经过B染色体消除的胚胎表达了与线粒相关基因的B变体
Tereza Bojdová1,2, Lucie Hloušková1,2, Kateřina Holušová1
1Institute of Experimental Botany of the Czech Academy of Sciences, Centre of Plant Structural and Functional Genomics, Šlechtitelů 31, Olomouc, 779 00, Czech Republic.
Genome biology
|December 23, 2025
概括
在Sorghum purpureosericeum中选择性DNA清除涉及胚胎发育期间编程的B染色体去除. 这项研究确定了候选基因,并揭示了B染色体的起源和修改的线粒机械.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 选择性DNA消除对于物种的发展和进化至关重要.
- 消除DNA的机制,包括染色体的去除,尚未完全理解.
- 这项研究调查了在胚胎发生过程中Sorghum purpureosericeum B染色体的消除.
研究的目的:
- 描述 Sorghum purpureosericeum 中 B 染色体的基因组和转录组特征.
- 确定胚胎发育过程中B染色体消除的基础分子机制.
- 为了解基因组进化和超数的染色体元素提供基础.
主要方法:
- 在现场B染色体可视化
- 转录形状分析和基因丰富分析.
- 基因组测序是指基因组的测序.
- 关键蛋白质的结构建模.
主要成果:
- 确定了28个与B染色体消除相关的候选基因.
- 证明了B染色体消除作为一个被编程的过程,在胚胎生成中期达到顶峰.
- 描述了B染色体是多A染色体的起源,基因密度降低和新的重复.
- 揭示了在消除过程中表达的线粒机械基因的B特异型变体.
- 在kinetochore蛋白 (CENH3,CENP-C) 中表示功能分歧.
结论:
- 提供了第一个全面的基因组和转录基因组分析B染色体消除在Sorghum purpureosericeum.
- 建议B染色体利用修改的线粒机器来调节它们自己的排泄.
- 建立了候选基因的框架,以进一步研究染色体消除机制.
- 提供了对基因组调节和超数染色体耐受性的见解.
关键词:
在B染色体中,B染色体是B 染色体的起源B染色体特异性 (peri) 中心重复的重复在CENH3中,染色体的消除 染色体的消除凝聚力 一致性在Kinetochore中进行演出.微核是微核中的一个.Sorghum 的意思是 Sorghum 的意思更多相关视频
07:32Protocols for Obtaining Zygotic and Somatic Embryos for Studying the Regulation of Early Embryo Development in the Model Legume Medicago truncatula
Published on: June 9, 2015
14.4K
10:39Functional Manipulation of Maternal Gene Products Using In Vitro Oocyte Maturation in Zebrafish
Published on: April 22, 2017
11.8K
相关概念视频
Meiosis vs. Mitosis
69.1K
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
69.1K
Meiosis I
43.7K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
43.7K
In-vitro Mutagenesis
16.0K
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
16.0K
Gene Conversion
10.5K
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
10.5K
Meiosis II
48.9K
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
48.9K
Meiosis II
206.4K
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
206.4K
