Evidence map›Paper›PMID 17616585›Full record

ArticleJournal of bacteriology2007

Regulation of gbpC expression in Streptococcus mutans.

Indranil Biswas, Laura Drake, Saswati Biswas

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
3.8field-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

47 citing papers in PubMed, 72 citations in OpenAlex.

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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

3 authors at 1 institution in 1 country.

Indranil BiswasBasic Biomedical Sciences, University of South Dakota, Lee Medical Building, 414 E. Clark Street, Vermillion, SD 57069, USA. ibiswas@usd.edu
Laura Drake
Saswati Biswas
University of South Dakota · US

Funding

WESTCORE DNA SEQUENCING AND GENOTYPING CORE FACILITYP20RR016479 · NCRR · UNIVERSITY OF SOUTH DAKOTA · PI EICHLER, BARRETT · 2001 to 2011
$32.2M
Mechanisms of Virulence Gene Regulation in Streptococcus mutansR01DE016686 · NIDCR · UNIVERSITY OF SOUTH DAKOTA · PI BISWAS, INDRANIL · 2007 to 2011
$1.2M
Expression of Cell Surface Proteins in Streptococcus mutansR21DE016056 · NIDCR · UNIVERSITY OF SOUTH DAKOTA · PI BISWAS, INDRANIL · 2006 to 2007
$367k
NCRR NIH HHS 2 P20 RR016479NCRR NIH HHS P20 RR016479NIDCR NIH HHS DE016056NIDCR NIH HHS DE016686NIDCR NIH HHS R01 DE016686NIDCR NIH HHS R21 DE016056
6 · The paper itself

Abstract

Streptococcus mutans, the principal causative agent of dental caries, produces four glucan-binding proteins (Gbp) that play major roles in bacterial adherence and pathogenesis. One of these proteins, GbpC, is an important cell surface protein involved in biofilm formation. GbpC is also important for cariogenesis, bacteremia, and infective endocarditis. In this study, we examined the regulation of gbpC expression in S. mutans strain UA159. We found that gbpC expression attains the maximum level at mid-exponential growth phase, and the half-life of the transcript is less than 2 min. Expression from PgbpC was measured using a PgbpC-gusA transcriptional fusion reporter and was analyzed under various stress conditions, including thermal, osmotic, and acid stresses. Expression of gbpC is induced under conditions of thermal stress but is repressed during growth at low pH, whereas osmotic stress had no effect on expression from PgbpC. The results from the expression analyses were further confirmed using semiquantitative reverse transcription-PCR analysis. Our results also reveal that CovR, a global response regulator in many Streptococcus spp., represses gbpC expression at the transcriptional level. We demonstrated that purified CovR protein binds directly to the promoter region of PgbpC to repress gbpC expression. Using a DNase I protection assay, we showed that CovR binds to DNA sequences surrounding PgbpC from bases -68 to 28 (where base 1 is the start of transcription). In summary, our results indicate that various stress conditions modulate the expression of gbpC and that CovR negatively regulates the expression of the gbpC gene by directly binding to the promoter region.

Indexed as

Gene Expression Regulation, BacterialBacterial ProteinsBase SequenceCarrier ProteinsHeat-Shock ResponseHot TemperatureHydrogen-Ion ConcentrationLectinsMolecular Sequence DataOsmotic PressurePromoter Regions, GeneticRepressor ProteinsReverse Transcriptase Polymerase Chain ReactionStreptococcus mutansBacterial ProteinsCarrier Proteinsglucan-binding proteinsLectinsRepressor Proteins

Identifiers

PMID17616585
PMCPMC2045159
OpenAlexW2122194490

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.