Molecular dissection of IZUMO1, a sperm protein essential for sperm-egg fusion.

  title={Molecular dissection of IZUMO1, a sperm protein essential for sperm-egg fusion.},
  author={Naokazu Inoue and Daizo Hamada and Hironari Kamikubo and Kunio Hirata and Mikio Kataoka and Masaki Yamamoto and Masahito Ikawa and Masaru Okabe and Yoshihisa Hagihara},
  volume={140 15},
Although the membrane fusion of spermatozoon and egg cells is the central event of fertilization, the underlying molecular mechanism remains virtually unknown. Gene disruption studies have showed that IZUMO1 on spermatozoon and CD9 on oocyte are essential transmembrane proteins in sperm-egg fusion. In this study, we dissected IZUMO1 protein to determine the domains that were required for the function of sperm-egg fusion. We found that a fragment of the N terminus (Asp5 to Leu113) interacts with… CONTINUE READING
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