Evidence map›Paper›PMID 19131631›Full record

ArticleScience (New York, N.Y.)2009

Structure of a type IV secretion system core complex.

Rémi Fronzes, Eva Schäfer, Luchun Wang, Helen R Saibil, Elena V Orlova, Gabriel Waksman

Abstract read
In one paragraph

Article in Science (New York, N.Y.), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 165 papers.

0numbers the graph read from it
0cells of the map it votes in
165citing 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

165 citing papers in PubMed.

  1. Review
  2. Review
  3. In situ structures of theProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  4. Article
  5. Article
  6. Subdomains of theLife science alliance · 2024
    Article
  7. Review
  8. Article
  9. Structural Analysis of Protein Complexes by Cryo-Electron Microscopy.Methods in molecular biology (Clifton, N.J.) · 2024
    Review
  10. Review
  11. Defining Assembly Pathways by Fluorescence Microscopy.Methods in molecular biology (Clifton, N.J.) · 2024
    Article
  12. Comparative Analysis of T4SS Molecular Architectures.Journal of microbiology and biotechnology · 2023
    Review
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Review

105 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

6 authors.

Rémi FronzesInstitute of Structural and Molecular Biology, School of Crystallography, Birkbeck College, Malet Street, London, WC1E 7HX, UK.
Eva Schäfer
Luchun Wang
Helen R Saibil
Elena V Orlova
Gabriel Waksman

Funding

Biotechnology and Biological Sciences Research Council BB/C516144/1Biotechnology and Biological Sciences Research Council BB/C516179/1Biotechnology and Biological Sciences Research Council BB/F010281/1Wellcome Trust 065932Wellcome Trust 070776
6 · The paper itself

Abstract

Type IV secretion systems (T4SSs) are important virulence factors used by Gram-negative bacterial pathogens to inject effectors into host cells or to spread plasmids harboring antibiotic resistance genes. We report the 15 angstrom resolution cryo-electron microscopy structure of the core complex of a T4SS. The core complex is composed of three proteins, each present in 14 copies and forming a approximately 1.1-megadalton two-chambered, double membrane-spanning channel. The structure is double-walled, with each component apparently spanning a large part of the channel. The complex is open on the cytoplasmic side and constricted on the extracellular side. Overall, the T4SS core complex structure is different in both architecture and composition from the other known double membrane-spanning secretion system that has been structurally characterized.

Indexed as

PlasmidsBacterial Outer Membrane ProteinsBacterial ProteinsCloning, MolecularCryoelectron MicroscopyGram-Negative BacteriaImaging, Three-DimensionalModels, MolecularMultiprotein ComplexesProtein ConformationProtein Structure, QuaternaryVirulence FactorsBacterial Outer Membrane ProteinsBacterial ProteinsMultiprotein ComplexesVirulence Factors

Identifiers

PMID19131631
PMCPMC6710095

What OpenQuestion holds

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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.