Evidence map›Paper›PMID 21844343›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Two synaptobrevin molecules are sufficient for vesicle fusion in central nervous system synapses.

Raunak Sinha, Saheeb Ahmed, Reinhard Jahn, Jurgen Klingauf

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 114 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
114citing papers in PubMed, 1 pooled it
5.5field-weighted citation impact, top 4% 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

114 citing papers in PubMed, 1 synthesis or guideline pooled it, 187 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Munc13 serves as a molecular filter for SNARE sorting and assembly in active zone condensates.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  5. Article
  6. Membrane Merger Dynamics in Exocytosis and Endocytosis.Advances in experimental medicine and biology · 2026
    Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Properties of Hippocampal Mossy Fibre Synapses in VAMP7 KO Mice.The European journal of neuroscience · 2025
    Article
  12. Molecular architecture of synaptic vesicles.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  13. Syntaxin 3B: A SNARE Protein Required for Vision.International journal of molecular sciences · 2024
    Review
  14. Review
  15. Article
  16. Article
  17. Article
  18. Mechanisms of SNARE proteins in membrane fusion.Nature reviews. Molecular cell biology · 2024
    Review
  19. All SNAP25 molecules in the vesicle-plasma membrane contact zone change conformation during vesicle priming.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  20. Article

54 more citing papers are in PubMed but not listed here.

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

4 authors at 2 institutions in 1 country.

Raunak SinhaDepartment of Membrane Biophysics, Max-Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.
Saheeb Ahmed
Reinhard Jahn
Jurgen Klingauf
Max Planck Institute for Biophysical Chemistry · DEMax Planck Society · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Exocytosis of synaptic vesicles (SVs) during fast synaptic transmission is mediated by soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) complex assembly formed by the coil-coiling of three members of this protein family: vesicle SNARE protein, synaptobrevin 2 (syb2), and the presynaptic membrane SNAREs syntaxin-1A and SNAP-25. However, it is controversially debated how many SNARE complexes are minimally needed for SV priming and fusion. To quantify this effective number, we measured the fluorescence responses from single fusing vesicles expressing pHluorin (pHl), a pH-sensitive variant of GFP, fused to the luminal domain of the vesicular SNARE syb2 (spH) in cultured hippocampal neurons lacking endogenous syb2. Fluorescence responses were quantal, with the unitary signals precisely corresponding to single pHluorin molecules. Using this approach we found that two copies of spH per SV fully rescued evoked fusion whereas SVs expressing only one spH were unable to rapidly fuse upon stimulation. Thus, two syb2 molecules and likely two SNARE complexes are necessary and sufficient for SV fusion during fast synaptic transmission.

Indexed as

Membrane FusionAnimalsCalciumCentral Nervous SystemExocytosisFluorescenceGene DosageGreen Fluorescent ProteinsHippocampusMiceMice, Inbred C57BLMice, KnockoutNeuronsRecombinant Fusion ProteinsSynaptic TransmissionSynaptic VesiclesCalciumGreen Fluorescent ProteinsPHluorinRecombinant Fusion ProteinsVesicle-Associated Membrane Protein 2vesicle-associated membrane protein 2, mouseVesicle-Associated Membrane Protein 3vesicle-associated membrane protein 3, mouse

Identifiers

PMID21844343
PMCPMC3161593
OpenAlexW1994766366

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.