遺伝子でコードされた"化学弾頭"を持つタンパク質の進化
Chang C Liu1, Antha V Mack, Eric M Brustad
1Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
Journal of the American Chemical Society
|June 27, 2009
まとめ
私たちは,非自然なアミノ酸を使用してタンパク質を進化させるファグベースのシステムを設計しました. p-ボロノフェニララニン (BF) を組み込むことは,新しいグリカン結合タンパク質の開発に選択的な利点をもたらしました.
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:
- ファージベースのシステムは,タンパク質の進化を可能にします.
- 拡張された遺伝子コードは,非自然なアミノ酸を組み込むことを可能にします.
- 不自然なアミノ酸は,新しい機能を導入することができます.
研究 の 目的:
- タンパク質の進化における非自然なアミノ酸の有用性を調査する.
- p-ボロノフェニララニン (BF) が進化するグリカン結合タンパク質に選択的優位性を有するかどうかを判断する.
- タンパク質の機能を高めるための合成遺伝子コードの可能性を実証する.
主な方法:
- 細菌のタンパク質進化のためのファグベースのシステムの開発.
- 非自然なアミノ酸p-ボロノフェニララニン (BF) の組み込み.
- NNK-ランダム化されたV(H) CDR3ループを用いて,モデルアサイクリックアミノ糖に結合するための抗体変異体の選択.
主要な成果:
- 不自然なアミノ酸BFは,グリカン結合タンパク質の進化過程で選択的優位性を与えました.
- 偏りのない抗体ライブラリが,アミノ糖に結合するために選択されたとき,BFを含む変異体に収束した.
- 反応性非自然なアミノ酸を利用した炭水化物結合タンパク質の進化が成功していることが実証されています.
結論:
- BFを用いた合成遺伝子コードは,タンパク質の進化において選択的優位性を提供することができる.
- このアプローチは,タンパク質工学で利用可能な機能群のレパートリーを拡張します.
- 強化された機能を持つ炭水化物結合タンパク質を進化させるための基本的ステップを表しています.
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