GATA4与Sox9增强剂mXYSRa/Enh13的结合对于小鼠的丸分化至关重要
Yuya Ogawa1,2,3, Iku Tsuchiya1,2, Shogo Yanai4
1Department of Systems BioMedicine, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo, Japan.
Communications biology
|January 18, 2025
概括
在mXYSRa/Enh13增强剂中新发现的一种序列对于在小鼠中确定雄性性别至关重要. 对该序列的GATA4结合对于丸发育至关重要,并且需要SOX9表达.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 哺乳动物繁殖 哺乳动物繁殖
背景情况:
- 在哺乳动物中,SOX9的表达对雄性淋巴体的性别确定至关重要.
- 在小鼠胚胎发育过程中,mXYSRa/Enh13增强剂对Sox9调节至关重要.
- 之前的研究在mXYSRa/Enh13中确定了SOX9和SRY结合位点,它们的删除导致性别逆转.
研究的目的:
- 为了在mXYSRa/Enh13增强器中识别额外的功能序列.
- 阐明这些序列在男性性别决定中的作用.
- 为了研究参与增强器功能的分子相互作用.
主要方法:
- 在mXYSRa/Enh13增强器中产生部分缺失的小鼠.
- 使用CUT&RUN检测蛋白相互作用的体内结合试验.
- 在体外光酶报告员测定以评估增强剂活性.
主要成果:
- 在mXYSRa/Enh13中,部分删除,特别是两个核酸替代,导致男性对女性的性别逆转.
- CUT&RUN测试表明,GATA4与这个新发现的功能序列结合.
- 路西法酶试验证实,GATA4结合促进了增强剂活性,而序列替代减轻了这种效应.
结论:
- 在mXYSRa/Enh13增强体内,一个额外的功能序列对于丸分化至关重要.
- 对该序列的GATA4结合是适当的增强器功能和男性性别确定所需的.
- 这一发现突出了管理哺乳动物性别决定的复杂调节机制.
相关概念视频
Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
Pleiotropy
39.6K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
39.6K
The Y Chromosome Determines Maleness
6.5K
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....
6.5K
Development of the Sexual Organs in the Embryo and Fetus
523
Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
523
The Ratio of X Chromosome to Autosomes
8.4K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.4K


