Evidence map›Paper›PMID 19429612›Full record

ArticleJournal of bacteriology2009

Intact flagellar motor of Borrelia burgdorferi revealed by cryo-electron tomography: evidence for stator ring curvature and rotor/C-ring assembly flexion.

Jun Liu, Tao Lin, Douglas J Botkin, Erin McCrum, Hanspeter Winkler, Steven J Norris

Abstract read
In one paragraph

Article in Journal of bacteriology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 110 papers.

0numbers the graph read from it
0cells of the map it votes in
110citing 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

110 citing papers in PubMed.

  1. TheProceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Article
  3. Article
  4. The ancient E-ring in bacterial flagellar motors.FEMS microbiology reviews · 2026
    Review
  5. Borrelia surface proteins: new horizons in Lyme disease diagnosis.Applied microbiology and biotechnology · 2025
    Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Broadly conserved FlgV controls flagellar assembly andbioRxiv : the preprint server for biology · 2024
    Article
  12. The big chill: Growth ofQRB discovery · 2024
    Review
  13. Article
  14. Article
  15. Article
  16. FliL ring enhances the function of periplasmic flagella.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  17. Article
  18. Identification of amino acid domains ofFrontiers in cellular and infection microbiology · 2022
    Article
  19. Review
  20. Article

50 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Jun LiuDepartment of Pathology and Laboratory Medicine, University of Texas Medical School at Houston, 6431 Fannin, MSB 2.228, Houston, TX 77030, USA. jun.liu.1@uth.tmc.edu
Tao Lin
Douglas J Botkin
Erin McCrum
Hanspeter Winkler
Steven J Norris

Funding

Structure-Function Relationships in the Spirochetal Flagellar MotorR01AI087946 · NIAID · YALE UNIVERSITY · PI LIU, JUN · 2010 to 2025
$6.6M
Virulence Determinants of Borrelia burgdorferiR01AI059048 · NIAID · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI NORRIS, STEVEN J. · 2004 to 2016
$5.3M
Computational methods for molecular tomographyR01GM082948 · NIGMS · FLORIDA STATE UNIVERSITY · PI WINKLER, HANSPETER · 2007 to 2011
$1.3M
Virulence Determinants of Borrelia burgdorferiR56AI059048 · NIAID · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI NORRIS, STEVEN J. · 2012 to 2012
$416k
NIAID NIH HHS AI059048NIAID NIH HHS R01 AI059048NIAID NIH HHS R01 AI087946NIAID NIH HHS R56 AI059048NIGMS NIH HHS R01 GM082948
6 · The paper itself

Abstract

The bacterial flagellar motor is a remarkable nanomachine that provides motility through flagellar rotation. Prior structural studies have revealed the stunning complexity of the purified rotor and C-ring assemblies from flagellar motors. In this study, we used high-throughput cryo-electron tomography and image analysis of intact Borrelia burgdorferi to produce a three-dimensional (3-D) model of the in situ flagellar motor without imposing rotational symmetry. Structural details of B. burgdorferi, including a layer of outer surface proteins, were clearly visible in the resulting 3-D reconstructions. By averaging the 3-D images of approximately 1,280 flagellar motors, a approximately 3.5-nm-resolution model of the stator and rotor structures was obtained. flgI transposon mutants lacked a torus-shaped structure attached to the flagellar rod, establishing the structural location of the spirochetal P ring. Treatment of intact organisms with the nonionic detergent NP-40 resulted in dissolution of the outermost portion of the motor structure and the C ring, providing insight into the in situ arrangement of the stator and rotor structures. Structural elements associated with the stator followed the curvature of the cytoplasmic membrane. The rotor and the C ring also exhibited angular flexion, resulting in a slight narrowing of both structures in the direction perpendicular to the cell axis. These results indicate an inherent flexibility in the rotor-stator interaction. The FliG switching and energizing component likely provides much of the flexibility needed to maintain the interaction between the curved stator and the relatively symmetrical rotor/C-ring assembly during flagellar rotation.

Indexed as

Bacterial ProteinsBorrelia burgdorferiCryoelectron MicroscopyDNA Transposable ElementsElectron Microscope TomographyFlagellaMutagenesisMutationOctoxynolPolyethylene GlycolsBacterial ProteinsDNA Transposable ElementsflgI protein, BacteriaNonidet P-40OctoxynolPolyethylene Glycols

Identifiers

PMID19429612
PMCPMC2725586

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.