Evidence map›Paper›PMID 29382829›Full record

ArticleNature communications2018

Type IX secretion system PorM and gliding machinery GldM form arches spanning the periplasmic space.

Philippe Leone, Jennifer Roche, Maxence S Vincent, Quang Hieu Tran, Aline Desmyter, Eric Cascales, Christine Kellenberger, Christian Cambillau, Alain Roussel

Abstract read
In one paragraph

Article in Nature communications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing 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

37 citing papers in PubMed.

  1. Article
  2. The C-terminal domain of T9SS component protein SprA assistsApplied and environmental microbiology · 2025
    Article
  3. Article
  4. Article
  5. Advances in the type IX secretion system: an exploration focusing onCurrent research in microbial sciences · 2025
    Review
  6. TheJournal of oral microbiology · 2025
    Article
  7. Article
  8. Structure-function analysis of PorXScientific reports · 2024
    Article
  9. Structural Modeling of T9SS Outer Membrane Proteins and Their Complexes.Methods in molecular biology (Clifton, N.J.) · 2024
    Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. A unique bacterial secretion machinery with multiple secretion centers.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  18. Article
  19. Bacterial motility: machinery and mechanisms.Nature reviews. Microbiology · 2022
    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

9 authors.

Philippe LeoneArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France.
Jennifer RocheArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France.
Maxence S VincentLaboratoire d'Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique (UMR7255), Aix-Marseille Université, 31 Chemin Joseph Aiguier, 13402, Marseille Cedex 20, France.
Quang Hieu TranArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France.
Aline DesmyterArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France.
Eric CascalesLaboratoire d'Ingénierie des Systèmes Macromoléculaires, Institut de Microbiologie de la Méditerranée, Centre National de la Recherche Scientifique (UMR7255), Aix-Marseille Université, 31 Chemin Joseph Aiguier, 13402, Marseille Cedex 20, France.ORCID http://orcid.org/0000-0003-0611-9179
Christine KellenbergerArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France.
Christian CambillauArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France. cambillau@afmb.univ-mrs.fr.ORCID http://orcid.org/0000-0001-5502-4729
Alain RousselArchitecture et Fonction des Macromolécules Biologiques, Aix-Marseille Université, UMR 7257, 163 Avenue de Luminy, Case 932, 13009, Marseille, France. alain.roussel@afmb.univ-mrs.fr.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Type IX secretion system (T9SS), exclusively present in the Bacteroidetes phylum, has been studied mainly in Flavobacterium johnsoniae and Porphyromonas gingivalis. Among the 18 genes, essential for T9SS function, a group of four, porK-N (P. gingivalis) or gldK-N (F. johnsoniae) belongs to a co-transcribed operon that expresses the T9SS core membrane complex. The central component of this complex, PorM (or GldM), is anchored in the inner membrane by a trans-membrane helix and interacts through the outer membrane PorK-N complex. There is a complete lack of available atomic structures for any component of T9SS, including the PorKLMN complex. Here we report the crystal structure of the GldM and PorM periplasmic domains. Dimeric GldM and PorM, each contain four domains of ~180-Å length that span most of the periplasmic space. These and previously reported results allow us to propose a model of the T9SS core membrane complex as well as its functional behavior.

Indexed as

AnimalsBacterial ProteinsBacterial Secretion SystemsCamelids, New WorldEscherichia coliFlavobacteriumPeriplasmPorphyromonas gingivalisProtein ConformationBacterial ProteinsBacterial Secretion Systems

Identifiers

PMID29382829
PMCPMC5790014

What OpenQuestion holds

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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.