Evidence map›Paper›PMID 34031903›Full record

ArticleThe EMBO journal2021

Endospore Appendages: a novel pilus superfamily from the endospores of pathogenic Bacilli.

Brajabandhu Pradhan, Janine Liedtke, Mike Sleutel, Toril Lindbäck, Ephrem Debebe Zegeye, Kristin O Sullivan, Ann-Katrin Llarena, Ola Brynildsrud, Marina Aspholm, Han Remaut

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
3.7field-weighted citation impact, top 7% 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

15 citing papers in PubMed, 34 citations in OpenAlex.

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  5. Endospore appendages enhance adhesion ofApplied and environmental microbiology · 2025
    Article
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  8. Cryo-EM analysis of thebioRxiv : the preprint server for biology · 2025
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  10. Article
  11. Article
  12. Review
  13. Enigmatic Pilus-Like Endospore Appendages ofInternational journal of molecular sciences · 2021
    Review
  14. Article
  15. Review
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

10 authors at 3 institutions in 2 countries.

Brajabandhu PradhanStructural and Molecular Microbiology, VIB-VUB Center for Structural Biology, VIB, Brussels, Belgium.ORCID 0000-0001-5732-6675
Janine LiedtkeDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.ORCID 0000-0003-2680-4130
Mike SleutelStructural and Molecular Microbiology, VIB-VUB Center for Structural Biology, VIB, Brussels, Belgium.ORCID 0000-0003-3247-2187
Toril LindbäckDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.
Ephrem Debebe ZegeyeDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.
Kristin O SullivanDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.
Ann-Katrin LlarenaDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.ORCID 0000-0001-5278-7253
Ola BrynildsrudDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.
Marina AspholmDepartment of Paraclinical Sciences, Faculty of Veterinary Medicine, The Norwegian University of Life Sciences, Ås, Norway.ORCID 0000-0003-3175-6022
Han RemautStructural and Molecular Microbiology, VIB-VUB Center for Structural Biology, VIB, Brussels, Belgium.ORCID 0000-0002-9775-4102
Norwegian University of Life Sciences · NOVrije Universiteit Brussel · BENorwegian Institute of Public Health · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bacillus cereus sensu lato is a group of Gram-positive endospore-forming bacteria with high ecological diversity. Their endospores are decorated with micrometer-long appendages of unknown identity and function. Here, we isolate endospore appendages (Enas) from the food poisoning outbreak strain B. cereus NVH 0075-95 and find proteinaceous fibers of two main morphologies: S- and L-Ena. By using cryoEM and 3D helical reconstruction of S-Enas, we show these to represent a novel class of Gram-positive pili. S-Enas consist of single domain subunits with jellyroll topology that are laterally stacked by β-sheet augmentation. S-Enas are longitudinally stabilized by disulfide bonding through N-terminal connector peptides that bridge the helical turns. Together, this results in flexible pili that are highly resistant to heat, drought, and chemical damage. Phylogenomic analysis reveals a ubiquitous presence of the ena-gene cluster in the B. cereus group, which include species of clinical, environmental, and food importance. We propose Enas to represent a new class of pili specifically adapted to the harsh conditions encountered by bacterial spores.

Indexed as

Bacillus cereusBacterial ProteinsCryoelectron MicroscopyFimbriae, BacterialProtein Conformation, alpha-HelicalProtein Conformation, beta-StrandProtein StabilityBacterial ProteinsBacillusEndosporepilusprotein nanofiberself-assembly

Identifiers

PMID34031903
PMCPMC8408608
OpenAlexW3164404900

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.