Evidence map›Paper›PMID 19450733›Full record

ArticleMolecular and biochemical parasitology2009

Plasmodium falciparum merozoite surface protein 2 is unstructured and forms amyloid-like fibrils.

Christopher G Adda, Vince J Murphy, Margaret Sunde, Lynne J Waddington, Jesse Schloegel, Gert H Talbo, Kleo Vingas, Vivian Kienzle, Rosella Masciantonio, Geoffrey J Howlett and 3 more

Abstract read
In one paragraph

Article in Molecular and biochemical parasitology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
6.9field-weighted citation impact, top 3% 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

48 citing papers in PubMed, 87 citations in OpenAlex.

  1. Trial
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  12. Inclusion of an OptimizedJournal of immunology (Baltimore, Md. : 1950) · 2021
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  14. Detection of Protein Aggregation in LiveAntimicrobial agents and chemotherapy · 2020
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  15. Article
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  17. Review
  18. Article
  19. Disordered epitopes as peptide vaccines.Peptide science (Hoboken, N.J.) · 2018
    Review
  20. Review
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

13 authors at 5 institutions in 1 country.

Christopher G AddaDepartment of Biochemistry, La Trobe University, Victoria 3086, Australia.
Vince J Murphy
Margaret Sunde
Lynne J Waddington
Jesse Schloegel
Gert H Talbo
Kleo Vingas
Vivian Kienzle
Rosella Masciantonio
Geoffrey J Howlett
Anthony N Hodder
Michael Foley
Robin F Anders
La Trobe University · AUCommonwealth Scientific and Industrial Research Organisation · AUUniversity of Melbourne · AUUniversity of Sydney · AUWalter and Eliza Hall Institute of Medical Research · AU

Funding

Inhibitory epitopes in malaria vaccine candidatesR01AI059229 · NIAID · LA TROBE UNIVERSITY · PI FOLEY, MICHAEL · 2005 to 2009
$957k
NIAID NIH HHS R01 AI059229NIAID NIH HHS R01AI59229
6 · The paper itself

Abstract

Several merozoite surface proteins are being assessed as potential components of a vaccine against Plasmodium falciparum, the cause of the most serious form of human malaria. One of these proteins, merozoite surface protein 2 (MSP2), is unusually hydrophilic and contains tandem sequence repeats, characteristics of intrinsically unstructured proteins. A range of physicochemical studies has confirmed that recombinant forms of MSP2 are largely unstructured. Both dimorphic types of MSP2 (3D7 and FC27) are equivalently extended in solution and form amyloid-like fibrils although with different kinetics and structural characteristics. These fibrils have a regular underlying beta-sheet structure and both fibril types stain with Congo Red, but only the FC27 fibrils stain with Thioflavin T. 3D7 MSP2 fibrils seeded the growth of fibrils from 3D7 or FC27 MSP2 monomer indicating the involvement of a conserved region of MSP2 in fibril formation. Consistent with this, digestion of fibrils with proteinase K generated resistant peptides, which included the N-terminal conserved region of MSP2. A monoclonal antibody that reacted preferentially with monomeric recombinant MSP2 did not react with the antigen in situ on the merozoite surface. Glutaraldehyde cross-linking of infected erythrocytes generated MSP2 oligomers similar to those formed by polymeric recombinant MSP2. We conclude that MSP2 oligomers containing intermolecular beta-strand interactions similar to those in amyloid fibrils may be a component of the fibrillar surface coat on P. falciparum merozoites.

Indexed as

Amino Acid SequenceAmyloidAnimalsAntigens, ProtozoanHumansMalaria, FalciparumMolecular Sequence DataPlasmodium falciparumProtozoan ProteinsAmyloidAntigens, Protozoanmerozoite surface protein 2, PlasmodiumProtozoan Proteins

Identifiers

PMID19450733
PMCPMC2713819
OpenAlexW2060660377

What OpenQuestion holds

Textmetadata
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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.