Evidence map›Paper›PMID 19968792›Full record

ArticleMolecular microbiology2010

Differential effects and interactions of endogenous and horizontally acquired H-NS-like proteins in pathogenic Escherichia coli.

Claudia M Müller, György Schneider, Ulrich Dobrindt, Levente Emödy, Jörg Hacker, Bernt Eric Uhlin

Abstract read
In one paragraph

Article in Molecular microbiology, 2010. 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
–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

26 citing papers in PubMed.

  1. Advancing evolution: Bacteria break down gene silencer to express horizontally acquired genes.BioEssays : news and reviews in molecular, cellular and developmental biology · 2023
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  19. Structural basis for recognition of AT-rich DNA by unrelated xenogeneic silencing proteins.Proceedings of the National Academy of Sciences of the United States of America · 2011
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Claudia M MüllerDepartment of Molecular Biology, The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, Umeå, Umeå, Sweden.
György Schneider
Ulrich Dobrindt
Levente Emödy
Jörg Hacker
Bernt Eric Uhlin

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The nucleoid-associated protein H-NS is important for gene regulation in Escherichia coli. We have studied H-NS interaction with StpA and an uncharacterized H-NS-like protein, Hfp, in the uropathogenic E. coli isolate 536 that expresses all three nucleoid-associated proteins. We found distinct interactions of the three proteins at the protein level, resulting in the formation of heteromers, as well as differences in their gene expression at the transcriptional level. Mutants lacking either StpA or Hfp alone did not exhibit a phenotype at 37 degrees C, which is consistent with a low level of expression at that temperature. Expression of the hfp and stpA genes was found to be induced by apparently diametrical conditions, and StpA and Hfp levels could be correlated to modulatory effects on the expression of different H-NS targets, the bgl operon and operons for virulence factors such as fimbriae and capsular polysaccharide. The hns/hfp and hns/stpA double mutants displayed severe growth defects at low and high temperatures respectively. Our findings demonstrated different requirements for the alternative H-NS/Hfp/StpA combinations under these growth conditions. We propose that Hfp and StpA have distinct functions and roles in a dynamic pool of nucleoid-associated proteins that is adapting to requirements in a particular environment.

Indexed as

Gene Expression Regulation, BacterialAmino Acid SequenceBacterial ProteinsChromosomes, BacterialDNA-Binding ProteinsEnvironmentEscherichia coliEscherichia coli InfectionsEscherichia coli ProteinsFimbriae, BacterialFimbriae ProteinsHumansIntestinesKineticsMolecular ChaperonesMolecular Sequence DataBacterial ProteinsDNA-Binding ProteinsEscherichia coli ProteinsFimbriae ProteinsH-NS protein, bacteriaMolecular ChaperonesRepressor ProteinsStpA protein, E coli

Identifiers

PMID19968792
PMCPMC2814080

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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.