Juno is the egg Izumo receptor and is essential for mammalian fertilization.
Juno is the egg Izumo receptor and is essential for mammalian fertilization.
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Fertilisation occurs when sperm and egg recognise 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 egg receptor has remained a mystery. Here, we identify Juno as the receptor for Izumo1 on mouse eggs, and show this interaction is conserved within mammals. Female mice lacking Juno are infertile and Juno-deficient eggs do not fuse with normal sperm. Rapid shedding of Juno from the oolemma after fertilisation 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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影响因子:
30.8
作者:
Kaji, K;Oda, S;Kudo, A
通讯作者:
Kudo, A
DOI:
10.3791/3881
发表时间:
2012-03-05
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Kerr JS;Wright GJ
通讯作者:
Wright GJ
影响因子:
7
作者:
Bushell, K. Mark;Sollner, Christian;Wright, Gavin J.
通讯作者:
Wright, Gavin J.
影响因子:
3.6
作者:
KIMURA, Y;YANAGIMACHI, R
通讯作者:
YANAGIMACHI, R
影响因子:
8.6
作者:
Liang, Spencer C.;Moskalenko, Marina;Jooss, Karin
通讯作者:
Jooss, Karin