相关实验视频
Updated: Jun 20, 2026

13:19
Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
酶合成和13C,15N-多 (ADP-ribose) 的结构特征
Heather L Schultheisz1, Blair R Szymczyna, James R Williamson
1Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, MB33, La Jolla, California 92037, USA.
Journal of the American Chemical Society
|September 18, 2009
概括
研究人员开发了一种新的方法来合成标记为poly ((ADP-ribose) (PAR),这是一个重要的核酸聚合物. 这一突破使得使用NMR光谱学进行了详细的结构分析,进步了我们对PAR的理解.
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:
- 聚ADP-ribose (PAR) 是真核细胞中重要的核酸聚合物,涉及到许多细胞过程.
- 尽管它很重要,但PAR的结构特征在很大程度上仍然未知.
- 了解 PAR 结构对于阐明其多样化的生物功能和疾病中的作用至关重要.
研究的目的:
- 开发一种合成同位素标记聚 (PAR) 的方法,用于结构性特征.
- 为了使多维核磁共振 (NMR) 光谱用于 PAR 分析.
- 为未来研究PAR蛋白相互作用提供一个工具.
主要方法:
- 整合酸,NAD+生物合成和辅因子循环途径与多 (ADP-ribose) 聚合酶-1.
- 使用 (13) C-葡萄糖和 (13) C, (15) N-ATP,合成 (13) C, (15) N-标记的 PAR.
- 使用多维NMR光谱学净化和表征合成的PAR.
主要成果:
- 从5μmol的ATP中有效合成大约400nmol的净化 (13) C, (15) N-PAR.
- 合成PAR表现出与细胞提取物产生的PAR一致的行为.
- (13)C, (15)N-PAR共振的明确分配,揭示了固有的正规结构的缺乏.
- 聚合物单独看起来是无结构的,这表明在蛋白质相互作用时可能存在有序结构.
结论:
- 已经建立了一个强大的合成标记PAR的方法,以促进结构研究.
- 合成的PAR缺乏内在的正规结构,表明其形状的灵活性.
- 对PAR结构的进一步研究,特别是与蛋白质复合的进一步研究是必不可少的.
- 这种标记PAR合成是研究PAR蛋白复合体及其在细胞功能和疾病中的作用的关键资源.
相关概念视频
Biosynthesis of Polysaccharides
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
Biosynthesis of Nucleic Acids
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
ATP and Macromolecule Synthesis
Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
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...

