Evidence map›Paper›PMID 16552055›Full record

ArticleInfection and immunity2006

Identification of a two-partner secretion locus of enterotoxigenic Escherichia coli.

James M Fleckenstein, Koushik Roy, Julia F Fischer, Michael Burkitt

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
3.3field-weighted citation impact, top 8% 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

81 citing papers in PubMed, 116 citations in OpenAlex.

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  11. Transposon mutagenesis of atypical enteroaggregativeFrontiers in cellular and infection microbiology · 2023
    Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. Article
  17. Confronting challenges to enterotoxigenicFrontiers in tropical diseases · 2021
    Article
  18. Review
  19. Article
  20. Article

21 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

4 authors at 2 institutions in 1 country.

James M FleckensteinMedicine Service (151), Veterans Affairs Medical Center, 1030 Jefferson Avenue, Memphis, TN 38104, USA. jflecke1@tennessee.edu
Koushik Roy
Julia F Fischer
Michael Burkitt
Indiana University School of MedicineUniversity of Tennessee Health Science Center · US

Funding

Short-Term Research Training for Medical StudentsT35DK007405 · NIDDK · UNIVERSITY OF TENNESSEE HEALTH SCI CTR · PI SOLOMON, SOLOMON SIDNEY · 1990 to 2014
$1.8M
PATHOGENESIS OF ETEC INFECTIONSK23RR016190 · NCRR · UNIVERSITY OF TENNESSEE HEALTH SCI CTR · PI FLECKENSTEIN, JAMES MICHAEL · 2001 to 2005
$799k
NCRR NIH HHS K23 RR016190NCRR NIH HHS RR16190-04NIDDK NIH HHS T32 DK07405NIDDK NIH HHS T35 DK007405
6 · The paper itself

Abstract

Enterotoxigenic Escherichia coli (ETEC) remains a formidable cause of diarrheal illness worldwide. At present, there is no vaccine that provides broad-based protection against ETEC. A 'phoA-based self-cloning mutagenesis system, TnphoA.ts, employed to identify novel ETEC surface antigens, led to identification of an ETEC two-partner secretion locus (etpBAC) on the pCS1 virulence plasmid of prototype strain H10407. Cloning and expression of etpBAC in recombinant E. coli LMG194(pJY019) resulted in secretion of a high-molecular-weight (HMW) glycosylated exoprotein. This glycoprotein, EtpA, exhibits linear peptide sequence and predicted structural homologies with known HMW adhesins produced by other two-partner secretion loci. Antibodies directed against recombinant EtpA (anti-rEtpA.6H) recognized an HMW protein in culture supernatants of ETEC strains H10407 and LMG194(pJY019) but not in culture supernatant of strain H10407-P, which lacks the 92-kb pCS1 plasmid, or an isogenic etpA mutant. etpA mutants were deficient in adherence to intestinal epithelial cells in vitro, and anti-rEtpA.6H antibodies inhibited association of H10407 with target epithelial cells. Cloning and expression of etpB in recombinant E. coli were sufficient to confer adherence. Screening of multiple ETEC isolates for the etpBAC locus by colony hybridization and by EtpA immunoblotting suggested that EtpA is one of the most common antigens secreted by these pathogens. Together, these results indicate that the newly identified ETEC two-partner secretion locus directs the secretion of a high-molecular-weight glycosylated protein, EtpA, that in concert with the putative EtpB transporter participates in adherence of H10407 to epithelial cells, thereby expanding the repertoire of potential ETEC virulence proteins and vaccine candidates.

Indexed as

Adhesins, Escherichia coliAntigens, BacterialBacterial AdhesionBacterial Outer Membrane ProteinsCaco-2 CellsEscherichia coliEscherichia coli ProteinsGenetic MarkersGlycoproteinsGlycosylationHumansIntestinal MucosaMembrane GlycoproteinsMembrane Transport ProteinsMolecular Sequence DataOperonAdhesins, Escherichia coliAntigens, BacterialBacterial Outer Membrane ProteinsEscherichia coli ProteinsEtpA protein, E coliEtpB protein, E coliEtpC protein, E coliGenetic MarkersGlycoproteinsMembrane GlycoproteinsMembrane Transport ProteinsVirulence Factors

Identifiers

PMID16552055
PMCPMC1418895
OpenAlexW2120109350

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.