Evidence map›Paper›PMID 19324092›Full record

ArticleJournal of structural biology2009

The three-dimensional structure of the cytoplasmic domains of EpsF from the type 2 secretion system of Vibrio cholerae.

Jan Abendroth, Daniel D Mitchell, Konstantin V Korotkov, Tanya L Johnson, Allison Kreger, Maria Sandkvist, Wim G J Hol

Abstract read
In one paragraph

Article in Journal of structural biology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing 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

36 citing papers in PubMed.

  1. Integrative Structure and Function of thebioRxiv : the preprint server for biology · 2025
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  3. How Does the Archaellum Work?Biomolecules · 2025
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  4. Frontiers in microbiology · 2025
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  9. Landmark Discoveries and Recent Advances in Type IV Pilus Research.Microbiology and molecular biology reviews : MMBR · 2022
    Review
  10. Article
  11. Article
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  13. Review
  14. Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Molecular Insights into Pathogenesis and Infection withThe Malaysian journal of medical sciences : MJMS · 2017
    Review
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

7 authors.

Jan AbendrothDepartment of Biochemistry, Biomolecular Structure Center, University of Washington, 1959 Pacific Ave. NE, Box 357742, Seattle, WA 98195, USA.
Daniel D Mitchell
Konstantin V Korotkov
Tanya L Johnson
Allison Kreger
Maria Sandkvist
Wim G J Hol

Funding

STRUCTURAL STUDY OF HEAT-LABILE ENTEROTOXINR01AI034501 · NIAID · UNIVERSITY OF WASHINGTON · PI HOL, WILHELMUS G. J. · 1993 to 2013
$5.4M
Organization and Function of a Type II Secretion ComplexR01AI049294 · NIAID · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI SANDKVIST, MARIA B · 2002 to 2012
$2.9M
Structural Biology of Type II Protein Secretion by Bacterial CellsR56AI034501 · NIAID · UNIVERSITY OF WASHINGTON · PI HOL, WILHELMUS G. J. · 2015 to 2015
$490k
Organization and function of a type II secretion complexR56AI049294 · NIAID · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI SANDKVIST, MARIA B · 2015 to 2015
$393k
Howard Hughes Medical InstituteNIAID NIH HHS AI34501NIAID NIH HHS AI49294NIAID NIH HHS R01 AI034501NIAID NIH HHS R01 AI049294NIAID NIH HHS R56 AI034501NIAID NIH HHS R56 AI049294
6 · The paper itself

Abstract

The type 2 secretion system (T2SS), a multi-protein machinery that spans both the inner and the outer membranes of Gram-negative bacteria, is used for the secretion of several critically important proteins across the outer membrane. Here we report the crystal structure of the N-terminal cytoplasmic domain of EpsF, an inner membrane spanning T2SS protein from Vibrio cholerae. This domain consists of a bundle of six anti-parallel helices and adopts a fold that has not been described before. The long C-terminal helix alpha6 protrudes from the body of the domain and most likely continues as the first transmembrane helix of EpsF. Two N-terminal EpsF domains form a tight dimer with a conserved interface, suggesting that the observed dimer occurs in the T2SS of many bacteria. Two calcium binding sites are present in the dimer interface with ligands provided for each site by both subunits. Based on this new structure, sequence comparisons of EpsF homologs and localization studies of GFP fused with EpsF, we propose that the second cytoplasmic domain of EpsF adopts a similar fold as the first cytoplasmic domain and that full-length EpsF, and its T2SS homologs, have a three-transmembrane helix topology.

Indexed as

Amino Acid SequenceBacterial ProteinsBinding SitesCholera ToxinCrystallography, X-RayCytoplasmMetalsMolecular Sequence DataProtein Structure, QuaternaryProtein Structure, SecondaryProtein Structure, TertiarySequence Homology, Amino AcidVibrio choleraeBacterial ProteinsCholera ToxinMetals

Identifiers

PMID19324092
PMCPMC2730350

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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.