Evidence map›Paper›PMID 28475612›Full record

ArticlePLoS pathogens2017

Calmodulin-like proteins localized to the conoid regulate motility and cell invasion by Toxoplasma gondii.

Shaojun Long, Kevin M Brown, Lisa L Drewry, Bryan Anthony, Isabelle Q H Phan, L David Sibley

Open access · goldAbstract read
In one paragraph

Article in PLoS pathogens, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed
8.7field-weighted citation impact, top 1% 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

65 citing papers in PubMed, 131 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Organization of Myosin H in the Apical Complex ofbioRxiv : the preprint server for biology · 2026
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  5. Assessing theBio-protocol · 2026
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  6. Atomic models of the Toxoplasma cell invasion machinery.Nature structural & molecular biology · 2026
    Article
  7. Article
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  9. Article
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  11. Article
  12. The Major Facilitator Superfamily Transporter HAP12 Is Critical inInternational journal of molecular sciences · 2025
    Article
  13. Article
  14. Expanding the CRISPR/Cas toolkit: applications in proteomics and theranostics.Frontiers in bioengineering and biotechnology · 2025
    Review
  15. Establishment of an ELISA for detecting oocyst-derivedFrontiers in veterinary science · 2025
    Article
  16. Article
  17. Article
  18. Orthologs ofMicrobiology spectrum · 2024
    Article
  19. Article
  20. Article

5 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

6 authors at 2 institutions in 1 country.

Shaojun LongDepartment of Molecular Microbiology, Washington University School of Medicine, St. Louis. Missouri, United States of America.
Kevin M BrownDepartment of Molecular Microbiology, Washington University School of Medicine, St. Louis. Missouri, United States of America.ORCID http://orcid.org/0000-0002-2939-1098
Lisa L DrewryDepartment of Molecular Microbiology, Washington University School of Medicine, St. Louis. Missouri, United States of America.
Bryan AnthonyDepartment of Molecular Microbiology, Washington University School of Medicine, St. Louis. Missouri, United States of America.
Isabelle Q H PhanThe Center for Infectious Disease Research, formerly Seattle BioMed, and Seattle Structural Genomics Center for Infectious Disease, Seattle, Washington, United States of America.ORCID http://orcid.org/0000-0001-6873-3401
L David SibleyDepartment of Molecular Microbiology, Washington University School of Medicine, St. Louis. Missouri, United States of America.ORCID http://orcid.org/0000-0001-7110-0285
Washington University in St. Louis · USCenter for Infectious Disease Research · US

Funding

PROTEIN SECRETION &INTRACELLULAR SURVIVAL BY TOXOPLASMAR01AI034036 · NIAID · WASHINGTON UNIVERSITY · PI SIBLEY, L. DAVID · 1993 to 2019
$7.9M
NIAID NIH HHS R01 AI034036
6 · The paper itself

Abstract

Toxoplasma gondii contains an expanded number of calmodulin (CaM)-like proteins whose functions are poorly understood. Using a combination of CRISPR/Cas9-mediated gene editing and a plant-like auxin-induced degron (AID) system, we examined the roles of three apically localized CaMs. CaM1 and CaM2 were individually dispensable, but loss of both resulted in a synthetic lethal phenotype. CaM3 was refractory to deletion, suggesting it is essential. Consistent with this prediction auxin-induced degradation of CaM3 blocked growth. Phenotypic analysis revealed that all three CaMs contribute to parasite motility, invasion, and egress from host cells, and that they act downstream of microneme and rhoptry secretion. Super-resolution microscopy localized all three CaMs to the conoid where they overlap with myosin H (MyoH), a motor protein that is required for invasion. Biotinylation using BirA fusions with the CaMs labeled a number of apical proteins including MyoH and its light chain MLC7, suggesting they may interact. Consistent with this hypothesis, disruption of MyoH led to degradation of CaM3, or redistribution of CaM1 and CaM2. Collectively, our findings suggest these CaMs may interact with MyoH to control motility and cell invasion.

Indexed as

Models, MolecularCalmodulinCell MovementCytoskeletonGene Knockout TechniquesHost-Parasite InteractionsMass SpectrometryMyosinsOrganisms, Genetically ModifiedProtozoan ProteinsToxoplasmaToxoplasmosisCalmodulinMyosinsProtozoan Proteins

Identifiers

PMID28475612
PMCPMC5435356
OpenAlexW2610893454

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.