Evidence map›Paper›PMID 26568141›Full record

ArticleNature communications2015

Oocyte-triggered dimerization of sperm IZUMO1 promotes sperm-egg fusion in mice.

Naokazu Inoue, Yoshihisa Hagihara, Danelle Wright, Takahisa Suzuki, Ikuo Wada

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed, 1 pooled it
12.6field-weighted citation impact, top 1% 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

64 citing papers in PubMed, 1 synthesis or guideline pooled it, 110 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. The SPARK complex forms the molecular basis of vertebrate fertilization.bioRxiv : the preprint server for biology · 2026
    Article
  4. Article
  5. Membrane Fusions During Mammalian Fertilization.Advances in experimental medicine and biology · 2026
    Review
  6. Article
  7. Article
  8. Molecular mechanisms leading to gamete fusion.Fukushima journal of medical science · 2025
    Review
  9. Allosteric inhibition of the IZUMO1-JUNO fertilization complex by the naturally occurring antisperm antibody OBF13.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  10. Article
  11. Immunolocalization and proteomic analyses of IZUMO1 in porcine spermatozoa.Frontiers in cell and developmental biology · 2025
    Article
  12. Spatial Organization of the Sperm Cell Glycoproteome.Molecular & cellular proteomics : MCP · 2025
    Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

4 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

5 authors at 2 institutions in 1 country.

Naokazu InoueDepartment of Cell Science, Institutes for Biomedical Sciences, School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima City, Fukushima 960-1295, Japan.
Yoshihisa HagiharaNational Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
Danelle WrightDepartment of Cell Science, Institutes for Biomedical Sciences, School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima City, Fukushima 960-1295, Japan.
Takahisa SuzukiDepartment of Cell Science, Institutes for Biomedical Sciences, School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima City, Fukushima 960-1295, Japan.
Ikuo WadaDepartment of Cell Science, Institutes for Biomedical Sciences, School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima City, Fukushima 960-1295, Japan.
Fukushima Medical University · JPMidorigaoka Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sperm-egg fusion is indispensable for completing mammalian fertilization. Although the underlying molecular mechanisms are poorly understood, requirement of two spermatozoon factors, IZUMO1 and SPACA6, and two oocyte factors, CD9 and the IZUMO1 counter-receptor JUNO, has been proven by gene disruption, and the binding of cells to an oocyte can be reconstituted by ectopic expression of IZUMO1. Here we demonstrate that robust IZUMO1-dependent adhesion of sperm with an oocyte accompanies the dimerization of IZUMO1. Despite the intrinsic dimeric property of its N-terminal region, IZUMO1 is monomeric in spermatozoa. Interestingly, JUNO associates with monomeric IZUMO1, which is then quickly removed as tight adhesion of the two cells is subsequently established. We therefore propose that global structural rearrangement of IZUMO1 occurs on JUNO recognition and that this rearrangement may then initiate force generation to overcome repulsion between the juxtaposing membranes, through an unidentified receptor on the egg.

Indexed as

Sperm-Ovum InteractionsAnimalsCell AdhesionCell MembraneDimerizationFemaleFertilizationFertilization in VitroFluorescence Recovery After PhotobleachingImmunoglobulinsMaleMembrane ProteinsMiceMicroscopy, Electron, ScanningOocytesOptical Imagingfolate receptor 4, mouseImmunoglobulinsIzumo1 protein, mouseMembrane ProteinsReceptors, Cell Surface

Identifiers

PMID26568141
PMCPMC4660202
OpenAlexW2196510095

What OpenQuestion holds

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LicenceCC BY
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.