Evidence map›Paper›PMID 23922942›Full record

ArticlePloS one2013

Type IV pilus proteins form an integrated structure extending from the cytoplasm to the outer membrane.

Chengyun Li, Regina A Wallace, Wesley P Black, Yue-zhong Li, Zhaomin Yang

Erratum issuedAbstract read
In one paragraph

Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Reconstitution of a minimal machinery capable of assembling periplasmic type IV pili.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  7. A Genotypic Analysis of FiveFrontiers in microbiology · 2017
    Article
  8. Article
  9. Architecture of the type IVa pilus machine.Science (New York, N.Y.) · 2016
    Article
  10. Appendages of the cyanobacterial cell.Life (Basel, Switzerland) · 2015
    Review
  11. Article
  12. Composition of the DNA-uptake complex ofMobile genetic elements · 2014
    Article
4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

5 authors.

Chengyun LiState Key Laboratory of Microbial Technology, School of Life Science, Shandong University, Jinan, China.
Regina A Wallace
Wesley P Black
Yue-zhong Li
Zhaomin Yang

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The bacterial type IV pilus (T4P) is the strongest biological motor known to date as its retraction can generate forces well over 100 pN. Myxococcus xanthus, a δ-proteobacterium, provides a good model for T4P investigations because its social (S) gliding motility is powered by T4P. In this study, the interactions among M. xanthus T4P proteins were investigated using genetics and the yeast two-hybrid (Y2H) system. Our genetic analysis suggests that there is an integrated T4P structure that crosses the inner membrane (IM), periplasm and the outer membrane (OM). Moreover, this structure exists in the absence of the pilus filament. A systematic Y2H survey provided evidence for direct interactions among IM and OM proteins exposed to the periplasm. For example, the IM lipoprotein PilP interacted with its cognate OM protein PilQ. In addition, interactions among T4P proteins from the thermophile Thermus thermophilus were investigated by Y2H. The results indicated similar protein-protein interactions in the T4P system of this non-proteobacterium despite significant sequence divergence between T4P proteins in T. thermophilus and M. xanthus. The observations here support the model of an integrated T4P structure in the absence of a pilus in diverse bacterial species.

Indexed as

Amino Acid SequenceBacterial ProteinsCytoplasmFimbriae, BacterialGene DeletionMolecular Sequence DataMyxococcus xanthusProtein Interaction MapsThermus thermophilusBacterial Proteins

Identifiers

PMID23922942
PMCPMC3724824

What OpenQuestion holds

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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.