origin of life needs to be expanded in order to enable continuous progress in the field. Considering the prebiotic Earth four billion years ago (a messy atmosphere, in other words), a chaotic mélange of diverse starting materials appears to be realistic. As prebiotic chemists and origin-of-life researchers, we must modify our current approach and consider more chemical and geological scenarios in which both physical processes and driving forces toward primitive life formation are examined. In this Special Issue, we welcome the submission of original research papers, comprehensive reviews, and perspectives that demonstrate or summarize advances related to the origin of life in various complex chemical and prebiotically feasible environments.

Dr. Ranajay Saha
Dr. Alberto Vázquez-Salazar
Guest Editors

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Keywords

  • origin of life
  • complex chemical systems 
  • prebiotic chemistry 
  • prebiotic metabolisms 
  • chemical evolution 
  • prebiotic catalysts

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Published Papers (1 paper)

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Review

34 pages, 2544 KB  
Review
Complex and Messy Prebiotic Chemistry: Obstacles and Opportunities for an RNA World
by Alberto Vázquez-Salazar
Life 2026, 16(2), 240; https://doi.org/10.3390/life16020240 - 2 Feb 2026
Cited by 2 | Viewed by 1661
Abstract
Traditional prebiotic chemistry experiments often isolated single reactions under clean, controlled conditions, yet early Earth was chemically diverse and physically dynamic. Such primordial complexity likely imposed obstacles, including side reactions, low yields, and unstable intermediates, but it also generated opportunities, including redundant routes, [...] Read more.
Traditional prebiotic chemistry experiments often isolated single reactions under clean, controlled conditions, yet early Earth was chemically diverse and physically dynamic. Such primordial complexity likely imposed obstacles, including side reactions, low yields, and unstable intermediates, but it also generated opportunities, including redundant routes, parallel pathways, and environmental filters that could bias mixtures toward subsets of persistent and chemically productive compounds. This review examines how heterogeneous prebiotic settings could generate RNA precursors, including nucleobases, ribose, and phosphate-containing species, through multiple concurrent pathways. Although side reactions can sequester carbon in inert tars and reduce yields of specific targets, networked chemistry can also enhance robustness when different routes converge on shared intermediates, or when apparent byproducts reenter productive cycles. Environmental factors such as ultraviolet irradiation, mineral surfaces, wet-dry cycling, and thermal gradients can act as constraints that enrich certain products by differential stability, reactivity, and compartmentalization. In this context, the RNA world hypothesis remains compelling, as RNA can store heritable sequence information and catalyze reactions through sequence dependent folding, thereby linking heredity and chemistry within a single polymer. At the same time, the emergence of functional sequence information and of control architectures that couple sequence to reproducible function remains a central open problem, and it sets clear limits on what chemistry alone can explain. Rather than dismissing messy mixtures as irrelevant noise, it is more accurate to treat them as the native context in which concentration mechanisms, environmental cycling, and selective persistence could enable the accumulation and survival of RNA related molecules. Full article
(This article belongs to the Special Issue Origin of Life in Chemically Complex Messy Environments: 3rd Edition)
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