Evidence map›Paper›PMID 20850455›Full record

ArticleJournal of molecular biology2010

Cellular architecture of Treponema pallidum: novel flagellum, periplasmic cone, and cell envelope as revealed by cryo electron tomography.

Jun Liu, Jerrilyn K Howell, Sherille D Bradley, Yesha Zheng, Z Hong Zhou, Steven J Norris

Abstract read
In one paragraph

Article in Journal of molecular biology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 93 papers.

0numbers the graph read from it
0cells of the map it votes in
93citing papers in PubMed
5.0field-weighted citation impact, top 4% 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

93 citing papers in PubMed, 149 citations in OpenAlex.

  1. Review
  2. Article
  3. Putative mechanisms of ocular inflammation in syphilis.Journal of ophthalmic inflammation and infection · 2026
    Review
  4. Formal description ofInternational journal of systematic and evolutionary microbiology · 2026
    Article
  5. Article
  6. The ancient E-ring in bacterial flagellar motors.FEMS microbiology reviews · 2026
    Review
  7. Frontiers in immunology · 2026
    Article
  8. Frontiers in immunology · 2026
    Article
  9. Review
  10. Article
  11. Article
  12. Update on syphilis diagnostics.Current opinion in infectious diseases · 2025
    Review
  13. Review
  14. Article
  15. Participants inFrontiers in immunology · 2025
    Review
  16. Article
  17. Article
  18. Article
  19. Development and utilization ofbioRxiv : the preprint server for biology · 2024
    Article
  20. Immunodominant extracellular loops ofbioRxiv : the preprint server for biology · 2024
    Article

33 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 1 country.

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
Jerrilyn K Howell
Sherille D Bradley
Yesha Zheng
Z Hong Zhou
Steven J Norris
The University of Texas Health Science Center at Houston · USUniversity of California, Los Angeles · US

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
NIAID NIH HHS 1R01AI087946NIAID NIH HHS R01 AI059048NIAID NIH HHS R01 AI087946
6 · The paper itself

Abstract

High-resolution cryo electron tomography (cryo-ET) was utilized to visualize Treponema pallidum, the causative agent of syphilis, at the molecular level. Three-dimensional (3D) reconstructions from 304 infectious organisms revealed unprecedented cellular structures of this unusual member of the spirochetal family. High-resolution cryo-ET reconstructions provided detailed structures of the cell envelope, which is significantly different from that of Gram-negative bacteria. The 4-nm lipid bilayer of both outer membrane and cytoplasmic membrane resolved in 3D reconstructions, providing an important marker for interpreting membrane-associated structures. Abundant lipoproteins cover the outer leaflet of the cytoplasmic membrane, in contrast to the rare outer membrane proteins visible by scanning probe microscopy. High-resolution cryo-ET images also provided the first observation of T. pallidum chemoreceptor arrays, as well as structural details of the periplasmically located cone-shaped structure at both ends of the bacterium. Furthermore, 3D subvolume averages of periplasmic flagellar motors and flagellar filaments from living organisms revealed the novel flagellar architectures that may facilitate their rotation within the confining periplasmic space. Our findings provide the most detailed structural understanding of periplasmic flagella and the surrounding cell envelope, which enable this enigmatic bacterium to efficiently penetrate tissue and to escape host immune responses.

Indexed as

Bacterial ProteinsCell MembraneCryoelectron MicroscopyCytoskeletonElectron Microscope TomographyFlagellaHumansImage Processing, Computer-AssistedImaging, Three-DimensionalMolecular Motor ProteinsPeptidoglycanPeriplasmTreponema pallidumBacterial ProteinsMolecular Motor ProteinsPeptidoglycan

Identifiers

PMID20850455
PMCPMC2957517
OpenAlexW2071700210

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.