関連する実験動画
Updated: Jun 20, 2026

13:19
Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
13C,15N-ポリ (ADP-リボース) の酵素合成と構造的特徴づけ
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
まとめ
研究者らは,重要な核酸ポリマーであるポリアドプリボース (PAR) を合成する新しい方法を開発しました. この画期的な発見は,NMRスペクトロスコーピーを用いた詳細な構造分析を可能にし,PARの理解を深める.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 構造生物学 構造生物学とは
背景:
- ポリアドプリボース (PAR) は,真核細胞における重要な核酸ポリマーで,多数の細胞プロセスに関与しています.
- その重要性にもかかわらず,PARの構造的特徴はほとんど不明のままです.
- PARの構造を理解することは,その多様な生物学的機能と疾患における役割を明らかにするために極めて重要です.
研究 の 目的:
- 構造的特徴化のために,同位体でラベル付けされたポリ (ADP-リボース) (PAR) を合成する方法を開発する.
- PAR分析のための多次元核磁気共鳴 (NMR) スペクトロスコピーの使用を可能にする.
- PAR-タンパク質の相互作用に関する将来の研究のためのツールを提供するために.
主な方法:
- ペントースリン酸,NAD+バイオシンセシス,およびコファクターリサイクル経路の統合を,ポリー (((ADP-リボース) ポリメラーゼ-1.1で行います.
- (13) C-グルコースと (13) C, (15) N-ATPを使用した (13) C, (15) N-ラベル PARのシングルポット合成.
- 多次元NMRスペクトロスコーピーを用いて合成されたPARの浄化と特徴付け.
主要な成果:
- 5μmolのATPから約400nmoleの精製された (13) C, (15) N-PARを効率的に合成する.
- 合成PARは,細胞抽出物によって生成されたPARと一致する行動を示した.
- (13) C, (15) N-PAR共鳴の明瞭な割り当ては,固有の規則的な構造の欠如を明らかにします.
- ポリマーは孤立した状態では構造化されていないように見えますが,タンパク質の相互作用で秩序ある構造が生じる可能性を示唆しています.
結論:
- ラベル付 PAR を合成するための堅固な方法が確立され,構造研究が容易になりました.
- 合成されたPARには固有の規則的な構造がなく,その構造的柔軟性を示す.
- PAR構造,特にタンパク質との複合体に関するさらなる研究は不可欠です.
- この標識されたPAR合成は,PAR-タンパク質複合体とその細胞機能と疾患における役割の調査のための重要なリソースです.
関連する概念動画
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...

