Evidence map›Paper›PMID 32284565›Full record

ArticleNature microbiology2020

Symmetry mismatch in the MS-ring of the bacterial flagellar rotor explains the structural coordination of secretion and rotation.

Steven Johnson, Yu Hang Fong, Justin C Deme, Emily J Furlong, Lucas Kuhlen, Susan M Lea

Abstract read
In one paragraph

Article in Nature microbiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers.

0numbers the graph read from it
0cells of the map it votes in
55citing 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

55 citing papers in PubMed.

  1. Article
  2. Article
  3. The last bacterial common ancestor encoded a complex flagellum.bioRxiv : the preprint server for biology · 2026
    Article
  4. Article
  5. Article
  6. The ancient E-ring in bacterial flagellar motors.FEMS microbiology reviews · 2026
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. FlgY, PflA, and PflB form a spoke-ring network in the high-torque flagellar motor ofProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  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

6 authors.

Steven Johnson *Sir William Dunn School of Pathology, University of Oxford, Oxford, UK.ORCID http://orcid.org/0000-0002-7877-3543
Yu Hang Fong *Sir William Dunn School of Pathology, University of Oxford, Oxford, UK.
Justin C DemeSir William Dunn School of Pathology, University of Oxford, Oxford, UK.ORCID http://orcid.org/0000-0001-8811-9871
Emily J FurlongSir William Dunn School of Pathology, University of Oxford, Oxford, UK.ORCID http://orcid.org/0000-0002-9086-2979
Lucas KuhlenSir William Dunn School of Pathology, University of Oxford, Oxford, UK.
Susan M LeaSir William Dunn School of Pathology, University of Oxford, Oxford, UK. susan.lea@path.ox.ac.uk.ORCID http://orcid.org/0000-0001-9287-8053

Funding

Medical Research Council MR/M011984/1Medical Research Council MR/S021264/1Wellcome Trust 100298Wellcome Trust 109136Wellcome Trust 201536Wellcome Trust 209194Wellcome Trust 209194/Z/17/Z
6 · The paper itself

Abstract

The bacterial flagellum is a complex self-assembling nanomachine that confers motility to the cell. Despite great variation across species, all flagella are ultimately constructed from a helical propeller that is attached to a motor embedded in the inner membrane. The motor consists of a series of stator units surrounding a central rotor made up of two ring complexes, the MS-ring and the C-ring. Despite many studies, high-resolution structural information is still lacking for the MS-ring of the rotor, and proposed mismatches in stoichiometry between the two rings have long provided a source of confusion for the field. Here, we present structures of the Salmonella MS-ring, revealing a high level of variation in inter- and intrachain symmetry that provides a structural explanation for the ability of the MS-ring to function as a complex and elegant interface between the two main functions of the flagellum-protein secretion and rotation.

Indexed as

BacteriaBacterial ProteinsBacterial Secretion SystemsFlagellaMembrane ProteinsModels, MolecularMolecular Motor ProteinsProtein ConformationProtein Interaction Domains and MotifsProtein MultimerizationSpores, BacterialStructure-Activity RelationshipBacterial ProteinsBacterial Secretion SystemsFlif protein, BacteriaMembrane ProteinsMolecular Motor Proteins

Identifiers

PMID32284565
PMCPMC7320910

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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.