Evidence map›Paper›PMID 23932589›Full record

ArticleStructure (London, England : 1993)2013

Conservation of protein structure over four billion years.

Alvaro Ingles-Prieto, Beatriz Ibarra-Molero, Asuncion Delgado-Delgado, Raul Perez-Jimenez, Julio M Fernandez, Eric A Gaucher, Jose M Sanchez-Ruiz, Jose A Gavira

Abstract read
In one paragraph

Article in Structure (London, England : 1993), 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed, 1 pooled it
–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

74 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  10. Review
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  13. The evolutionary history and modern diversity of triterpenoid cyclases.bioRxiv : the preprint server for biology · 2025
    Article
  14. Article
  15. Functional recoding ofFrontiers in plant science · 2025
    Article
  16. Article
  17. Article
  18. Article
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  20. Article

14 more citing papers are in PubMed but not listed here.

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

8 authors.

Alvaro Ingles-PrietoDepartamento de Química Física, Facultad de Ciencias, Universidad de Granada, Granada 18071, Spain.
Beatriz Ibarra-Molero
Asuncion Delgado-Delgado
Raul Perez-Jimenez
Julio M Fernandez
Eric A Gaucher
Jose M Sanchez-Ruiz
Jose A Gavira

Funding

Single Molecule Studies of Titin ElasticityR01HL061228 · NHLBI · MAYO CLINIC COLL OF MEDICINE, ROCHESTER · PI FERNANDEZ, JULIO M · 1999 to 2017
$7.4M
Nanomechanics of the extracellular matrixR01HL066030 · NHLBI · MAYO CLINIC COLL OF MEDICINE, ROCHESTER · PI FERNANDEZ, JULIO M · 2001 to 2013
$5.0M
NHLBI NIH HHS HL061228NHLBI NIH HHS HL066030NHLBI NIH HHS R01 HL061228NHLBI NIH HHS R01 HL066030
6 · The paper itself

Abstract

Little is known about the evolution of protein structures and the degree of protein structure conservation over planetary time scales. Here, we report the X-ray crystal structures of seven laboratory resurrections of Precambrian thioredoxins dating up to approximately four billion years ago. Despite considerable sequence differences compared with extant enzymes, the ancestral proteins display the canonical thioredoxin fold, whereas only small structural changes have occurred over four billion years. This remarkable degree of structure conservation since a time near the last common ancestor of life supports a punctuated-equilibrium model of structure evolution in which the generation of new folds occurs over comparatively short periods and is followed by long periods of structural stasis.

Indexed as

Amino Acid SequenceArchaeal ProteinsConserved SequenceCrystallography, X-RayEscherichia coli ProteinsEvolution, MolecularHumansHydrogen BondingModels, MolecularPhylogenyProtein Structure, SecondaryProtein Structure, TertiaryStructural Homology, ProteinThioredoxinsArchaeal ProteinsEscherichia coli ProteinsThioredoxins

Identifiers

PMID23932589
PMCPMC3774310

What OpenQuestion holds

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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.