在异卵性和内源性甚至跳过表达模式中统一的爆发策略
Augusto Berrocal1, Nicholas C Lammers2, Hernan G Garcia1,2,3,4,5
1Department of Molecular & Cell Biology, University of California at Berkeley, Berkeley, United States.
eLife
|December 9, 2024
概括
基因增强剂通过破裂来控制转录. 这项研究发现,均跳过增强剂使用一致的爆破策略,无论是在它们的自然位置还是其他地方,这表明一个统一的分子机制.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 基因转录发生在爆发中,这是由于随机促进体在活跃和不活跃状态之间切换.
- 增强剂通过改变突发频率,持续时间或振幅来调节动物发育中的转录输出.
- 以前的研究表明,不同的增强剂利用类似的爆破控制策略来实现各种转录输出.
研究的目的:
- 调查增强剂是否适应其爆破策略以适应其监管环境.
- 区分统一的分子机制和自然选择作为保存增强剂爆破策略的驱动因素.
主要方法:
- 在果胚胎中产生了异胎甚至跳过的转录模式.
- 在内源基因表达模式和子宫外基因表达模式之间比较了转录突破特征.
- 在不同的监管环境中分析了爆发频率,持续时间和振幅的调制.
主要成果:
- 对于均跳过表达的转录性爆发策略在内源性和异胎性模式之间保持一致.
- 没有观察到突发频率,持续时间或振幅调制的显著差异.
- 研究结果表明,监管环境并不决定增强剂爆破控制策略.
结论:
- 证据支持一个统一的分子机制,统治甚至跳过的增强剂爆破策略.
- 保存的爆破策略暗示固有的分子约束,而不是适应性进化.
- 这项研究为探索其他系统中增强器策略的多样性提供了基础.
关键词:
D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. D. melanogaster. melanogaster. D. melanogaster. melanogaster. D. melanogaster. D. melanogaster. melanogaster. D.染色体是一种染色体.发展发展发展发展发展.发育生物学是发展生物学.增强剂是一种增强剂.基因表达的基因表达方式影像成像技术 影像成像技术图案设计 图案设计转录 转录 是一种转录.更多相关视频
10:01An Efficient Strategy for Generating Tissue-specific Binary Transcription Systems in Drosophila by Genome Editing
Published on: September 19, 2018
9.0K
06:21An Ecdysone Receptor-based Singular Gene Switch for Deliberate Expression of Transgene with Robustness, Reversibility, and Negligible Leakiness
Published on: May 7, 2018
6.5K
相关概念视频
Position-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
Exon 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
Alternative RNA Splicing
21.0K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.0K
Leaky Scanning
5.1K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.1K
