相关实验视频
Updated: Jul 22, 2026

11:32
Mapping RNA-RNA Interactions Globally Using Biotinylated Psoralen
Published on: May 24, 2017
同源RNA的结构多样性的基础
Andrey S Krasilnikov1, Yinghua Xiao, Tao Pan
1Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, Evanston, IL 60208, USA.
概括
大型RNA分子,如 ribozymes 折叠成特定的结构活动. 这项研究揭示了Ribonuclease P中的替代折叠模式,尽管有不同的二级和三级折叠,但显示了类似的核心结构.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 生物化学 生物化学
背景情况:
- 大型RNA分子,包括 ribozymes,采用特定的三级结构,对于它们的生物功能至关重要.
- 在功能上相似的 ribozymes 中,二级结构的变化表明了替代三级折叠的可能性.
- 核糖核酶P (RNase P) 是tRNA成熟的必不可少的核糖酶,不同类型 (例如A型和B型) 具有不同的特征.
研究的目的:
- 确定和比较A型核糖核酶P的特异性域的晶体结构.
- 调查A型核糖核酶P活性的结构基础,并将其与B型核糖核酶P进行比较.
- 了解如何替代的二级和三级结构可以导致类似的功能结果在 ribozymes.
主要方法:
- 采用X射线晶体学,确定了A型核糖核酶P.161核酸特异性域的高分辨率晶体结构.
- 在A型和B型核糖核酶P特异性域之间进行了比较结构分析.
- 生物化学分析被潜在地用于确认功能方面,尽管在抽象中没有明确详细说明.
主要成果:
- 与B型分子相比,A型核糖核酶P特异性域的晶体结构显示出明显的二级和三级结构.
- 尽管存在结构上的差异,但A型和B型特异性领域的三维核心结构是非常相似的.
- 这种保存的核心几何结构是通过不同的稳定相互作用和不同的辅助结构元素来维持的.
结论:
- A型核糖核酶P的特异性域表现出独特的结构特征,但与其B型对应物共享一个保存的核心折叠.
- 替代折叠途径可以导致大型RNA分子中类似的功能架构,突出显示RNA结构-功能关系的稳定性.
- 了解这些替代折叠提供了对RNA演变的洞察力,以及控制RNA三级结构形成和稳定的原则.
相关概念视频
Nucleic acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
RNA Structure
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...
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...
Nucleic Acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
RNA Structure
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...
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...
RNA Structure
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...
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...
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...

