複数の非自然なアミノ酸をコードする四重解読リボソームの進化を経由して
Heinz Neumann1, Kaihang Wang, Lloyd Davis
1Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.
Nature
|February 16, 2010
まとめ
科学者たちは,新しいリボソーム (ribo-Q1) を設計し,白色コドンを用いて,複数の非自然なアミノ酸をタンパク質に効率的に組み込むようにしました. このブレークスルーにより,精密なタンパク質工学と新しい生体材料の作成が可能になります.
科学分野:
- 合成生物学 合成生物学とは
- プロテイン工学は,タンパク質の
- バイオケミストリー バイオケミストリー
背景:
- 遺伝子コードの拡張により,設計アミノ酸を用いた精密なタンパク質特性修正が可能になります.
- 現在の方法は,遺伝子コードの完全な利用により,単一の非自然なアミノ酸の組み込みに限定されています.
研究 の 目的:
- タンパク質に効率的で多種多様な非自然なアミノ酸を組み込むためのシステムを開発する.
- 拡張された遺伝子コードを通じて新しいタンパク質の構造と機能を創造する.
主な方法:
- 四重体と珀色のコドンを解読するための正交ライボソーム (ribo-Q1) の合成進化.
- 特定の非自然なアミノ酸の認識のために,相互に直角なアミノアシル-tRNA合成酵素-tRNAペアの開発.
- オートゴーナルmRNAの空白コドンを用いて,異なった非自然なアミノ酸を直接組み込む.
主要な成果:
- Ribo-Q1.1によって空白コドンの効率的な解読が実証されています.
- タンパク質の特定の部位に異なった非自然なアミノ酸を成功裏に組み込みました.
- アジドおよびアルキンを含むアミノ酸のバイオオートゴナルサイクロアディションによる特定の,リドックス無感のタンパク質クロスリンクを設計しました.
- 200以上の非自然なアミノ酸の組み合わせをエンコードするためのプラットフォームを確立しました.
結論:
- 開発されたシステムは,現在の遺伝子コードの拡張の限界を克服し,多種の非自然なアミノ酸を正確に組み込むことができます.
- この技術は,非自然なポリマーを合成し,合成進化を進めるための基本的なツールを提供します.
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