Evidence map›Paper›PMID 23331966›Full record

ArticleMalaria journal2013

Cryo-electron tomography reveals four-membrane architecture of the Plasmodium apicoplast.

Leandro Lemgruber, Mikhail Kudryashev, Chaitali Dekiwadia, David T Riglar, Jake Baum, Henning Stahlberg, Stuart A Ralph, Friedrich Frischknecht

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
3.7field-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

28 citing papers in PubMed, 66 citations in OpenAlex.

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  9. A pyruvate transporter in the apicoplast of apicomplexan parasites.Proceedings of the National Academy of Sciences of the United States of America · 2024
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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

8 authors at 5 institutions in 3 countries.

Leandro LemgruberParasitology, Department of Infectious Diseases, University of Heidelberg Medical School, Im Neuenheimer Feld 324, Heidelberg 69120, Germany.
Mikhail Kudryashev
Chaitali Dekiwadia
David T Riglar
Jake Baum
Henning Stahlberg
Stuart A Ralph
Friedrich Frischknecht
University of Melbourne · AUUniversity of Basel · CHHeidelberg University · DEUniversity Hospital Heidelberg · DEWalter and Eliza Hall Institute of Medical Research · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe apicoplast is a plastid organelle derived from a secondary endosymbiosis, containing biosynthetic pathways essential for the survival of apicomplexan parasites. The Toxoplasma apicoplast clearly possesses four membranes but in related Plasmodium spp. the apicoplast has variably been reported to have either three or four membranes.

methodsCryo-electron tomography was employed to image merozoites of Plasmodium falciparum and Plasmodium berghei frozen in their near-native state. Three-dimensional reconstructions revealed the number of apicoplast membranes and the association of the apicoplast with other organelles. Routine transmission electron microscopy of parasites preserved by high-pressure freezing followed by freeze substitution techniques was also used to analyse apicoplast morphology.

resultsCryo-preserved parasites showed clearly four membranes surrounding the apicoplast. A wider gap between the second and third apicoplast membranes was frequently observed. The apicoplast was found in close proximity to the nucleus and to the rhoptries. The apicoplast matrix showed ribosome-sized particles and membranous whorls.

conclusionsThe Plasmodium apicoplast possesses four membranes, as do the apicoplasts of other apicomplexan parasites. This is consistent with a four-membraned secondary endosymbiotic plastid ancestor.

Indexed as

Cryoelectron MicroscopyElectron Microscope TomographyImaging, Three-DimensionalIntracellular MembranesMerozoitesMicroscopy, Electron, TransmissionPlasmodium bergheiPlasmodium falciparumPlastids

Identifiers

PMID23331966
PMCPMC3662607
OpenAlexW2130264012

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.