ネイティブ化学結合におけるペプチジルプロリルチオエステルの内部活性化
Yue Gui1, Lingqi Qiu1, Yaohao Li1
1State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Haidian District, Beijing 100191, China.
Journal of the American Chemical Society
|March 17, 2016
まとめ
この研究は,ネイティブ化学結合 (NCL) でプロリルチオエステルを使用したペプチド合成の改良された方法を導入しています. 新しい内部活性化プロトコルは,これらの挑戦的な結合の反応性を高め,効率的なペプチド結合形成を可能にします.
科学分野:
- 有機化学
- 生物化学
- ペプチド合成
背景:
- プロリルチオエステルは,アラニルチオエステルと比較してネイティブ化学結合 (NCL) の反応性が低い.
- プロリンを含むペプチドの効率的な合成は,様々な生物学的用途に不可欠です.
研究 の 目的:
- NCLにおけるペプチジルプロリルチオエステルの温和で効率的な内部活性化プロトコルを開発する.
- ペプチド結合反応におけるプロリルチオエステルの固有の低反応性を克服する.
主な方法:
- C端のプロリンに4マーキャプタン置換剤を導入し,バイサイクルチオラクトン中間物質を形成する.
- 反応速度を従来の方法と比較するための運動研究.
- 結合経路の解明のためのメカニズム研究
主要な成果:
- 4 メルカプトプロリルチオエステルプロトコルは,NCLにおけるプロリルチオエステルの反応性を著しく高めます.
- 反応速度はアラニルチオエステルと同等であることが判明した.
- 結合はNCLのような経路で進行し,化学選択性とサイドチェーン互換性を確保する.
- 効率的なワンポット・リガション・デスルフライゼーション手順が確立された.
結論:
- 開発されたプロトコルは,プロリルチオエステルを含むペプチドを合成するための堅固な方法を提供します.
- この進歩は,ウィルムズ腫瘍タンパク質1の断片の合成によって示されたプロリンに富んだペプチド配列の効率的な構築を容易にする.
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