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複数のネイティブ状態は,RNAの折り畳み風景の持続的な荒らさを示しています
Sergey V Solomatin1, Max Greenfeld, Steven Chu
1Department of Biochemistry, Stanford University, Stanford, California 94305, USA.
Nature
|February 5, 2010
まとめ
RNAのような生物学的マクロモレキュルは,複数の異なるネイティブ状態に折り畳み,単一のエネルギー最小値の伝統的な見解に異議を唱えます. RNAの折りたたみの景観におけるこの荒らしさは,活発な形状に影響します.
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:
- 熱力学仮説は,マクロモレキュルの配列が,地球的なエネルギー最小値としてユニークなネイティブ構造を決定すると仮定しています.
- 大型マクロ分子のための複雑な折り畳み風景は,単一のグローバル最小値を超えた複数の安定した,活発な形状の存在についての疑問を提起します.
- いくつかのタンパク質は2つの状態の折り畳みモデルに従っているが,証拠は,相互変換する活性状態を持つより複雑な景観を示唆している.
研究 の 目的:
- 単一分子実験を用いてRNA酵素の折り畳み形状のトポロジーを調査する.
- RNA酵素が複数の異なるネイティブ状態に折り畳まれるかどうかを判断する.
- これらの本来の状態の間の相互変換の時間スケールを評価するために.
主な方法:
- RNAの折り畳みダイナミクスを調べるために単一分子実験を活用しました.
- RNA酵素のコンフォーマーションランドスケープを分析した.
主要な成果:
- RNA酵素が複数の異なるネイティブ状態に折り畳まれることを示した.
- これらの本来の状態間の相互変換は,触媒よりもはるかに長い時間スケールで発生することを示しました.
- 固有の構成空間まで広がるRNAの折り畳み風景の荒らさに関する証拠を提供した.
結論:
- RNA折り畳み風景は複雑で荒れ果てし,ネイティブ状態の構成空間にまで広がっています.
- 複数の,ゆっくりと相互変換するネイティブ状態の存在は,マクロ分子折り畳みの単純化されたモデルに挑戦しています.
- この発見は,RNAの機能と進化を理解するための意味を持つ.
関連する概念動画
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
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...
RNA Stability
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
RNA Stability
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...

