ノッチ・アンキリン・ドメインの折り畳み経路を,エネルギー景観を再構成することによって,リルーティングする
Katherine W Tripp1, Doug Barrick
1The T.C. Jenkins Department of Biophysics, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA.
Journal of the American Chemical Society
|April 10, 2008
まとめ
Notch ankyrinドメインのような繰り返しのタンパク質を,安定化繰り返しを加えることで設計すると,その折り畳みメカニズムが変化します. このタンパク質工学のアプローチは,局所的なエネルギーに基づいた折り畳み経路のルートを変更します.
科学分野:
- タンパク質エンジニアリングは,
- バイオフィジックス 生物物理学
- 構造生物学 構造生物学とは
背景:
- 繰り返しタンパク質はモジュラーであり,タンパク質の設計に適しています.
- コンセンサスで設計された繰り返しドメインは,熱安定性が向上しています.
- 以前の研究では,C端末の繰り返しを追加することによって,ノッチ・アンキリン領域のエネルギー景観を再構成することを実証しました.
研究 の 目的:
- エネルギー環境の再構成が,重複するタンパク質の折りたたみ機構にどのように影響するかを調査する.
- タンパク質構造の変化に対する折り畳み経路の反応を理解する.
- 折り畳み経路の選択における地域エネルギー学の役割を探求する.
主な方法:
- 保存されたアラニンの類似した置換をグリシンで各リピートで使用する.
- エンジニアリングされたNotch ankyrinドメインコンストラクタ (Nank1-5C1とNank1-5C2) の移行状態アンサンブルを分析する.
- 野生型と人工構造物の折りたたみ運動を比較する.
主要な成果:
- 中央の繰り返しの置換は,遅いワイルド型のノッチアンキリン領域の折りたたみ.
- C端末の置換は,エンジニアリングされたNank1-5C1とNank1-5C2のコンストラクションの遅い折り畳みを繰り返します.
- C末端の繰り返しを加えると,移行状態のアンサンブルがC末端に移動し,折り畳み経路が変化します.
結論:
- エンジニアリングリピートタンパク質は,安定するC端子リピートを追加することで,折り畳み経路をリルーティングします.
- ノッチ・アンキリン領域の折り畳み経路は,局所エネルギーに基づいて選択されます.
- この研究は,タンパク質構造,エネルギー環境,折り畳みメカニズムの関係についての洞察を提供します.
関連する概念動画
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Role Of Notch Signalling In Intestinal Stem Cell Renewal
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Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
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Protein Structure Is Critical to Its Biological Function
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