Binding of mouse sperm to beta-galactose residues on egg zona pellucida and asialofetuin-coupled beads.

Binding of mouse sperm to beta-galactose residues on egg zona pellucida and asialofetuin-coupled beads.
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小鼠精子与卵透明带上的 β-半乳糖残基和脱唾液酸胎球蛋白偶联珠的结合。

DOI:
10.1006/bbrc.1997.7249
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发表时间:
1997
影响因子:
3.1
通讯作者:
S. Takasaki
S. Takasaki
中科院分区:
生物学4区
文献类型:
--
作者:
E. Mori;T. Mori;S. Takasaki

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用多聚甲醛固定的小鼠卵与各种外切糖苷酶孵育,并检测其精子结合活性。唾液酸酶处理可增加每个卵子结合的精子数,而β-半乳糖苷酶处理可减少每个卵子结合的精子数。α-半乳糖苷酶处理后,未观察到精子结合率显著降低。小鼠精子也与去唾液酸胎球蛋白偶联的琼脂糖珠结合,但不与胎球蛋白偶联的珠结合。当去唾液酸胎球蛋白-凝胶用对β 1->4键特异的β-半乳糖苷酶或N-聚糖酶处理时,精子结合被消除。此外,无唾液酸胎球蛋白,但不是β-半乳糖苷酶处理的无唾液酸胎球蛋白,竞争性抑制精子的结合,以透明的活卵。这些结果表明,小鼠精子在结合的初始阶段识别透明质酸的β-半乳糖残基。
Mouse eggs fixed with paraformaldehyde were incubated with various exoglycosidases and their sperm-binding activities were examined. The number of sperm bound per egg was increased by sialidase treatment and decreased by beta-galactosidase treatment. No prominent reduction of sperm-binding was observed after alpha-galactosidase treatment. Mouse sperm also bound to asialofetuin-coupled agarose beads but not to fetuin-coupled beads. The sperm-binding was abolished when asialofetuin-gel was treated with beta-galactosidase specific to the beta 1-->4 linkage or N-Glycanase. Furthermore asialofetuin, but not beta-galactosidase-treated asialofetuin, competitively inhibited the binding of sperm to the zona pellucida of live eggs. These results suggest that mouse sperm recognize beta-galactose residues of the zona pellucida at the initial stage of the binding.
DOI: --
发表时间: 1989-01
期刊: The Journal of biological chemistry
影响因子: --
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发表时间: 1995
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期刊: BIOCHEMISTRY
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