Evidence map›Paper›PMID 26821343›Full record

ArticleJournal of structural biology2016

A detailed look at the cytoskeletal architecture of the Giardia lamblia ventral disc.

Joanna R Brown, Cindi L Schwartz, John M Heumann, Scott C Dawson, Andreas Hoenger

Open access · greenAbstract read
In one paragraph

Article in Journal of structural biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
4.6field-weighted citation impact, top 6% 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

21 citing papers in PubMed, 57 citations in OpenAlex.

  1. Review
  2. Review
  3. Molecular biology of the cell · 2025
    Article
  4. Review
  5. Article
  6. Article
  7. The parabasal filaments ofJournal of structural biology: X · 2024
    Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Microtubule organelles in Giardia.Advances in parasitology · 2020
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  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 2 institutions in 1 country.

Joanna R BrownUniversity of Colorado, Dept. MCD Biology, Boulder, CO 80309, USA.
Cindi L SchwartzUniversity of Colorado, Dept. MCD Biology, Boulder, CO 80309, USA.
John M HeumannUniversity of Colorado, Dept. MCD Biology, Boulder, CO 80309, USA.
Scott C DawsonUniversity of California Davis, Dept. Microbiology and Molecular Genetics, Davis, CA 95616, USA.
Andreas HoengerUniversity of Colorado, Dept. MCD Biology, Boulder, CO 80309, USA. Electronic address: Hoenger@colorado.edu.
University of Colorado Boulder · USUniversity of California, Davis · US

Funding

WORKSHOPS AND TRAINING FOR IMAGE ANALYSIS USING IMODP41RR000592 · NCRR · UNIVERSITY OF COLORADO AT BOULDER · PI BASS, PETER W. · 1985 to 2011
$11.9M
Molecular mechanisms of attachment by the ventral disc in GiardiaR01AI077571 · NIAID · UNIVERSITY OF CALIFORNIA AT DAVIS · PI DAWSON, SCOTT C · 2009 to 2023
$5.9M
A MULTI-SCALE APPROACH TO CELL STRUCTURE & FUNCTIONP41GM103431 · NIGMS · UNIVERSITY OF COLORADO · PI HOENGER, ANDREAS · 2012 to 2014
$3.1M
NCRR NIH HHS P41 RR000592NCRR NIH HHS P41RR000592NIAID NIH HHS R01 AI077571NIGMS NIH HHS P41 GM103431NIGMS NIH HHS P41GM103431-43NIGMS NIH HHS P41GM103431-43S1
6 · The paper itself

Abstract

Giardia lamblia is a protistan parasite that infects and colonizes the small intestine of mammals. It is widespread and particularly endemic in the developing world. Here we present a detailed structural study by 3-D negative staining and cryo-electron tomography of a unique Giardia organelle, the ventral disc. The disc is composed of a regular array of microtubules and associated sheets, called microribbons that form a large spiral, held together by a myriad of mostly unknown associated proteins. In a previous study we analyzed by cryo-electron tomography the central microtubule portion (here called disc body) of the ventral disc and found a large portion of microtubule associated inner (MIPs) and outer proteins (MAPs) that render these microtubules hyper-stable. With this follow-up study we expanded our 3-D analysis to different parts of the disc such as the ventral and dorsal areas of the overlap zone, as well as the outer disc margin. There are intrinsic location-specific characteristics in the composition of microtubule-associated proteins between these regions, as well as large differences between the overall architecture of microtubules and microribbons. The lateral packing of microtubule-microribbon complexes varies substantially, and closer packing often comes with contracted lateral tethers that seem to hold the disc together. It appears that the marginal microtubule-microribbon complexes function as outer, laterally contractible lids that may help the cell to clamp onto the intestinal microvilli. Furthermore, we analyzed length, quantity, curvature and distribution between different zones of the disc, which we found to differ from previous publications.

Indexed as

AnimalsCryoelectron MicroscopyCytoskeletonElectron Microscope TomographyGiardia lambliaGiardiasisHost-Parasite InteractionsImaging, Three-DimensionalIntestinesMicrotubulesMicrovilliTrophozoitesCryo-electron microscopyCryo-electron tomographyGiardia lamblia ventral discMicrotubule-associated proteins (MAPs)MicrotubulesVolume averaging

Identifiers

PMID26821343
PMCPMC4764415
OpenAlexW2250545977

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.