Evidence map›Paper›PMID 27110662›Full record

ArticleCellular microbiology2016

Surface proteins, ERAD and antigenic variation in Trypanosoma brucei.

Calvin Tiengwe, Katherine A Muratore, James D Bangs

Abstract read
In one paragraph

Article in Cellular microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–field-weighted citation impact
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

23 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. To the Surface and Back: Exo- and Endocytic Pathways inFrontiers in cell and developmental biology · 2021
    Review
  13. Article
  14. Effect of Praziquantel onPathogens (Basel, Switzerland) · 2020
    Article
  15. Article
  16. Review
  17. Article
  18. Evolution of Antigenic Variation in African Trypanosomes: Variant Surface Glycoprotein Expression, Structure, and Function.BioEssays : news and reviews in molecular, cellular and developmental biology · 2018
    Review
  19. Article
  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

3 authors.

Calvin TiengweDepartment of Microbiology and Immunology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo (SUNY), Buffalo, NY, 14214, USA.
Katherine A MuratoreBiochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis-St. Paul, MN, 55455, USA.
James D BangsDepartment of Microbiology and Immunology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo (SUNY), Buffalo, NY, 14214, USA. jdbangs@buffalo.edu.

Funding

Secretory Protein Trafficking and Folding in African TrypanosomesR01AI035739 · NIAID · UNIVERSITY OF WISCONSIN-MADISON · PI BANGS, JAMES D. · 2000 to 2020
$6.6M
NIAID NIH HHS R01 AI035739
6 · The paper itself

Abstract

Variant surface glycoprotein (VSG) is central to antigenic variation in African trypanosomes. Although much prior work documents that VSG is efficiently synthesized and exported to the cell surface, it was recently claimed that 2-3 fold more is synthesized than required, the excess being eliminated by ER-Associated Degradation (ERAD) (Field et al., ). We now reinvestigate VSG turnover and find no evidence for rapid degradation, consistent with a model whereby VSG synthesis is precisely regulated to match requirements for a functional surface coat on each daughter cell. However, using a mutated version of the ESAG7 subunit of the transferrin receptor (E7:Ty) we confirm functional ERAD in trypanosomes. E7:Ty fails to assemble into transferrin receptors and accumulates in the ER, consistent with retention of misfolded protein, and its turnover is selectively rescued by the proteasomal inhibitor MG132. We also show that ER accumulation of E7:Ty does not induce an unfolded protein response. These data, along with the presence of ERAD orthologues in the Trypanosoma brucei genome, confirm ERAD in trypanosomes. We discuss scenarios in which ERAD could be critical to bloodstream parasites, and how these may have contributed to the evolution of antigenic variation in trypanosomes.

Indexed as

Endoplasmic Reticulum-Associated DegradationAntigens, ProtozoanProtein FoldingProtein StabilityProteolysisTrypanosoma brucei bruceiVariant Surface Glycoproteins, TrypanosomaAntigens, ProtozoanVariant Surface Glycoproteins, Trypanosoma

Identifiers

PMID27110662
PMCPMC5575760

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Registered trials

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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.