短ペプチドから高活性でエナチオスペシフィックなメタロ酵素の進化
Sabine Studer1, Douglas A Hansen1, Zbigniew L Pianowski1
1Laboratory of Organic Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
Science (New York, N.Y.)
|December 15, 2018
まとめ
科学者は単純なペプチドから 機能的な酵素を作りました この研究は,初期の生命が金属イオンを使って 基本的なペプチドから複雑なタンパク質を 進化させたことを示しています
科学分野:
- 生物化学
- 進化生物学
- 合成生物学
背景:
- 現代のタンパク質には 原始的な配列のサインがあり 単純なペプチドからの古代の起源を示唆しています
- 短いペプチドは通常,安定した構造を欠いているが,金属イオンは初期の進化で機能的なバイオ分子に組み立てられるのを容易にしたかもしれない.
研究 の 目的:
- 機能性酵素へのペプチド組成のテンプレート化における金属イオンの可能性を調査する.
- 設計と実験室での進化を通してペプチドを酵素に変換することによって,生物学的シナリオを再現する.
主な方法:
- 合理的な設計と 実験室での進化のテクニックを組み合わせたものです
- 亜鉛結合ペプチド基板を中心に 球状酵素を設計した
主要な成果:
- ペプチドをエステル分裂活性を持つ球体酵素に成功させた.
- 高い触媒効率 (kcat/KM ~ 10^6 M^-1 s^-1) と厳格なエナチオ特異性を達成した.
- 素朴なペプチドの構造と機能の同時最適化が実証された.
結論:
- この研究は,単純なペプチドから複雑な構造への酵素発達の可能性のある進化の経路を示しています.
- 初期の生化学的進化における金属イオンの可能性を強調する.
- 将来の酵素設計と工学への洞察と機会を提供します.
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