Evidence map›Paper›PMID 9733690›Full record

ArticleJournal of bacteriology1998

Escherichia coli tol-pal mutants form outer membrane vesicles.

A Bernadac, M Gavioli, J C Lazzaroni, S Raina, R Lloubès

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 191 papers.

0numbers the graph read from it
0cells of the map it votes in
191citing papers in PubMed
5.0field-weighted citation impact, top 4% of its field
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

191 citing papers in PubMed, 373 citations in OpenAlex.

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  12. Enhanced Outer Membrane Vesicle Production inInternational journal of molecular sciences · 2025
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131 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

5 authors at 4 institutions in 2 countries.

A BernadacLaboratoire d'Ingénierie des Systèmes Macromoléculaires, UPR 9027, CNRS, Institut de Biologie Structurale et Microbiologie, 13402 Marseille Cedex 20, France.
M Gavioli
J C Lazzaroni
S Raina
R Lloubès
Institut de Biologie Structurale · FRCentre National de la Recherche Scientifique · FRPolyclinic Medical University · CHUniversité Claude Bernard Lyon 1 · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mutations in the tol-pal genes induce pleiotropic effects such as release of periplasmic proteins into the extracellular medium and hypersensitivity to drugs and detergents. Other outer membrane defective strains such as tolC, lpp, and rfa mutations are also altered in their outer membrane permeability. In this study, electron microscopy and Western blot analyses were used to show that strains with mutations in each of the tol-pal genes formed outer membrane vesicles after growth in standard liquid or solid media. This phenotype was not observed in tolC and rfaD cells in the same conditions. A tolA deletion in three different Escherichia coli strains was shown to lead to elevated amounts of vesicles. These results, together with plasmid complementation experiments, indicated that the formation of vesicles resulted from the defect of any of the Tol-Pal proteins. The vesicles contained outer membrane trimeric porins correctly exposed at the cell surface. Pal outer membrane lipoprotein was also immunodetected in the vesicle fraction of tol strains. The results are discussed in view of the role of the Tol-Pal transenvelope proteins in maintaining outer membrane integrity by contributing to target or integrate newly synthesized components of this structure.

Indexed as

Escherichia coli ProteinsBacterial Outer Membrane ProteinsBacterial ProteinsCell MembraneEscherichia coliMutationBacterial Outer Membrane ProteinsBacterial ProteinsEscherichia coli ProteinstolA protein, E coli

Identifiers

PMID9733690
PMCPMC107512
OpenAlexW2102948971

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.