調節可能なペプチド断片化のためのバイオコンジュガート:フリーラジカル誘発ペプチド配列化 (FRIPS)
Robert Hodyss1, Heather A Cox, J L Beauchamp
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Journal of the American Chemical Society
|September 8, 2005
まとめ
新しい方法は,フリーラジカルイニシアターを使用して,質量スペクトロメーターでペプチドを断片化します. この技術は主にz型断片を生成し,ガス相タンパク質配列化を進める.
科学分野:
- 質量スペクトロメトリによる質量スペクトロメトリです.
- 化学分析 化学分析について
- プロテオミクスはプロテオミクスを用います.
背景:
- ペプチドの断片化は,タンパク質の配列決定に不可欠です.
- Collision-Activated Dissociation (CAD) やElectron Capture Dissociation (ECD) などの既存の方法には,限界がありますが,現在では,その限界を明らかにしています.
- 新しい断片化技術の開発は,プロテオミクスの進歩に不可欠です.
研究 の 目的:
- フリーラジカルイニシアターを使用してペプチドの断片化のための新しい方法を導入する.
- Vazo 68-ペプチド結合体によって生成される断片化パターンを調査するために.
- ガス相タンパク質配列解析におけるこの方法の可能性を評価する.
主な方法:
- フリーラジカルイニシアターであるVazo 68をペプチドと結合する.
- コンジュガートをイオントラップ質量スペクトロメーターに電気スプレーする.
- 根性種の衝突活性化によって断片化を誘導する.
主要な成果:
- Vazo 68-ペプチド結合体は,衝突活性化時にフリーラジカルを生成します.
- これらのラジカルはペプチドの骨格分裂を誘導し,主にz型断片を形成する.
- アンジオテンシンII-Vazo 68結合体の分析により,潜在的な水素原子抽出部位が明らかになりました.
結論:
- このラジカル・イニシアチブ・フラグメンテーション・メソッドは,既存の技術に対する有効な代替手段です.
- 生成されたz型断片は,貴重な配列情報を提供します.
- このアプローチは,完全ガス相タンパク質配列化に向けた重要な一歩を意味する.
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