タンパク質二次構造の可逆的なスイッチによって調節されるミセル密度
Rory E Sallach1, Min Wei, Nilanjana Biswas
1Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
Journal of the American Chemical Society
|September 7, 2006
まとめ
研究者らは,温度によってサイズと密度を変化させるスマートなタンパク質ミセルを設計した. このタンパク質折り畳みの移行は,刺激反応性薬剤投与システムに対する新しいアプローチを提供します.
科学分野:
- バイオマテリアル科学 バイオマテリアル科学
- ポリマー化学のポリマー化学について
- プロテイン工学は,タンパク質の
背景:
- タンパク質の二次構造は,逆戻り可能な突然の移行を経験することができます.
- このような移行は,応答性の高い材料の設計に活用することができます.
- アンフィフィリックタンパク質共ポリマーは,ナノ構造体への自己組み立ての可能性を提供します.
研究 の 目的:
- エラスティン-ミメティックペプチド配列を用いた"スマート"タンパク質ミセラーシステムを設計し,特徴づけること.
- 温度に誘発されたタンパク質の折りたたみがミセルの性質に与える影響を調査する.
- 刺激に反応する薬物の配送車両のための新しいメカニズムを確立する.
主な方法:
- タンパク質トライブロック共ポリマーを準備するために,再結合DNAの方法を使用しました.
- 逆移行温度 (Tt) 以下のおよびそれ以上の稀溶液におけるミセルの形成と性質を調査した.
- バイオ物理的技術を用いてミセルのコンパクト性とサイズの変化を分析した.
主要な成果:
- 開発されたアンフィフィリックタンパク質トライブロック共ポリマーは,Tt.以下でモノ分散ミセル (~100 nm R(H)) を形成します.
- ミセルの内部密度が急激に増加し,Tt.より上のサイズが小さくなることが観察されました.
- 構造の変化は,ヘリックスからシートへのタンパク質の折り畳み移行によって引き起こされることを示しました.
結論:
- タンパク質の二次構造の移行は",スマート"なミセラーシステムを設計するために制御的に利用できます.
- 温度によって引き起こされるタンパク質の折りたたみにより,ミセルの凝縮性とサイズが逆転的に変化します.
- これらのタンパク質ポリマーベースのミセルは,先進的な薬物投与アプリケーションのための新しいプラットフォームを表しています.
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