Evidence map›Paper›PMID 21342473›Full record

ArticleMicrobial biotechnology2011

Extracellular Streptomyces vesicles: amphorae for survival and defence.

Hildgund Schrempf, Ilona Koebsch, Stefan Walter, Harald Engelhardt, Holger Meschke

Open access · bronzeAbstract read
In one paragraph

Article in Microbial biotechnology, 2011. 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
1.2field-weighted citation impact, top 23% 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

37 citing papers in PubMed, 75 citations in OpenAlex.

  1. Review
  2. Review
  3. Article
  4. Extracellular vesicles in bone aging: therapeutic strategies and applications.Extracellular vesicles and circulating nucleic acids · 2025
    Review
  5. Journal of bacteriology · 2024
    Article
  6. Review
  7. Review
  8. Tolerance, Adaptation, and Cell Response Elicited byInternational journal of molecular sciences · 2022
    Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Streptomyces coelicolor Vesicles: Many Molecules To Be Delivered.Applied and environmental microbiology · 2022
    Article
  14. Article
  15. Comparative Proteomic Analysis of Membrane Vesicles from ClinicalClinical, cosmetic and investigational dermatology · 2022
    Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. 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

5 authors at 2 institutions in 1 country.

Hildgund SchrempfFB Biology/Chemistry, Applied Genetics of Microorganisms, University Osnabrück, Barbarastr. 13, D-49069 Osnabrück, Germany. schrempf@biologie.uni-osnabrueck.de
Ilona Koebsch
Stefan Walter
Harald Engelhardt
Holger Meschke
Osnabrück University · DEMax Planck Society · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Blue-pigmented exudates arise as droplets on sporulated lawns of Streptomyces coelicolor M110 grown on agar plates. Our electron microscopical and biochemical studies suggest that droplets contain densely packed vesicles with large assemblies of different protein types and/or the polyketide antibiotic actinorhodin. Frozen-hydrated vesicles were unilamellar with a typical bilayer membrane, and ranged from 80 to 400 nm in diameter with a preferred width of 150-300 nm. By means of cryo-electron tomography, three types were reconstructed three-dimensionally: vesicles that were filled with particulate material, likely protein assemblies, those that contained membrane-bound particles, and a vesicle that showed a higher contrast inside, but lacked particles. Our LC/MS analyses of generated tryptic peptides led to the identification of distinct proteins that carry often a predicted N-terminal signal peptide with a twin-arginine motif or lack a canonical signal sequence. The proteins are required for a range of processes: the acquisition of inorganic as well as organic phosphate, iron ions, and of distinct carbon sources, energy metabolism and redox balance, defence against oxidants and tellurites, the tailoring of actinorhodin, folding and assembly of proteins, establishment of turgor, and different signalling cascades. Our novel findings have immense implications for understanding new avenues of environmental biology of streptomycetes and for biotechnological applications.

Indexed as

AnthraquinonesBacterial ProteinsBenzoisochromanequinonesCytoplasmic VesiclesExtracellular SpaceMicrobial ViabilityStreptomyces coelicoloractinorhodinAnthraquinonesBacterial ProteinsBenzoisochromanequinones

Identifiers

PMID21342473
PMCPMC3818868
OpenAlexW1525293196

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.