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Juno is the egg Izumo receptor and is essential for mammalian fertilization

Open access
Bianchi, Enrica, Doe, Brendan, Goulding, David, Wright, Gavin J.·2014·Nature

Abstract

Fertilization occurs when sperm and egg recognize each other and fuse to form a new, genetically distinct organism. The molecular basis of sperm–egg recognition is unknown, but is likely to require interactions between receptor proteins displayed on their surface. Izumo1 is an essential sperm cell-surface protein, but its receptor on the egg has not been described. Here we identify folate receptor 4 (Folr4) as the receptor for Izumo1 on the mouse egg, and propose to rename it Juno. We show that the Izumo1–Juno interaction is conserved within several mammalian species, including humans. Female mice lacking Juno are infertile and Juno-deficient eggs do not fuse with normal sperm. Rapid shedding of Juno from the oolemma after fertilization suggests a mechanism for the membrane block to polyspermy, ensuring eggs normally fuse with just a single sperm. Our discovery of an essential receptor pair at the nexus of conception provides opportunities for the rational development of new fertility treatments and contraceptives.

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Metadata

Authors
Bianchi, E., Doe, B., Goulding, D., & Wright, G. J.
Venue
Nature
Published
2014-04
Volume
508
Issue
7497
Pages
483-487
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1983611278
Cited by
671
References
3
FWCI
55.76
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Juno is the egg Izumo receptor and is essential for mammalian fertilization. https://app.cochat.ai/papers/10.1038/nature13203
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Bianchi, E., Doe, B., Goulding, D., & Wright, G. J. (2014). Juno is the egg Izumo receptor and is essential for mammalian fertilization. Nature. https://doi.org/10.1038/nature13203

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