相关实验视频
Updated: Jun 11, 2026

09:12
DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
Published on: September 16, 2019
选择性2'-基乙化分析通过对外核糖酶的保护进行分析
Kady-Ann Steen1, Arun Malhotra, Kevin M Weeks
1Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, USA.
Journal of the American Chemical Society
|July 6, 2010
概括
一种新的RNase检测的SHAPE方法通过直接量化添加物来准确地绘制RNA结构,克服了RNA结构分析传统原始扩展方法的局限性.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 选择性2'-基化通过原料延伸 (SHAPE) 分析是RNA结构和动态的关键方法.
- 传统的SHAPE在5'和3'末端解析RNA结构方面存在局限性,这是由于初始延伸检测.
- 在SHAPE中,初级扩展检测比化学修饰步骤复杂得多.
研究的目的:
- 开发一种用于直接量化RNA添加物的新方法.
- 为了克服SHAPE分析中原料扩展的局限性.
- 以提高分辨率分析RNA结构和动态,特别是在末端.
主要方法:
- 通过添加物抑制的外核核酶降解,对RNA中的共价添加物进行量化.
- 使用RNase R,一个3'-->5'外原核酶,它被RNA 2'-O-附加物阻断.
- 对氨酸铁酸盐 (TPP) рибо交换机阿普坦酶域结构的分析.
主要成果:
- 开发了RNase检测的SHAPE (选择性2'-基化,通过对外核酶的保护进行分析) 用于直接引导量化.
- 鉴定了在结合器结合时TPP рибо开关的局部核酸动力学和全球RNA结构的显著变化.
- 发现了一个单核酸膨胀寄存器偏移远离结合点,稳定了结合体结合结构.
结论:
- 与原始扩展相比,RNase检测的SHAPE为RNA结构分析提供了更直接和潜在的简单方法.
- 这种方法克服了RNA末端的解析问题,提供了更完整的结构信息.
- 通过RNase检测到的SHAPE广泛适用于小型非编码RNA和具有关键终端结构的RNA的结构分析.
相关概念视频
Restriction Enzymes
Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
Base Excision Repair
One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
The first step of...
Acetals and Thioacetals as Protecting Groups for Aldehydes and Ketones
Acetals are formed by reacting two equivalents of alcohol with carbonyl compounds like aldehydes or ketones. Acetals are unaffected by bases, nucleophiles, oxidizing agents, and reducing agents. They serve as protecting groups for aldehydes and ketones. Acetals can be easily formed and also easily removed via mild acid hydrolysis.
In the presence of multiple functional groups, when selective reduction of one group over the other is desired, groups like aldehydes and ketones that form acetals...
In the presence of multiple functional groups, when selective reduction of one group over the other is desired, groups like aldehydes and ketones that form acetals...

