Evidence map›Paper›PMID 35902742›Full record

ArticleNature chemistry2022

Prebiotic synthesis of α-amino acids and orotate from α-ketoacids potentiates transition to extant metabolic pathways.

Sunil Pulletikurti, Mahipal Yadav, Greg Springsteen, Ramanarayanan Krishnamurthy

Abstract read
PubMed Publisher
In one paragraph

Article in Nature chemistry, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
8.5field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 60 citations in OpenAlex.

  1. Review
  2. Electrocatalytic and Photocatalytic C─N Coupling From Small Molecules.Advanced materials (Deerfield Beach, Fla.) · 2026
    Review
  3. Article
  4. Mineral-facilitated aqueous synthesis of hydrogen cyanide from prebiotically abundant amino acids for chemical evolution.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  5. Can the origin of biosynthetic routes be explained by a Frankenstein's monster-like spontaneous assembly of prebiotic reactants?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  6. Before LUCA: unearthing the chemical roots of metabolism.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Prebiotic Synthesis ofJournal of the American Chemical Society · 2023
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Sunil Pulletikurti *Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA.ORCID 0000-0003-2007-6822
Mahipal Yadav *Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA.ORCID 0000-0003-4394-9737
Greg SpringsteenNSF-NASA Center for Chemical Evolution, Georgia Institute of Technology, Atlanta, GA, USA.ORCID 0000-0002-2020-281X
Ramanarayanan KrishnamurthyDepartment of Chemistry, The Scripps Research Institute, La Jolla, CA, USA. rkrishna@scripps.edu.ORCID 0000-0001-5238-610X
Scripps Research Institute · USGeorgia Institute of Technology · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Strecker reaction of aldehydes is the pre-eminent pathway to explain the prebiotic origins of α-amino acids. However, biology employs transamination of α-ketoacids to synthesize amino acids which are then transformed to nucleobases, implying an evolutionary switch-abiotically or biotically-of a prebiotic pathway involving the Strecker reaction into today's biosynthetic pathways. Here we show that α-ketoacids react with cyanide and ammonia sources to form the corresponding α-amino acids through the Bucherer-Bergs pathway. An efficient prebiotic transformation of oxaloacetate to aspartate via N-carbamoyl aspartate enables the simultaneous formation of dihydroorotate, paralleling the biochemical synthesis of orotate as the precursor to pyrimidine nucleobases. Glyoxylate forms both glycine and orotate and reacts with malonate and urea to form aspartate and dihydroorotate. These results, along with the previously demonstrated protometabolic analogues of the Krebs cycle, suggest that there can be a natural emergence of congruent forerunners of biological pathways with the potential for seamless transition from prebiotic chemistry to modern metabolism.

Indexed as

AmmoniaAspartic AcidAldehydesAmino AcidsCyanidesGlycineGlyoxylatesKeto AcidsMalonatesMetabolic Networks and PathwaysOxaloacetic AcidUreaAldehydesAmino AcidsAmmoniaAspartic AcidCyanidesGlycineGlyoxylatesKeto AcidsMalonatesOxaloacetic AcidUrea

Identifiers

PMID35902742
OpenAlexW4288447280

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.