Evidence map›Paper›PMID 16778769›Full record

ArticleThe EMBO journal2006

Toxoplasma gondii scavenges host-derived lipoic acid despite its de novo synthesis in the apicoplast.

Michael J Crawford, Nadine Thomsen-Zieger, Manisha Ray, Joachim Schachtner, David S Roos, Frank Seeber

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed
8.5field-weighted citation impact, top 2% 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

71 citing papers in PubMed, 152 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. The apicoplast localized isocitrate dehydrogenase is needed forFrontiers in cellular and infection microbiology · 2025
    Article
  9. Article
  10. Host-Parasite Interactions inInternational journal of molecular sciences · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Review
  19. Article
  20. Article

11 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 2 countries.

Michael J CrawfordDepartment of Biology, University of Pennsylvania, Philadelphia, USA.
Nadine Thomsen-Zieger
Manisha Ray
Joachim Schachtner
David S Roos
Frank Seeber
Philipps University of Marburg · DEUniversity of Pennsylvania · US

Funding

Production of New Adenovector Constructs with Fiber-Shaft ModificationsZ01AI005093 · NIAID · NIAID EXTRAMURAL ACTIVITIES · PI WALLACE, KIMBERLY · 2007 to 2008
$2.7M
THE APICOPLAST--A TARGET FOR PARASITICIDAL CHEMOTHERAPYF32AI010482 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI CRAWFORD, MICHAEL J · 2000 to 2002
$119k
NIAID NIH HHS AI05093NIAID NIH HHS F32 AI010482Wellcome Trust
6 · The paper itself

Abstract

In contrast to other eukaryotes, which manufacture lipoic acid, an essential cofactor for several vital dehydrogenase complexes, within the mitochondrion, we show that the plastid (apicoplast) of the obligate intracellular protozoan parasite Toxoplasma gondii is the only site of de novo lipoate synthesis. However, antibodies specific for protein-attached lipoate reveal the presence of lipoylated proteins in both, the apicoplast and the mitochondrion of T. gondii. Cultivation of T. gondii-infected cells in lipoate-deficient medium results in substantially reduced lipoylation of mitochondrial (but not apicoplast) proteins. Addition of exogenous lipoate to the medium can rescue this effect, showing that the parasite scavenges this cofactor from the host. Exposure of T. gondii to lipoate analogues in lipoate-deficient medium leads to growth inhibition, suggesting that T. gondii might be auxotrophic for this cofactor. Phylogenetic analyses reveal the secondary loss of the mitochondrial lipoate synthase gene after the acquisition of the plastid. Our studies thus reveal an unexpected metabolic deficiency in T. gondii and raise the question whether the close interaction of host mitochondria with the parasitophorous vacuole is connected to lipoate supply by the host.

Indexed as

AnimalsCaprylatesCell SurvivalMitochondriaOrganellesPhylogenyProtozoan ProteinsThioctic AcidToxoplasmaCaprylatesoctanoic acidProtozoan ProteinsThioctic Acid

Identifiers

PMID16778769
PMCPMC1500979
OpenAlexW2058372689

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.