Evidence map›Paper›PMID 27309808›Full record

ArticleNature2016

Structure of IZUMO1-JUNO reveals sperm-oocyte recognition during mammalian fertilization.

Umeharu Ohto, Hanako Ishida, Elena Krayukhina, Susumu Uchiyama, Naokazu Inoue, Toshiyuki Shimizu

Abstract read
PubMed Publisher
In one paragraph

Article in Nature, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed, 1 pooled it
7.3field-weighted citation impact, top 2% 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

84 citing papers in PubMed, 1 synthesis or guideline pooled it, 157 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. The SPARK complex forms the molecular basis of vertebrate fertilization.bioRxiv : the preprint server for biology · 2026
    Article
  8. Article
  9. Membrane Fusions During Mammalian Fertilization.Advances in experimental medicine and biology · 2026
    Review
  10. TheBiomolecules · 2025
    Review
  11. Article
  12. Article
  13. Molecular mechanisms leading to gamete fusion.Fukushima journal of medical science · 2025
    Review
  14. Article
  15. Article
  16. 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
  17. Review
  18. Article
  19. Article
  20. Article

24 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 4 institutions in 1 country.

Umeharu OhtoGraduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Hanako IshidaGraduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Elena KrayukhinaGraduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan.
Susumu UchiyamaGraduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan.
Naokazu InoueDepartment of Cell Science, Institute of Biomedical Sciences, School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima City, Fukushima 960-1295, Japan.
Toshiyuki ShimizuGraduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
The University of Tokyo · JPFukushima Medical University · JPOkazaki Institute for Integrative Bioscience · JPOsaka University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fertilization is a fundamental process in sexual reproduction, creating a new individual through the combination of male and female gametes. The IZUMO1 sperm membrane protein and its counterpart oocyte receptor JUNO have been identified as essential factors for sperm-oocyte interaction and fusion. However, the mechanism underlying their specific recognition remains poorly defined. Here, we show the crystal structures of human IZUMO1, JUNO and the IZUMO1-JUNO complex, establishing the structural basis for the IZUMO1-JUNO-mediated sperm-oocyte interaction. IZUMO1 exhibits an elongated rod-shaped structure comprised of a helical bundle IZUMO domain and an immunoglobulin-like domain that are each firmly anchored to an intervening β-hairpin region through conserved disulfide bonds. The central β-hairpin region of IZUMO1 provides the main platform for JUNO binding, while the surface located behind the putative JUNO ligand binding pocket is involved in IZUMO1 binding. Structure-based mutagenesis analysis confirms the biological importance of the IZUMO1-JUNO interaction. This structure provides a major step towards elucidating an essential phase of fertilization and it will contribute to the development of new therapeutic interventions for fertility, such as contraceptive agents.

Indexed as

Sperm-Ovum InteractionsBinding SitesCarrier ProteinsCrystallography, X-RayEgg ProteinsFemaleHumansImmunoglobulinsLigandsMaleMembrane ProteinsModels, MolecularMutationOocytesProtein BindingProtein Structure, TertiaryCarrier ProteinsEgg ProteinsImmunoglobulinsIZUMO1 protein, humanIZUMO1R protein, humanLigandsMembrane ProteinsReceptors, Cell Surface

Identifiers

PMID27309808
OpenAlexW2426434807

What OpenQuestion holds

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Read underepoch 390

Registered trials

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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.