Evidence map›Paper›PMID 19376852›Full record

ArticleJournal of bacteriology2009

Role of the extracytoplasmic function sigma factor RpoE4 in oxidative and osmotic stress responses in Rhizobium etli.

Jaime M Martínez-Salazar, Emmanuel Salazar, Sergio Encarnación, Miguel A Ramírez-Romero, Javier Rivera

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2009. 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
5.1field-weighted citation impact, top 5% 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

26 citing papers in PubMed, 52 citations in OpenAlex.

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  10. Transcriptomic Changes inInternational journal of molecular sciences · 2019
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  11. The XRE Family Transcriptional Regulator SrtR inFrontiers in cellular and infection microbiology · 2018
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  12. Review
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  15. Article
  16. Article
  17. Review
  18. Complex two-component signaling regulates the general stress response in Alphaproteobacteria.Proceedings of the National Academy of Sciences of the United States of America · 2014
    Article
  19. Article
  20. 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

5 authors at 3 institutions in 2 countries.

Jaime M Martínez-SalazarPrograma de Ingeniería Genómica, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico. jaime@ccg.unam.mx
Emmanuel Salazar
Sergio Encarnación
Miguel A Ramírez-Romero
Javier Rivera
Instituto de Biología Funcional y Genómica · ESInstituto de Medicina Genómica · ESUniversidad Nacional Autónoma de México · MX

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The aims of this study were to functionally characterize and analyze the transcriptional regulation and transcriptome of the Rhizobium etli rpoE4 gene. An R. etli rpoE4 mutant was sensitive to oxidative, saline, and osmotic stresses. Using transcriptional fusions, we determined that RpoE4 controls its own transcription and that it is negatively regulated by rseF (regulator of sigma rpoE4; CH03274), which is cotranscribed with rpoE4. rpoE4 expression was induced not only after oxidative, saline, and osmotic shocks, but also under microaerobic and stationary-phase growth conditions. The transcriptome analyses of an rpoE4 mutant and an rpoE4-overexpressing strain revealed that the RpoE4 extracytoplasmic function sigma factor regulates about 98 genes; 50 of them have the rpoE4 promoter motifs in the upstream regulatory regions. Interestingly, 16 of 38 genes upregulated in the rpoE4-overexpressing strain encode unknown putative cell envelope proteins. Other genes controlled by RpoE4 include rpoH2, CH00462, CH02434, CH03474, and xthA1, which encode proteins involved in the stress response (a heat shock sigma factor, a putative Mn-catalase, an alkylation DNA repair protein, pyridoxine phosphate oxidase, and exonuclease III, respectively), as well as several genes, such as CH01253, CH03555, and PF00247, encoding putative proteins involved in cell envelope biogenesis (a putative peptidoglycan binding protein, a cell wall degradation protein, and phospholipase D, respectively). These results suggest that rpoE4 has a relevant function in cell envelope biogenesis and that it plays a role as a general regulator in the responses to several kinds of stress.

Indexed as

Bacterial ProteinsBase SequenceFabaceaeGene Expression Regulation, BacterialMolecular Sequence DataOligonucleotide Array Sequence AnalysisOsmotic PressureOxidative StressPhenotypeReverse Transcriptase Polymerase Chain ReactionRhizobium etliSequence Homology, Nucleic AcidSigma FactorBacterial ProteinsSigma Factor

Identifiers

PMID19376852
PMCPMC2698498
OpenAlexW2161913658

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.