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相关概念视频

Ribosome Profiling02:24

Ribosome Profiling

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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...
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RNA Structure01:23

RNA Structure

70.9K
Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
70.9K
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

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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,...
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RNA-seq03:21

RNA-seq

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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...
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Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

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RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
23.2K
RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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相关实验视频

Updated: May 30, 2025

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
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Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

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在真核RNA的结构探测数据中观察到的一致特征.

Kazuteru Yamamura1, Kiyoshi Asai1, Junichi Iwakiri1

  • 1Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561, Japan.

NAR genomics and bioinformatics
|January 31, 2025
PubMed
概括

在真核生物中分析RNA化学探测数据揭示了关键的见解. 高反应性表明溶剂暴露和已知的二次结构,但低反应性不能可靠地显示溶剂暴露.

科学领域:

  • 分子生物学分子生物学
  • 生物化学 生物化学
  • 基因组学就是基因组学.

背景情况:

  • 了解RNA结构对于其调节功能和治疗应用至关重要,例如mRNA疫苗.
  • 使者RNA (mRNA) 的结构显著影响RNA的稳定性和翻译效率.
  • 化学探测是研究活细胞内RNA结构的关键实验方法.

研究的目的:

  • 为了分析转录组规模的RNA化学探测数据在真核生物中.
  • 在RNA化学探测数据中识别共同特征和潜在偏差.
  • 改进RNA化学探测实验的解释.

主要方法:

  • 从真核生物体中现有的转录基因组规模RNA化学探测数据集的全面分析.
  • 在已知的RNA二次结构和溶剂可访问性方面对反应性模式的统计评估.
  • 在多个实验数据集中识别共同的趋势和特征.

主要成果:

  • 在大多数探测实验中,只有一小部分基因被修改了.
  • 前10%最具反应性的基准准确地反映了已知的RNA二次结构.
  • 高反应性基通常与暴露于溶剂的区域相对应,而低反应性不能可靠地表明暴露于溶剂.

更多相关视频

Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
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Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

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Identification of RNAs Engaged in Direct RNA-RNA Interaction with a Long Non-Coding RNA
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Identification of RNAs Engaged in Direct RNA-RNA Interaction with a Long Non-Coding RNA

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相关实验视频

Last Updated: May 30, 2025

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

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Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
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Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen

Published on: May 24, 2017

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Identification of RNAs Engaged in Direct RNA-RNA Interaction with a Long Non-Coding RNA
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Identification of RNAs Engaged in Direct RNA-RNA Interaction with a Long Non-Coding RNA

Published on: July 9, 2021

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结论:

  • RNA化学探测是推断细胞中的RNA结构和动态的一个有价值的工具.
  • 对数据偏差的认识,特别是关于低反应率的认识,对于准确的解释至关重要.
  • 这些发现为分析RNA化学探测数据提供了必要的指导方针,以更好地了解RNA结构-功能关系.