Evidence map›Paper›PMID 20851895›Full record

ArticleJournal of bacteriology2010

Calcium and iron regulate swarming and type III secretion in Vibrio parahaemolyticus.

Cindy J Gode-Potratz, Daniel M Chodur, Linda L McCarter

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed
3.3field-weighted citation impact, top 9% 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

70 citing papers in PubMed, 107 citations in OpenAlex.

  1. Article
  2. Article
  3. The multifunctional type VI secretion system ofApplied and environmental microbiology · 2025
    Review
  4. CalR is an activator of biofilm formation inApplied and environmental microbiology · 2025
    Article
  5. Article
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  15. Article
  16. Antimicrobial and antibiofilm activities of formylchromones againstFrontiers in cellular and infection microbiology · 2023
    Article
  17. Article
  18. Article
  19. Surface Motility Regulation ofInternational journal of molecular sciences · 2022
    Article
  20. Article

10 more citing papers are in PubMed but not listed here.

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.

Cindy J Gode-PotratzMicrobiology Department, The University of Iowa, Iowa City, IA 52242, USA.
Daniel M Chodur
Linda L McCarter
University of Iowa · US

Funding

Statisics In Microbiology, Infectious Diseases & BioinformaticsT32GM077973 · NIGMS · UNIVERSITY OF IOWA · PI CHALONER, KATHRYN · 2006 to 2010
$673k
Transcriptional profiling in V. parahaemolyticusR21AI065526 · NIAID · UNIVERSITY OF IOWA · PI MCCARTER, LINDA · 2005 to 2006
$400k
NIAID NIH HHS 5 R21 AI065526NIAID NIH HHS R21 AI065526NIGMS NIH HHS 5 T32 GM077973NIGMS NIH HHS T32 GM077973
6 · The paper itself

Abstract

Here, we probe the response to calcium during growth on a surface and show that calcium influences the transcriptome and stimulates motility and virulence of Vibrio parahaemolyticus. Swarming (but not swimming) gene expression and motility were enhanced by calcium. Calcium also elevated transcription of one of the organism's two type III secretion systems (T3SS1 but not T3SS2) and heightened cytotoxicity toward host cells in coculture. Calcium stimulation of T3SS gene expression has not been reported before, although low calcium is an inducing signal for the T3SS of many organisms. EGTA was also found to increase T3SS1 gene expression and virulence; however, this was demonstrated to be the consequence of iron rather than calcium chelation. Ectopic expression of exsA, encoding the T3SS1 AraC-type regulator, was used to define the extent of the T3SS1 regulon and verify its coincident induction by calcium and EGTA. To begin to understand the regulatory mechanisms modulating the calcium response, a calcium-repressed, LysR-type transcription factor named CalR was identified and shown to repress swarming and T3SS1 gene expression. Swarming and T3SS1 gene expression were also demonstrated to be linked by LafK, a σ(54)-dependent regulator of swarming, and additionally connected by a negative-feedback loop on the swarming regulon propagated by ExsA. Thus, calcium and iron, two ions pertinent for a marine organism and pathogen, play a signaling role with global consequences on the regulation of gene sets that are relevant for surface colonization and infection.

Indexed as

AnimalsBacterial ProteinsCalciumCell SurvivalCHO CellsCoculture TechniquesCricetinaeCricetulusGene Expression ProfilingGene Expression Regulation, BacterialIronLocomotionMembrane Transport ProteinsOligonucleotide Array Sequence AnalysisProtein TransportTranscription, GeneticBacterial ProteinsCalciumIronMembrane Transport Proteins

Identifiers

PMID20851895
PMCPMC2976450
OpenAlexW2043655134

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.