PAZドメインの構造と保存されたRNA結合
Kelley S Yan1, Sherry Yan, Amjad Farooq
1Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York University, One Gustave L. Levy Place, New York, New York 10029-6574, USA.
Nature
|November 15, 2003
まとめ
RNAサイレンシングに不可欠なPAZドメインは,短いRNA分子を結合する. この研究は,アルゴナウトのタンパク質におけるその構造と保存されたRNA結合機能を明らかにしています.
科学分野:
- 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
- 遺伝学 遺伝学とは
背景:
- RNA媒介による遺伝子静止は,真核生物の遺伝子調節と抗ウイルス防御に不可欠です.
- DicerとArgonauteのタンパク質は,保存されたPAZドメインを特徴とする,これらの経路の重要なプレイヤーです.
- PAZドメインの生化学的機能は未だに曖昧である.
研究 の 目的:
- Drosophila melanogaster Argonaute 1 (Ago1) のPAZドメインの核磁気共振溶液構造を決定する.
- PAZドメインの生化学的機能,特にそのRNA結合能力を解明する.
主な方法:
- 核磁共振 (NMR) スペクトロスコピーは,Ago1 PAZドメインの3D構造を決定するために使用されました.
- RNAの結合を調査するために生化学的分析が行われました.
- 構造データと生化学データを統合して,RNA結合部位をマッピングした.
主要な成果:
- PAZドメインは,アルファヘリコプターキャップとベータヘアピン付属体を持つ,左利き,6本鎖のベータバレル構造を採用しています.
- PAZドメインは1:1ステキオメトリーで5核酸RNA分子を結合する.
- RNA結合表面はベータバーレルの開いた面にマッピングされ,結合RNAの5'-to-3'-オリエンテーションが定義されました.
- 人間のアルゴナウトタンパク質からのPAZドメインも,保存されたRNA結合機能を示す.
結論:
- PAZドメインの構造は,その分子構造を明らかにします.
- PAZドメインは,RNA静止経路に不可欠な短いRNAを直接結合する.
- 種間でのこの保存された機能は,遺伝子調節におけるPAZドメインの重要性を強調しています.
関連する概念動画
01:23RNA 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...
02:26Conservation of Protein Domains Over Different Proteins
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
01:49Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
01:23RNA 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...
01:49Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
01:19RNA 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...