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相关概念视频

RNA Structure01:23

RNA Structure

78.1K
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...
78.1K
RNA Structure01:19

RNA Structure

6.5K
The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. 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) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
6.5K
Nucleic Acid Structure01:25

Nucleic Acid Structure

8.1K
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...
8.1K
Conservative Site-specific Recombination and Phase Variation02:53

Conservative Site-specific Recombination and Phase Variation

6.5K
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
6.5K
Types of RNA01:20

Types of RNA

8.5K
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
8.5K
RNA Editing02:23

RNA Editing

9.6K
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...
9.6K

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相关实验视频

Updated: Dec 10, 2025

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
09:12

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation

Published on: September 16, 2019

8.6K

通过DNA诱导结构选择性RNA功能化

Lu Xiao1, Maryam Habibian1, Eric T Kool1

  • 1Department of Chemistry, ChEM-H Institute and Stanford Cancer Institute, Stanford University, Stanford, California 94305, United States.

Journal of the American Chemical Society
|September 1, 2020
PubMed
概括

研究人员开发了以诱导循环 (RAIL) 的RNA转化,这是一种以DNA为导向的,用于特定站点的RNA功能化的方法. 这种技术能够精确标记和控制RNA分子,克服随机方法的局限性.

科学领域:

  • 生物化学
  • 分子生物学
  • 化学生物学

背景情况:

  • 网站特异性RNA功能化至关重要,但具有挑战性,特别是对于体外转录的RNA.
  • 现有的方法往往导致非基配对的2'-OH组发生随机变化,从而限制了精确的控制.
  • 局部RNA修饰具有多种应用的潜力,包括控制RNA功能和启用特定标签.

研究的目的:

  • 开发一种新的DNA导向策略,用于2'-OH组的选择性RNA功能化.
  • 为了在分子生物学和化学生物学中的应用中精确控制RNA修饰.
  • 克服随机RNA修饰方法的局限性.

主要方法:

  • 开发了一种利用互补DNA寡核酸的方法 - - 诱导循环中的RNA转化.
  • 辅助DNA探针在RNA中创建局部的空隙或循环,暴露特定的2'-OH组进行反应.
  • 用于在目标暴露的2'-OH位点进行高产.

主要成果:

  • 在RNA分子上,RAIL可实现高位特异性的2'-OH结合.
  • 确定了最佳的辅助寡氧核酸设计和反应条件.
  • 该方法成功控制了局部的 ribozyme 活动,并实现了 RNA 的双色光标记.

更多相关视频

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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Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism
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Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism

Published on: July 28, 2017

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相关实验视频

Last Updated: Dec 10, 2025

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
09:12

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation

Published on: September 16, 2019

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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

Published on: December 9, 2022

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Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism
11:37

Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism

Published on: July 28, 2017

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结论:

  • 该RAIL方法提供了一个简单而新的选择性RNA标记和控制策略.
  • 这种方法适用于各种长度和来源的RNA,具有广泛的实用性.
  • 在RNA功能化领域的进步,使RNA分子的精确操纵成为可能.