Evidence map›Paper›PMID 21784935›Full record

ArticleJournal of bacteriology2011

The fimbrial usher FimD follows the SurA-BamB pathway for its assembly in the outer membrane of Escherichia coli.

Carmen Palomino, Elvira Marín, Luis Ángel Fernández

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

26 citing papers in PubMed, 45 citations in OpenAlex.

  1. Article
  2. Bioinformatics and immunoinformatics assisted multiepitope vaccine construct againstSaudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2024
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  6. Construction of a Lectin-Glycan Interaction Network from EnterohemorrhagicInternational journal of molecular sciences · 2020
    Article
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  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. The adaptation ofNPJ microgravity · 2017
    Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. A combined kinetic push and thermodynamic pull as driving forces for outer membrane protein sorting and folding in bacteria.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2015
    Review
  19. Review
  20. 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

3 authors at 2 institutions in 1 country.

Carmen PalominoDepartment of Microbial Biotechnology, Centro Nacional de Biotecnología, CNB-CSIC, Campus de Cantoblanco UAM, Darwin 3, Madrid 28049, Spain.
Elvira Marín
Luis Ángel Fernández
Universidad Autónoma de Madrid · ESConsejo Superior de Investigaciones Científicas · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fimbrial ushers are the largest β-barrel outer membrane proteins (OMPs) known to date, which function in the polymerization of fimbriae and their translocation to the bacterial surface. Folding and assembly of these complex OMPs are not characterized. Here, we investigate the role of periplasmic chaperones (SurA, Skp, DegP, and FkpA) and individual components of the β-barrel assembly machinery (BAM) complex (BamA, BamB, BamC, and BamE) in the folding of the Escherichia coli FimD usher. The FimD level is dramatically reduced (∼30-fold) in a surA null mutant, but a strong cell envelope stress is constitutively activated with upregulation of DegP (∼10-fold). To demonstrate a direct role of SurA, FimD folding was analyzed in a conditional surA mutant in which SurA expression was controlled. In this strain, FimD is depleted from bacteria in parallel to SurA without significant upregulation of DegP. Interestingly, the dependency on SurA is higher for FimD than for other OMPs. We also demonstrate that a functional BAM complex is needed for folding of FimD. In addition, FimD levels were strongly reduced (∼5-fold) in a mutant lacking the accessory lipoprotein BamB. The critical role of BamB for FimD folding was confirmed by complementation and BamB depletion experiments. Similar to SurA dependency, FimD showed a stronger dependency on BamB than OMPs. On the other hand, folding of FimD was only marginally affected in bamC and bamE mutants. Collectively, our results indicate that FimD usher follows the SurA-BamB pathway for its assembly. The preferential use of this pathway for the folding of OMPs with large β-barrels is discussed.

Indexed as

Bacterial Outer Membrane ProteinsBlotting, WesternCarrier ProteinsDNA-Binding ProteinsEscherichia coliEscherichia coli ProteinsFimbriae ProteinsHeat-Shock ProteinsLipid-Linked ProteinsMembrane ProteinsMolecular ChaperonesPeptidylprolyl IsomerasePeriplasmic ProteinsProtein BindingProtein FoldingSerine EndopeptidasesBacterial Outer Membrane ProteinsBamA protein, E coliBamB protein, E coliBamC protein, E coliCarrier ProteinsDegP proteaseDNA-Binding ProteinsEscherichia coli ProteinsFimbriae ProteinsfimD protein, E coliFkpA protein, E coliHeat-Shock ProteinsLipid-Linked ProteinsMembrane ProteinsMolecular ChaperonesPeptidylprolyl IsomerasePeriplasmic ProteinsSerine EndopeptidasesSkp protein, E coliSurA protein, E coli

Identifiers

PMID21784935
PMCPMC3187399
OpenAlexW2071023701

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.