Evidence map›Paper›PMID 15793006›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2005

Three distinct kinetic groupings of the synaptotagmin family: candidate sensors for rapid and delayed exocytosis.

Enfu Hui, Jihong Bai, Ping Wang, Mutsuyuki Sugimori, Rodolfo R Llinas, Edwin R Chapman

Erratum issuedAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2005. 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 114 papers.

0numbers the graph read from it
0cells of the map it votes in
114citing papers in PubMed
5.5field-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

114 citing papers in PubMed, 199 citations in OpenAlex.

  1. Alternative splicing of synaptotagmin 7 regulates oligomerization and short-term synaptic plasticity.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Article
  3. Increased CA3 burst activity inbioRxiv : the preprint server for biology · 2026
    Article
  4. Membrane Merger Dynamics in Exocytosis and Endocytosis.Advances in experimental medicine and biology · 2026
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Synaptotagmin-9 in mouse retina.Visual neuroscience · 2024
    Article
  13. Article
  14. Article
  15. Complexin has a dual synaptic function as checkpoint protein in vesicle priming and as a promoter of vesicle fusion.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  16. Article
  17. SYNAPTOTAGMIN-9 IN MOUSE RETINA.bioRxiv : the preprint server for biology · 2024
    Article
  18. Article
  19. Article
  20. Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Enfu HuiDepartment of Physiology, University of Wisconsin, Madison, WI 53706, USA.
Jihong Bai
Ping Wang
Mutsuyuki Sugimori
Rodolfo R Llinas
Edwin R Chapman
University of Wisconsin–Madison · USUniversity Medical Center · USNew York University · US

Funding

Synaptotagmin C2B Domain as a Ca2+ Sensing ModuleR01MH061876 · NIMH · UNIVERSITY OF WISCONSIN-MADISON · PI Edwin R Chapman · 2002 to 2026
$7.7M
SYNAPTOTAGMIN IN EXCITATION/SECRETION COUPLINGR01GM056827 · NIGMS · UNIVERSITY OF WISCONSIN-MADISON · PI CHAPMAN, EDWIN R · 1998 to 2006
$1.8M
NIGMS NIH HHS GM 56827NIGMS NIH HHS R01 GM056827NIMH NIH HHS MH61876NIMH NIH HHS R01 MH061876PHS HHS 13742
6 · The paper itself

Abstract

Synaptotagmins (syts) are a family of membrane proteins present on a variety of intracellular organelles. In vertebrates, 16 isoforms of syt have been identified. The most abundant isoform, syt I, appears to function as a Ca2+ sensor that triggers the rapid exocytosis of synaptic vesicles from neurons. The functions of the remaining syt isoforms are less well understood. The cytoplasmic domain of syt I binds membranes in response to Ca2+, and this interaction has been proposed to play a key role in secretion. Here, we tested the Ca(2+)-triggered membrane-binding activity of the cytoplasmic domains of syts I-XII; eight isoforms tightly bound to liposomes that contained phosphatidylserine as a function of the concentration of Ca2+. We then compared the disassembly kinetics of Ca2+.syt.membrane complexes upon rapid mixing with excess Ca2+ chelator and found that syts can be classified into three distinct kinetic groups. syts I, II, and III constitute the fast group; syts V, VI, IX, and X make up the medium group; and syt VII exhibits the slowest kinetics of disassembly. Thus, isoforms of syt, which have much slower disassembly kinetics than does syt I, might function as Ca2+ sensors for asynchronous release, which occurs after Ca2+ domains have collapsed. We also compared the temperature dependence of Ca2+.syt.membrane assembly and disassembly reactions by using squid and rat syt I. These results indicate that syts have diverged to release Ca2+ and membranes with distinct kinetics.

Indexed as

AnimalsCalciumCalcium-Binding ProteinsExocytosisIn Vitro TechniquesKineticsLiposomesMembrane GlycoproteinsModels, BiologicalModels, MolecularNerve Tissue ProteinsNeuronsProtein IsoformsProtein Structure, TertiaryRatsRecombinant ProteinsCalciumCalcium-Binding ProteinsLiposomesMembrane GlycoproteinsNerve Tissue ProteinsProtein IsoformsRecombinant ProteinsSynaptotagmins

Identifiers

PMID15793006
PMCPMC556003
OpenAlexW2168315683

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.