Evidence map›Paper›PMID 29358375›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2018

Modular origins of biological electron transfer chains.

Hagai Raanan, Douglas H Pike, Eli K Moore, Paul G Falkowski, Vikas Nanda

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–field-weighted citation impact
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

19 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Science of the gaps.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  5. On the emergence of metabolism: the evolution of proteins that powered life.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  6. BioIron: Origin, Chemical Properties, and Biological Functions.Advances in experimental medicine and biology · 2025
    Review
  7. Reused Protein Segments Linked to Functional Dynamics.Molecular biology and evolution · 2024
    Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Article
  14. Review
  15. Nature's nitrite-to-ammonia expressway, with no stop at dinitrogen.Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry · 2022
    Review
  16. Small protein folds at the root of an ancient metabolic network.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  17. Article
  18. Article
  19. 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

5 authors.

Hagai RaananEnvironmental Biophysics and Molecular Ecology Program, Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901.
Douglas H PikeCenter for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ 08854.
Eli K MooreEnvironmental Biophysics and Molecular Ecology Program, Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901.
Paul G FalkowskiEnvironmental Biophysics and Molecular Ecology Program, Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901; falko@marine.rutgers.edu nandavi@cabm.rutgers.edu.
Vikas NandaCenter for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ 08854; falko@marine.rutgers.edu nandavi@cabm.rutgers.edu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Oxidoreductases catalyze electron transfer reactions that ultimately provide the energy for life. A limited set of ancestral protein-metal modules are presumably the building blocks that evolved into this diverse protein family. However, the identity of these modules and their path to modern oxidoreductases is unknown. Using a comparative structural analysis approach, we identify a set of fundamental electron transfer modules that have evolved to form the extant oxidoreductases. Using transition metal-containing cofactors as fiducial markers, it is possible to cluster cofactor microenvironments into as few as four major modules: bacterial ferredoxin, cytochrome c, symerythrin, and plastocyanin-type folds. From structural alignments, it is challenging to ascertain whether modules evolved from a single common ancestor (homology) or arose by independent convergence on a limited set of structural forms (analogy). Additional insight into common origins is contained in the spatial adjacency network (SPAN), which is based on proximity of modules in oxidoreductases containing multiple cofactor electron transfer chains. Electron transfer chains within complex modern oxidoreductases likely evolved through repeated duplication and diversification of ancient modular units that arose in the Archean eon.

Indexed as

Evolution, MolecularBacterial ProteinsCoenzymesCytochromes cElectron TransportFerredoxinsMetalsModels, MolecularOxidoreductasesPlastocyaninProtein ConformationStructural Homology, ProteinBacterial ProteinsCoenzymesCytochromes cFerredoxinsMetalsOxidoreductasesPlastocyaninelectron transferevolutionmetalloproteinnetworkoxidoreductase

Identifiers

PMID29358375
PMCPMC5819401

What OpenQuestion holds

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Read underepoch 390

Registered trials

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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.