Evidence map›Paper›PMID 18250176›Full record

ArticleInfection and immunity2008

Proteomic characterization of the whole secretome of Legionella pneumophila and functional analysis of outer membrane vesicles.

Frank Galka, Sun Nyunt Wai, Harald Kusch, Susanne Engelmann, Michael Hecker, Bernd Schmeck, Stefan Hippenstiel, Bernt Eric Uhlin, Michael Steinert

Abstract read
In one paragraph

Article in Infection and immunity, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 96 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
96citing 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

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

  1. Pooled it
  2. Article
  3. Bacterial Outer Membrane Vesicles in Potentiating Cancer Vaccines: Progress and Prospects.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  4. Molecular evolution and adaptations ofFrontiers in cellular and infection microbiology · 2026
    Review
  5. mBio · 2025
    Article
  6. Article
  7. Review
  8. Small molecule communication ofMicrobiology and molecular biology reviews : MMBR · 2024
    Review
  9. Article
  10. Metabolic Endotoxemia: From the Gut to Neurodegeneration.International journal of molecular sciences · 2024
    Review
  11. Article
  12. Identification of virulence-associated factors in Vibrio parahaemolyticus with special reference to moonlighting protein: a secretomics study.International microbiology : the official journal of the Spanish Society for Microbiology · 2024
    Article
  13. Review
  14. Review
  15. Significance of extracellular vesicles in orchestration of immune responses inFrontiers in cellular and infection microbiology · 2024
    Review
  16. Article
  17. Article
  18. Review
  19. Review
  20. Review

36 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

9 authors.

Frank GalkaInstitut für Mikrobiologie, Technische Universität Braunschweig, Spielmannstr. 7, D-38106 Braunschweig, Germany.
Sun Nyunt Wai
Harald Kusch
Susanne Engelmann
Michael Hecker
Bernd Schmeck
Stefan Hippenstiel
Bernt Eric Uhlin
Michael Steinert

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Secretion of effector molecules is one of the major mechanisms by which the intracellular human pathogen Legionella pneumophila interacts with host cells during infection. Specific secretion machineries which are responsible for the subfraction of secreted proteins (soluble supernatant proteins [SSPs]) and the production of bacterial outer membrane vesicles (OMVs) both contribute to the protein composition of the extracellular milieu of this lung pathogen. Here we present comprehensive proteome reference maps for both SSPs and OMVs. Protein identification and assignment analyses revealed a total of 181 supernatant proteins, 107 of which were specific to the SSP fraction and 33 of which were specific to OMVs. A functional classification showed that a large proportion of the identified OMV proteins are involved in the pathogenesis of Legionnaires' disease. Zymography and enzyme assays demonstrated that the SSP and OMV fractions possess proteolytic and lipolytic enzyme activities which may contribute to the destruction of the alveolar lining during infection. Furthermore, it was shown that OMVs do not kill host cells but specifically modulate their cytokine response. Binding of immunofluorescently stained OMVs to alveolar epithelial cells, as visualized by confocal laser scanning microscopy, suggested that there is delivery of a large and complex group of proteins and lipids in the infected tissue in association with OMVs. On the basis of these new findings, we discuss the relevance of protein sorting and compartmentalization of virulence factors, as well as environmental aspects of the vesicle-mediated secretion.

Indexed as

Acanthamoeba castellaniiAnimalsBacterial ProteinsCell LineCell SurvivalCytokinesElectrophoresis, Gel, Two-DimensionalEpithelial CellsHumansLegionella pneumophilaLipaseMicroscopy, Atomic ForceMicroscopy, Electron, TransmissionPeptide HydrolasesProteomeSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationBacterial ProteinsCytokinesLipasePeptide HydrolasesProteomeUnilamellar LiposomesVirulence Factors

Identifiers

PMID18250176
PMCPMC2346698

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.