精ADAM32L2在体反应中的表达,定位和处理:精子-卵子相互作用中的可能功能
Mohamad Shuib Bin Mohamad Mohtar1, Rangga Setiawan1,2, Maiko Kuwabara1
1Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
The journal of poultry science
|September 2, 2025
概括
的精子利用ADAM32L2,一个独特的蛋白质,与卵进行相互作用. 这种蛋白在体反应过程中经历处理,帮助精子与内周维他林层结合.
科学领域:
- 生殖生物学
- 分子生物学
- 蛋白质组学
背景情况:
- 精子与卵子的相互作用对于受精至关重要,涉及到特定物种的分子事件,如体反应 (AR).
- 解体蛋白和金属蛋白酶 (ADAM) 是这些相互作用的关键参与者,在物种中发挥着不同的作用.
- 之前在的精子中发现了一种新的鸟类ADAM蛋白ADAM32L2.
研究的目的:
- 研究ADAM32L2在精卵相互作用中的功能作用.
- 阐明ADAM32L2在体反应中的处理和定位.
- 确定ADAM32L2参与精子与内周维素层 (IPVL) 的结合.
主要方法:
- 精膜的蛋白质组分析
- 使用特定的ADAM32L2抗体进行免疫组织化学和西部抹杀.
- 体反应诱导和ADAM32L2处理的分析
- 使用ADAM32L2抗体进行抑制测定以评估IPVL透率.
主要成果:
- ADAM32L2 主要表达在丸中,并局限于精子体区域.
- 在AR过程中,80kDa的ADAM32L2被加工成45kDa的C端碎片.
- 一个纯化的ADAM32L2抗体抑制了IPVL的精子透,这表明加工的片段在结合中的作用.
- 证实蛋白酶活性对精子与IPVL相互作用至关重要.
结论:
- 通过其加工的C端片段,ADAM32L2在精子与IPVL结合中起着重要作用.
- 这项研究揭示了ADAM蛋白在鸟类精卵相互作用中的功能.
- 这些发现有助于了解鸟类受精的分子机制.
相关概念视频
01:38Fertilization
72.2K
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...
72.2K
01:41Spermatogenesis
103.3K
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
103.3K
01:22Sperm Structure and Semen Composition
4.9K
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
4.9K
01:15Sperm Transport
1.4K
The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
The maturation phase occurs in the epididymis, where sperm...
1.4K
02:19The Y Chromosome Determines Maleness
6.8K
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
6.8K