CatSper更高阶组件的分子基础
Qikui Xu1,2,3,4, Shiyi Lin1,2,3,4, Qingqing Zhao1,2,3,4
1State Key Laboratory of Gene Expression, School of Life Sciences, Westlake University, Hangzhou, Zhejiang 310024, China.
概括
CatSper通道对于精子运动和生育能力至关重要. 这项研究揭示了CatSper复合物的分子结构,确定CATSPERη对于通道组装和男性生育能力至关重要.
科学领域:
- 精子生物学 精子生物学
- 离子通道结构
- 男人生殖健康 男人生殖健康
背景情况:
- CatSper通道有助于 Ca2+ 流入精子鞭状体,这对运动性和受精至关重要.
- 功能障碍的CatSper通道导致由于失败的过度激活导致男性不孕.
- CatSper复合体的高阶组装成纳米领域的理解很少.
研究的目的:
- 阐明了CatSper寡合化和更高阶组合背后的分子机制.
- 为了确定CatSper纳米域形成的结构基础.
- 为了调查CATSPERη在CatSper功能和男性生育能力中的作用.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定CatSper二分离体和三分离体超大复合物的结构.
- 介导CatSper寡合化的二元接口的生物化学表征.
- 在小鼠体内和体外功能研究以评估CATSPERη的作用.
主要成果:
- 介绍了CatSper原生二进制和三进制巨型复合体的冷电磁结构,这是齐克扎克阵列的基本单元.
- 描述了两个不同的二元接口,包括涉及CATSPERβ/γ的细胞外相互作用和涉及CATSPERη的跨膜接口.
- 证明CATSPERη对于CatSper组装在精子鞭毛和随后的过度激活至关重要,CATSPERη缺乏的小鼠表现出不孕症.
结论:
- 提供了对CatSper通道更高层次组合的分子洞察力,揭示了四线性齐格扎格阵列的结构基础.
- 确定了CATSPERη作为CatSper复合体形成和男性生育能力的关键组成部分.
- 这些发现为开发新型男性避孕药提供了潜在的目标.
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