Evidence map›Paper›PMID 15866928›Full record

ArticleJournal of bacteriology2005

CrgA is an inducible LysR-type regulator of Neisseria meningitidis, acting both as a repressor and as an activator of gene transcription.

Raffaele Ieva, Cristina Alaimo, Isabel Delany, Gunther Spohn, Rino Rappuoli, Vincenzo Scarlato

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
2.3field-weighted citation impact, top 13% 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

31 citing papers in PubMed, 55 citations in OpenAlex.

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  10. TheFrontiers in immunology · 2019
    Article
  11. Regulation of capsule in Neisseria meningitidis.Critical reviews in microbiology · 2016
    Review
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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 at 1 institution in 1 country.

Raffaele IevaBiochemistry and Molecular Biology Unit, Chiron Vaccines, 53100 Siena, Italy.
Cristina Alaimo
Isabel Delany
Gunther Spohn
Rino Rappuoli
Vincenzo Scarlato
University of Bologna · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The crgA gene of Neisseria meningitidis, which codes for a LysR-type regulator, is divergently oriented with respect to the mdaB gene, which codes for a hypothetical NADPH-quinone oxidoreductase. Transcriptional studies of the intergenic region between crgA and mdaB showed that two overlapping and divergent promoters, P(crgA) and P(mdaB), control transcription of these genes. Deletion of the crgA gene led to a strong increase in transcription from the P(crgA) promoter and a concomitant strong decrease in transcription from the P(mdaB) promoter, indicating that CrgA acts both as an autorepressor of transcription at its own promoter and as an activator of transcription at the mdaB promoter. Addition of alpha-methylene-gamma-butyrolactone (MBL), an inducer of NADPH-quinone oxidoreductase, to wild-type N. meningitidis cells specifically resulted in further activation of transcription of the P(mdaB) promoter and more repression of transcription of the P(crgA) promoter. No such regulation was observed when MBL was added to crgA-deficient cells, indicating that the transcriptional response to MBL is CrgA mediated. Under the same experimental conditions, no regulation of transcription by either CrgA or MBL was detected at the pilus and capsule genes. The role of CrgA in the regulation of gene expression during the infectious cycle of N. meningitidis is discussed.

Indexed as

Gene Expression Regulation, Bacterial4-ButyrolactoneBacterial CapsulesBacterial ProteinsBase SequenceFimbriae, BacterialGenetic Complementation TestMolecular Sequence DataNAD(P)H Dehydrogenase (Quinone)Neisseria meningitidisPromoter Regions, GeneticTranscriptional ActivationTranscription Factors4-Butyrolactonealpha-methylene gamma-butyrolactoneBacterial ProteinsCrgA protein, Neisseria meningitidisLysR protein, BacteriaNAD(P)H Dehydrogenase (Quinone)Transcription Factors

Identifiers

PMID15866928
PMCPMC1112005
OpenAlexW2140587514

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.