Evidence map›Paper›PMID 23852867›Full record

ArticleJournal of bacteriology2013

Synthetic effect between envelope stress and lack of outer membrane vesicle production in Escherichia coli.

Carmen Schwechheimer, Meta J Kuehn

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

67 citing papers in PubMed, 119 citations in OpenAlex.

  1. Article
  2. Review
  3. Review
  4. Review
  5. Article
  6. Review
  7. Frontiers in bacterial outer membrane vesicles: From basic characteristics to cancer therapy.Chinese journal of cancer research = Chung-kuo yen cheng yen chiu · 2026
    Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Functional Cargo in Membrane Vesicles From a Citrus Pathogen.Environmental microbiology reports · 2025
    Article
  13. Article
  14. Review
  15. Review
  16. Article
  17. Article
  18. Review
  19. Review
  20. Article

7 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

2 authors at 2 institutions in 1 country.

Carmen SchwechheimerDepartment of Biochemistry, Duke University Medical Center, Durham, NC, USA.
Meta J Kuehn
Duke University · USDuke University Hospital · US

Funding

Triggers and Consequences of Bacterial Envelope StressR01GM099471 · NIGMS · DUKE UNIVERSITY · PI KUEHN, META J · 2012 to 2015
$1.1M
Biogenesis and Function of Bacterial Outer Membrane VesiclesR01AI079068 · NIAID · DUKE UNIVERSITY · PI KUEHN, META J · 2009 to 2010
$750k
NIAID NIH HHS R01 AI079068NIAID NIH HHS R01AI079068NIGMS NIH HHS R01 GM099471NIGMS NIH HHS R01GM099471
6 · The paper itself

Abstract

Outer membrane vesicles (OMVs) are composed of outer membrane and periplasmic components and are ubiquitously secreted by Gram-negative bacteria. OMVs can disseminate virulence factors for pathogenic bacteria as well as serve as an envelope stress response. From a transposon mutant screen for OMV phenotypes, it was discovered that an nlpA mutant of Escherichia coli produces fewer OMVs than the wild type, whereas a degP mutant produces higher levels of OMVs. NlpA is an inner-membrane-anchored lipoprotein that has a minor role in methionine import. DegP is a periplasmic chaperone/protease for misfolded envelope proteins that is critical when cells are heat shocked. To reveal how these proteins contribute to OMV production, the mutations were combined and the double mutant analyzed. The ΔnlpA ΔdegP strain displayed a high-temperature growth defect that corresponded to the production of fewer OMVs than produced by the ΔdegP strain. This phenotype also pertained to other undervesiculation mutations in a ΔdegP background. The hypovesiculation phenotype of ΔnlpA in the wild-type strain as well as in the degP deletion strain was found to be a stationary-phase phenomenon. The periplasm of the ΔnlpA ΔdegP strain was determined to contain significantly more protein in stationary phase than the wild type. Additionally, misfolded DegP substrate outer membrane porins were detected in ΔdegP mutant-derived OMVs. These data suggest that an accumulation of envelope proteins resulting from decreased vesiculation was toxic and contributed to the growth defect. We conclude that OMV production contributes to relieve the envelope of accumulated toxic proteins and that NlpA plays an important role in the production of vesicles in stationary phase.

Indexed as

Heat-Shock ResponseBacterial Outer Membrane ProteinsCell MembraneEscherichia coliEscherichia coli ProteinsExosomesHeat-Shock ProteinsLipoproteinsMolecular ChaperonesPeriplasmPeriplasmic ProteinsSerine EndopeptidasesBacterial Outer Membrane ProteinsDegP proteaseEscherichia coli ProteinsHeat-Shock ProteinsLipoproteinsMolecular ChaperonesPeriplasmic ProteinsSerine Endopeptidases

Identifiers

PMID23852867
PMCPMC3754735
OpenAlexW2019537934

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.