大量のタンパク質ドメインの計算設計への道として対称性を探求する
Carie Fortenberry1, Elizabeth Anne Bowman, Will Proffitt
1Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States.
Journal of the American Chemical Society
|October 8, 2011
まとめ
研究者は,TIM-barrel superfold を採用する対称タンパク質 (FLR) を計算的に設計した. このエンジニアリングされたタンパク質は,分裂すると,容易に安定したホモジマーを形成し,タンパク質の設計原理を前進させます.
科学分野:
- 構造生物学 構造生物学とは
- コンピュータによるタンパク質設計.
- バイオケミストリー バイオケミストリー
背景:
- シンメトリック,ホモジメリックタンパク質は,エネルギー的好意性のために自然に豊富に存在します.
- 対称なスーパーフォールドは,対称なホモディマーの遺伝子複製と融合から進化したと提案されています.
研究 の 目的:
- ROSETTAソフトウェアを使用して,完全に対称なタンパク質変異体とそのホモジマーを計算工学的に設計する.
- タンパク質の安定性およびタンパク質ドメインのインシリコ構造の原理を調査する.
主な方法:
- コンピューティングエンジニアリングのためのROSETTAタンパク質設計ソフトウェアを使用しました.
- 結晶学を用いて,タンパク質の対称性を原子細部まで確認した.
- エンジニアリングされたタンパク質の二分化行動を調査しました.
主要な成果:
- シンメトリック (βα) 8 TIM-バレルの超折り合いを採用した溶性単体タンパク質 (FLR) を成功裏に設計しました.
- FLRは,二次構造の配置,配列,原子細部において二重の対称性を示しています.
- エンジニアリングされたタンパク質は分裂時に容易に二酸化し,意図された対称なホモジマーを形成します.
結論:
- FLRの計算設計は,タンパク質の安定性原理の理解における進歩を示しています.
- 小さい単位からより大きなタンパク質ドメインの in silico 構築のための実行可能な戦略を提示します.
- de novoタンパク質設計におけるコンピューティング・メソッドの可能性を強調する.
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