非自然なペプチドのリボソーム合成
Kristopher Josephson1, Matthew C T Hartman, Jack W Szostak
1Howard Hughes Medical Institute, and Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
Journal of the American Chemical Society
|August 18, 2005
まとめ
研究者はリボソームを再プログラムして,非自然なアミノ酸でペプチドを合成し,新しい機能的分子を発見するための広大なライブラリを作成しました. この進歩により,潜在的治療用途を持つユニークなペプチドの選択が可能になります.
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.
- 合成生物学 合成生物学とは
背景:
- リボソームは非自然なアミノ酸からペプチドを合成することができ,多様な分子図書館の作成を可能にします.
- In vitro選択技術は,機能性ペプチドやタンパク質の識別に不可欠です.
研究 の 目的:
- 非自然なアミノ酸を使用して,非生物学的ポリマーと薬物のようなペプチドの組み合わせライブラリを合成する方法を開発する.
- リボソーム合成とインビトロ選択による希少な機能性分子の識別を可能にする.
主な方法:
- 再構成されたE. coliのトランスレーションシステムを使用して,35の感覚コドンを12の非自然なアミノ酸アナログに再割り当てました.
- 10種類の異なった非自然なアミノ酸を含む単一のペプチドの合成を指揮した.
- 大規模な非自然なペプチドライブラリを合成するためのmRNAディスプレイとの互換性が実証されています.
主要な成果:
- 一つのペプチドに複数の非自然なアミノ酸を組み込むために,遺伝子コードを成功裏に再プログラムしました.
- mRNA-displayを使用して,10^14のユニークなメンバーを持つ不自然なペプチドライブラリを生成しました.
- 変異性アミノアシル-tRNA合成酵素と翻訳後の修正を用いて化学空間を拡大する方法を紹介した.
結論:
- 非自然なアミノ酸を含むペプチドのリボソーム合成のための新しいシステムを開発しました.
- 機能的な非自然な分子の in vitro 選択のためのプラットフォームを確立しました.
- 非自然のアミノ酸による循環性ペプチドの酵素合成の道を開き,非リボソーム性ペプチドを模倣した.
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