相关实验视频
Updated: Jun 13, 2025
08:50
A Nonsequencing Approach for the Rapid Detection of RNA Editing
Published on: April 21, 2022
2.6K
一种基于ortology的方法作为一种补充方法来检索进化保存的A-to-IRNA编辑站点
Jiyao Liu1, Tianyou Zhao1, Caiqing Zheng1
1Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing, China.
RNA biology
|September 11, 2024
概括
研究人员开发了一种新方法,在蜜蜂中找到RNA编辑部位,发现了传统方法遗漏的新,保存的部位. 这促进了对RNA编辑的理解.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 通过阿达尔酶调解的腺酸-酸 (A-to-I) RNA编辑对于甲基动物的发育,进化和适应至关重要.
- 精确检测RNA编辑部位对于理解它们的生物作用至关重要.
研究的目的:
- 开发和应用一种基于正统学的新方法来识别蜜蜂 (Apis mellifera) 中的RNA编辑部位.
- 为了补充传统的de novoRNA编辑检测管道,并发现以前错过的编辑站点.
主要方法:
- 利用了一种改进的蜜蜂基因组组合.
- 在传统的 de novo 管道旁边实施了一种新的基于正统学的方法,用于检测RNA编辑.
- 分析了种姓特定的编辑站点,包括自动记录事件.
主要成果:
- 确定了许多新的编码序列 (CDS) RNA编辑站点,其中许多在昆虫物种中得到了深度保护.
- 这些新发现的地点以前由于传统方法的严格假阳性控制而未被检测到.
- 发现了种姓特定的编辑站点,包括在Adar保存的Ile>Met自动记录站点,这表明在表型可塑性中发挥了作用.
结论:
- 一种基于补充的正统学方法可以增强功能性RNA编辑部位的检测.
- 这些发现有助于未来研究RNA编辑功能及其对生物体表型多样性的贡献.
- 保存的阿达尔重编码站点突出了RNA编辑在塑造eusocial昆虫复杂特征中的作用.
相关概念视频
02:23RNA Editing
8.9K
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
8.9K
01:49Conserved Binding Sites
4.2K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
4.2K
02:05Gene Evolution - Fast or Slow?
7.1K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.1K
02:07Improving Translational Accuracy
9.4K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
9.4K
00:43Bacterial RNA Polymerase
29.4K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
29.4K
01:53Bacterial Transcription
28.1K
RNA polymerase (RNAP) carries out DNA-dependent RNA synthesis in both bacteria and eukaryotes. Bacteria do not have a membrane-bound nucleus. So, transcription and translation occur simultaneously, on the same DNA template.
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
28.1K