Evidence map›Paper›PMID 19395568›Full record

ArticleApplied and environmental microbiology2009

Widespread abundance of functional bacterial amyloid in mycolata and other gram-positive bacteria.

Peter Bruun Jordal, Morten Simonsen Dueholm, Poul Larsen, Steen Vang Petersen, Jan Johannes Enghild, Gunna Christiansen, Peter Højrup, Per Halkjaer Nielsen, Daniel Erik Otzen

Open access · greenAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
7.1field-weighted citation impact, top 3% 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

45 citing papers in PubMed, 73 citations in OpenAlex.

  1. The Evolution of Functional Amyloids and Their Impact on Host-Microbe Interactions.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Review
  8. Review
  9. Functional Amyloids.Cold Spring Harbor perspectives in biology · 2019
    Review
  10. Review
  11. Article
  12. Microbiota-gut-brain axis and toll-like receptors in Alzheimer's disease.Computational and structural biotechnology journal · 2019
    Review
  13. Review
  14. Review
  15. Article
  16. Article
  17. Article
  18. The Sheaths ofFrontiers in microbiology · 2018
    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

9 authors at 3 institutions in 1 country.

Peter Bruun JordaliNANO, Department of Molecular Biology, University of Aarhus, Denmark.
Morten Simonsen Dueholm
Poul Larsen
Steen Vang Petersen
Jan Johannes Enghild
Gunna Christiansen
Peter Højrup
Per Halkjaer Nielsen
Daniel Erik Otzen
Aarhus University · DKAalborg University · DKUniversity of Southern Denmark · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Until recently, extracellular functional bacterial amyloid (FuBA) has been detected and characterized in only a few bacterial species, including Escherichia coli, Salmonella, and the gram-positive organism Streptomyces coelicolor. Here we probed gram-positive bacteria with conformationally specific antibodies and revealed the existence of FuBA in 12 of 14 examined mycolata species, as well as six other distantly related species examined belonging to the phyla Actinobacteria and Firmicutes. Most of the bacteria produced extracellular fimbriae, sometimes copious amounts of them, and in two cases large extracellular fibrils were also produced. In three cases, FuBA was revealed only after extensive removal of extracellular material by saponification, indicating that there is integrated attachment within the cellular envelope. Spores of species in the genera Streptomyces, Bacillus, and Nocardia were all coated with amyloids. FuBA was purified from Gordonia amarae (from the cell envelope) and Geodermatophilus obscurus, and they had the morphology, tinctorial properties, and beta-rich structure typical of amyloid. The presence of approximately 9-nm-wide amyloids in the cell envelope of G. amarae was visualized by transmission electron microscopy analysis. We conclude that amyloid is widespread among gram-positive bacteria and may in many species constitute a hitherto overlooked integral part of the spore and the cellular envelope.

Indexed as

AmyloidBacterial ProteinsCell WallGram-Positive BacteriaMicroscopy, Electron, TransmissionProtein Structure, SecondaryAmyloidBacterial Proteins

Identifiers

PMID19395568
PMCPMC2698375
OpenAlexW2102868862

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.