多样化和反复适应Drosophila中突触膜复合体的多样化和反复适应
Rana Zakerzade1,2, Ching-Ho Chang3, Kamalakar Chatla4
1Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada.
PLoS genetics
|January 13, 2025
概括
松虫的突触膜复合体 (SC) 迅速进化,基因通过重复和积极选择而多样化,从而导致雄性生殖系中的新功能和表达模式.
科学领域:
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 突触膜复合体 (SC) 是一种保护的蛋白质结构,对半分裂至关重要,促进同源染色体配对和重组.
- 尽管SC组件的作用得到了保护,但SC组件,特别是在Drosophila中,表现出快速的序列进化,并且缺乏属外可识别的同类物.
研究的目的:
- 通过高密度比较的基因组学方法,研究Drosophila中SC基因的进化史.
- 了解推动快速进化的机制,包括放松约束,积极选择,基因重复和监管变化.
主要方法:
- 在Drosophila中具有高物种密度的比较类基因组学.
- 对编码进化速率,基因重复事件 (并联和逆重复) 和正选择的分析.
- 检查生殖系基因表达模式和调控进化.
主要成果:
- 与其他介质基因相比,Drosophila中的SC基因表现出显著提高的编码进化率,这是由放松的约束和积极选择驱动的.
- 关键的SC组件,如cona和c(3) G,通过重复实现多样化,产生与新的生殖系活动的相似性.
- 截断的蛋白质末端和高丸表达的融合进化在不同的血统中c(3)G对应物中;反复的调节进化导致高生殖系表达,即使在雄性瘤男性中也是如此.
结论:
- SC组件的保存不良延伸到Drosophila的副本数,基因组位置和生殖系调节.
- 男子SC基因的生殖基因活动似乎处于强大的进化压力之下,推动了反复的适应和创新.
- 复制,积极选择和监管变化是SC基因进化和Drosophila的功能多样化的关键驱动因素.
更多相关视频
11:36Analyzing Synaptic Modulation of Drosophila melanogaster Photoreceptors after Exposure to Prolonged Light
Published on: February 10, 2017
6.5K
13:59Studying Mitotic Checkpoint by Illustrating Dynamic Kinetochore Protein Behavior and Chromosome Motion in Living Drosophila Syncytial Embryos
Published on: June 14, 2012
11.4K
相关概念视频
02:04Polytene Chromosomes
9.9K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
9.9K
02:32Exon Recombination
3.5K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.5K
02:32Position-effect Variegation
6.3K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
6.3K
01:57Protein Complexes with Interchangeable Parts
2.5K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.5K