Evidence map›Paper›PMID 21320181›Full record

ArticleMolecular microbiology2011

Functional analysis of epigenetic regulation of tandem RhopH1/clag genes reveals a role in Plasmodium falciparum growth.

Christy A Comeaux, Bradley I Coleman, Amy K Bei, Nicole Whitehurst, Manoj T Duraisingh

Open access · greenAbstract read
In one paragraph

Article in Molecular microbiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
5.7field-weighted citation impact, top 4% 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

32 citing papers in PubMed, 51 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. How Malaria Parasites Acquire Nutrients From Their Host.Frontiers in cell and developmental biology · 2021
    Review
  9. Article
  10. Article
  11. Expression and Localization Profiles of Rhoptry Proteins inFrontiers in cellular and infection microbiology · 2019
    Article
  12. Article
  13. Article
  14. Malaria Epigenetics.Cold Spring Harbor perspectives in medicine · 2017
    Review
  15. Article
  16. TheeLife · 2017
    Article
  17. eLife · 2017
    Article
  18. 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 1 institution in 1 country.

Christy A ComeauxDepartment of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.
Bradley I Coleman
Amy K Bei
Nicole Whitehurst
Manoj T Duraisingh
Harvard University · US

Funding

Medical Scientist Training ProgramT32GM007753 · NIGMS · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI WALENSKY, LOREN DAVID · 1985 to 2021
$50.0M
IMMUNOLOGY AND INFECTIOUS DISEASES IN PUBLIC HEALTHT32AI007638 · NIAID · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI RUBIN, ERIC J. · 2000 to 2014
$2.2M
Erythrocyte invasion by Plasmodium falciparum merozoitesR01AI057919 · NIAID · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI DURAISINGH, MANOJ T · 2004 to 2008
$1.8M
NIAID NIH HHS R01 AI057919NIAID NIH HHS R01AI057919NIAID NIH HHS T32 AI007638NIAID NIH HHS T32 AI007638-09NIGMS NIH HHS T32 GM007753
6 · The paper itself

Abstract

The Plasmodium RhopH complex is a high molecular weight antigenic complex consisting of three subunits - RhopH1/clag, RhopH2 and RhopH3 - located in the rhoptry secretory organelles of the invasive merozoite. In Plasmodium falciparum RhopH1/clag is encoded by one of five clag genes. Two highly similar paralogous genes, clag 3.1 and clag 3.2, are mutually exclusively expressed. Here we show clonal switching from the clag 3.2 to the clag 3.1 paralogue in vitro. Chromatin immunoprecitation studies suggest that silencing of either clag 3 paralogue is associated with the enrichment of specific histone modifications associated with heterochromatin. We were able to disrupt the clag 3.2 gene, with a drug cassette inserted into the clag 3.2 locus being readily silenced in a position-dependent and sequence-independent manner. Activation of this drug cassette by drug selection results in parasites with the clag 3.1 locus silenced and lack full-length clag 3.1 or 3.2 transcripts. These clag 3-null parasites demonstrate a significant growth inhibition compared with wild-type parasites, providing the first genetic evidence for a role for these proteins in efficient parasite proliferation. Epigenetic regulation of these chromosomally proximal members of a multigene family provides a mechanism for both immune evasion and functional diversification.

Indexed as

Epigenesis, GeneticGene Expression RegulationChromatin ImmunoprecipitationGene Knockout TechniquesMutagenesis, InsertionalPlasmodium falciparumProtozoan Proteinscytoadherence-linked asexual protein 3, Plasmodium falciparumProtozoan Proteinsrhoptry associated protein, Plasmodium

Identifiers

PMID21320181
PMCPMC3622951
OpenAlexW2135515546

What OpenQuestion holds

Textmetadata
LicenceTDM
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.