Evidence map›Paper›PMID 26583926›Full record

ArticlePLoS genetics2015

Epigenetic Control of Salmonella enterica O-Antigen Chain Length: A Tradeoff between Virulence and Bacteriophage Resistance.

Ignacio Cota, María Antonia Sánchez-Romero, Sara B Hernández, M Graciela Pucciarelli, Francisco García-Del Portillo, Josep Casadesús

Abstract read
In one paragraph

Article in PLoS genetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed
–field-weighted citation impact
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

69 citing papers in PubMed.

  1. Review
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  6. Review
  7. A recombinant lysogenic bacteriophage inhibitsAntimicrobial agents and chemotherapy · 2026
    Article
  8. Article
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  10. The intestinal environment potentiates bacteriophage adaptation in response to phenotypic resistance inProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  11. Review
  12. Article
  13. Article
  14. Review
  15. microLife · 2025
    Article
  16. Evolution of a bistable genetic system in fluctuating and nonfluctuating environments.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  17. Review
  18. Article
  19. Article
  20. Article

9 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

6 authors.

Ignacio CotaDepartamento de Genética, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain.
María Antonia Sánchez-RomeroDepartamento de Genética, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain.
Sara B HernándezDepartamento de Genética, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain.
M Graciela PucciarelliCentro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain.
Francisco García-Del PortilloCentro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain.
Josep CasadesúsDepartamento de Genética, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Salmonella enterica opvAB operon is a horizontally-acquired locus that undergoes phase variation under Dam methylation control. The OpvA and OpvB proteins form intertwining ribbons in the inner membrane. Synthesis of OpvA and OpvB alters lipopolysaccharide O-antigen chain length and confers resistance to bacteriophages 9NA (Siphoviridae), Det7 (Myoviridae), and P22 (Podoviridae). These phages use the O-antigen as receptor. Because opvAB undergoes phase variation, S. enterica cultures contain subpopulations of opvABOFF and opvABON cells. In the presence of a bacteriophage that uses the O-antigen as receptor, the opvABOFF subpopulation is killed and the opvABON subpopulation is selected. Acquisition of phage resistance by phase variation of O-antigen chain length requires a payoff: opvAB expression reduces Salmonella virulence. However, phase variation permits resuscitation of the opvABOFF subpopulation as soon as phage challenge ceases. Phenotypic heterogeneity generated by opvAB phase variation thus preadapts Salmonella to survive phage challenge with a fitness cost that is transient only.

Indexed as

Genetic FitnessBacteriophagesLipopolysaccharidesO AntigensSalmonella entericaSite-Specific DNA-Methyltransferase (Adenine-Specific)VirulenceDam methyltransferaseLipopolysaccharidesO AntigensSite-Specific DNA-Methyltransferase (Adenine-Specific)

Identifiers

PMID26583926
PMCPMC4652898

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Registered trials

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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.