相关实验视频
Updated: Aug 12, 2026

12:01
3' End Sequencing Library Preparation with A-seq2
Published on: October 10, 2017
一个U1/U4/U5 snRNP复合体,由一个2'-O-甲基-寡核酸补充U5 snRNA诱导
1Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520-8114, USA.
概括
这项研究表明,在核信使RNA拼接过程中,一种特定的寡核酸破坏了U4/U5/U6三snRNP复合体. 这种干扰促进了U1和U5 snRNP复合体形成所必需的相互作用.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
- 基因表达 基因表达
背景情况:
- 核信使RNA (mRNA) 拼接是一种复杂的过程,涉及拼接小核核核糖核蛋白粒子 (snRNP) 和众多蛋白质之间的复杂相互作用.
- 由U1,U2,U4,U5和U6 snRNP组成的结合体,协调了从前mRNA中精确去除内核的过程.
研究的目的:
- 调查U5 snRNP在结合体组装和功能早期阶段的作用.
- 为了阐明在拼接过程中snRNP之间的动态相互作用.
主要方法:
- 在U5小核RNA (snRNA) 中使用了2'-O-甲基-寡核酸 (BU5Ae) 补充特定核酸 (68-88).
- 通过生物化学测试分析了BU5Ae结合对结合体复合体的组成和相互作用的影响.
主要成果:
- 结合BU5Ae与U5snRNA,破坏了U4/U5/U6三snRNP复合体.
- 在BU5Ae治疗后,U2/U6 snRNP相互作用得到增强.
- 诱导了一种新的U1/U4/U5 snRNP复合物,该复合物与5'拼接位RNA序列进行了特定的相互作用.
结论:
- U1/U4/U5 snRNP 复合体代表了结合体组合中的过渡中间体.
- 这种复合体可能在5'拼接部位的U1 snRNP被U5 snRNP所取代的过程中发挥作用.
- 这些发现为在mRNA拼接过程中spliceosome内部的动态重排提供了新的见解.
相关概念视频
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Ribosomal RNA Synthesis
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
RNA-seq
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Ribosome Profiling
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Nucleic Acid Structure
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...

