Evidence map›Paper›PMID 27657187›Full record

ArticleGut microbes2016

The synthesis of OspD3 (ShET2) in Shigella flexneri is independent of OspC1.

Christina S Faherty, Tao Wu, Carolyn R Morris, Christen L Grassel, David A Rasko, Jill M Harper, Terez Shea-Donohue, Alessio Fasano, Eileen M Barry

Open access · goldAbstract read
In one paragraph

Article in Gut microbes, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.7field-weighted citation impact, top 16% 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

9 citing papers in PubMed, 15 citations in OpenAlex.

  1. Epithelial Cell Infection Analyses with Shigella.Journal of visualized experiments : JoVE · 2024
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. mSphere · 2019
    Article
  7. Article
  8. Article
  9. How Do the Virulence Factors ofFrontiers in cellular and infection microbiology · 2017
    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

9 authors at 2 institutions in 1 country.

Christina S Fahertya Department of Medicine, Center for Vaccine Development , University of Maryland School of Medicine , Baltimore , Maryland.
Tao Wua Department of Medicine, Center for Vaccine Development , University of Maryland School of Medicine , Baltimore , Maryland.
Carolyn R Morrisa Department of Medicine, Center for Vaccine Development , University of Maryland School of Medicine , Baltimore , Maryland.
Christen L Grassela Department of Medicine, Center for Vaccine Development , University of Maryland School of Medicine , Baltimore , Maryland.
David A Raskoc Department of Microbiology and Immunology , Institute for Genome Sciences, University of Maryland School of Medicine , Baltimore , Maryland.
Jill M Harperd Department of Medicine, Mucosal Biology Research Center , University of Maryland School of Medicine , Baltimore , Maryland.
Terez Shea-Donohued Department of Medicine, Mucosal Biology Research Center , University of Maryland School of Medicine , Baltimore , Maryland.
Alessio Fasanob Department of Pediatrics, Mucosal Immunology and Biology Research Center , Massachusetts General Hospital , Boston , Massachusetts.
Eileen M Barrya Department of Medicine, Center for Vaccine Development , University of Maryland School of Medicine , Baltimore , Maryland.
University of Maryland, Baltimore · USMassachusetts General Hospital · US

Funding

Severe Enteric Disease: Pathogenesis and ResponseU19AI090873 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI BOWER, DONNA ADAMS · 2010 to 2014
$7.2M
GI Nematodes and Gut Functional Responses to InflammationR01AI049316 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI SHEA-DONOHUE, TEREZ · 2002 to 2012
$3.6M
IMMUNITY AND INFECTIONT32AI007540 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI KAPER, JAMES B · 1998 to 2018
$2.2M
Shigella dysenteriae vaccine constructionR01AI059223 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI BARRY, EILEEN M. · 2006 to 2009
$1.4M
Mechanisms of cervical thymus developmentR21AI075244 · NIAID · UNIVERSITY OF GEORGIA · PI MANLEY, NANCY R · 2007 to 2008
$401k
NIAID NIH HHS R01 AI049316NIAID NIH HHS R01 AI059223NIAID NIH HHS R21 AI075244NIAID NIH HHS T32 AI007540NIAID NIH HHS U19 AI090873
6 · The paper itself

Abstract

Shigella flexneri is a Gram-negative pathogen that invades the colonic epithelium and causes millions of cases of watery diarrhea or bacillary dysentery predominately in children under the age of 5 years in developing countries. The effector Shigella enterotoxin 2 (ShET2), or OspD3, is encoded by the sen or ospD3 gene on the virulence plasmid. Previous literature has suggested that ospD3 is in an operon downstream of the ospC1 gene, and expression of both genes is controlled by a promoter upstream of ospC1. Since the intergenic region is 328 bases in length and contains several putative promoter regions, we hypothesized the genes are independently expressed. Here we provide data that ospD3 and ospC1 are not co-transcribed and that OspC1 is not required for OspD3/ShET2 function. Most importantly, we identified strong promoter activity in the intergenic region and demonstrate that OspD3/ShET2 can be expressed and secreted independently of OspC1. This work increases our understanding of the synthesis of a unique virulence factor and provides further insights into Shigella pathogenesis.

Indexed as

Gene Expression Regulation, BacterialBacterial ProteinsDysentery, BacillaryHumansPlasmidsPromoter Regions, GeneticShigella flexneriVirulence FactorsBacterial ProteinsVirulence FactorsenterotoxinOspC1OspD3ShET2Shigella flexneritype-III secretion system

Identifiers

PMID27657187
PMCPMC5103656
OpenAlexW2521542931

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.