相关实验视频

Updated: May 5, 2026

Upright Imaging of Drosophila Egg Chambers

Upright Imaging of Drosophila Egg Chambers

Published on: March 13, 2015

从全长ZP3的X射线结构中了解卵子外组装和卵精子相互作用的洞察力

Ling Han¹, Magnus Monné, Hiroki Okumura

¹Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Huddinge, Sweden.

|October 26, 2010

概括

透明区 (ZP) 的蛋白质ZP3是ZP3.

科学领域:

生殖生物学生殖生物学
结构生物学结构生物学
生物化学生物化学

背景情况:

透明区 (ZP) 蛋白质形成了围绕哺乳动物卵细胞的细胞外基质.
ZP3是ZP矩阵的关键组成部分,作为主要的精子受体起作用.
了解ZP3结构对于阐明受精机制和物种特异性雌同体识别至关重要.

研究的目的:

为了确定鸟类ZP3同类的高分辨率晶体结构.
为了研究的外部疏水补丁 (EHP) 在ZP3聚合中的作用.
探索调节ZP3相互作用,精子结合和物种特异性的结构特征.

主要方法:

在2.0 Å分辨率的X射线晶体学.
一个完整的ZP域模块的结构分析.
保存和可变区域的比较分析,包括O-糖化位.

主要成果:

晶体结构显示了ZP域的同位体排列,这对于分泌是必不可少的.
证明EHP可以防止ZP3过早地被纳入ZP矩阵.
获得了对ZP子单元相互作用特异性的结构见解,受二硫化物模式和保存的O-甘氨酸的影响.

结论:

ZP3结构为理解ZP矩阵组装和调节提供了分子基础.
保存的O-甘氨酸和超变的C-终端区域可能在物种限制的精子识别中合作.
替代形状表明,在精子结合时,分子内信号传递的机制,调节受精.

更多相关视频

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs

Published on: January 27, 2021

Xenopus laevis Egg Extract Preparation and Live Imaging Methods for Visualizing Dynamic Cytoplasmic Organization

Xenopus laevis Egg Extract Preparation and Live Imaging Methods for Visualizing Dynamic Cytoplasmic Organization

Published on: June 6, 2021

相关概念视频

Fertilization

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...