Evidence map›Paper›PMID 22923593›Full record

ArticleJournal of bacteriology2012

Functional characterization of the RNA chaperone Hfq in the opportunistic human pathogen Stenotrophomonas maltophilia.

Emanuela Roscetto, Tiziana Angrisano, Valerio Costa, Mariassunta Casalino, Konrad U Förstner, Cynthia M Sharma, Pier Paolo Di Nocera, Eliana De Gregorio

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

19 citing papers in PubMed, 30 citations in OpenAlex.

  1. Frontiers in microbiology · 2026
    Article
  2. Comparative genomics analysis ofFrontiers in cellular and infection microbiology · 2023
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  15. Mechanisms of post-transcriptional gene regulation in bacterial biofilms.Frontiers in cellular and infection microbiology · 2014
    Review
  16. Review
  17. Article
  18. Identifying and characterizing Hfq-RNA interactions.Methods (San Diego, Calif.) · 2013
    Review
  19. Article
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

8 authors at 4 institutions in 2 countries.

Emanuela RoscettoDipartimento di Biologia e Patologia Cellulare e Molecolare, Università Federico II, Naples, Italy.
Tiziana Angrisano
Valerio Costa
Mariassunta Casalino
Konrad U Förstner
Cynthia M Sharma
Pier Paolo Di Nocera
Eliana De Gregorio
University of Naples Federico II · ITUniversity of Würzburg · DEInstitute of Genetics and Biophysics · ITRoma Tre University · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hfq is an RNA-binding protein known to regulate a variety of cellular processes by interacting with small RNAs (sRNAs) and mRNAs in prokaryotes. Stenotrophomonas maltophilia is an important opportunistic pathogen affecting primarily hospitalized and immunocompromised hosts. We constructed an hfq deletion mutant (Δhfq) of S. maltophilia and compared the behaviors of wild-type and Δhfq S. maltophilia cells in a variety of assays. This revealed that S. maltophilia Hfq plays a role in biofilm formation and cell motility, as well as susceptibility to antimicrobial agents. Moreover, Hfq is crucial for adhesion to bronchial epithelial cells and is required for the replication of S. maltophilia in macrophages. Differential RNA sequencing analysis (dRNA-seq) of RNA isolated from S. maltophilia wild-type and Δhfq strains showed that Hfq regulates the expression of genes encoding flagellar and fimbrial components, transmembrane proteins, and enzymes involved in different metabolic pathways. Moreover, we analyzed the expression of several sRNAs identified by dRNA-seq in wild-type and Δhfq S. maltophilia cells grown in different conditions on Northern blots. The accumulation of two sRNAs was strongly reduced in the absence of Hfq. Furthermore, based on our dRNA-seq analysis we provide a genome-wide map of transcriptional start sites in S. maltophilia.

Indexed as

Amino Acid SequenceAnimalsAnti-Bacterial AgentsBacterial AdhesionBiofilmsEpithelial CellsGene DeletionGene Expression Regulation, BacterialHost Factor 1 ProteinHumansLocomotionMacrophagesMiceMicrobial Sensitivity TestsMolecular ChaperonesMolecular Sequence DataAnti-Bacterial AgentsHost Factor 1 ProteinMolecular ChaperonesRNA, Bacterial

Identifiers

PMID22923593
PMCPMC3486118
OpenAlexW2124326153

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.