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Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library
Published on: June 20, 2014
アンフィパシーペプチド (AAKA) nの集積を反パラレルベータシートにします
Thomas J Measey1, Reinhard Schweitzer-Stenner
1Department of Chemistry, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA.
Journal of the American Chemical Society
|October 13, 2006
まとめ
ヘリクスを形成するように設計されたペプチドは,ベータシート構造を持つヒドロゲルに驚くほど自己組織化します. この予期せぬベータシート形成は,陽性電荷のライシン残留物でも発生し,典型的なペプチド自己組み立ての期待に挑戦します.
科学分野:
- バイオケミストリー バイオケミストリー
- マテリアルサイエンス 材料科学
- 超分子化学 超分子化学
背景:
- アンフィパティックリピートユニット (Ac-(AAKA) n-NH2) のペプチドは,螺旋構造を形成すると予測されています.
- 螺旋状の車輪の投影は,これらのAc-(AAKA) n-NH2ペプチドのアンフィパティックな性質を示しています.
- 一般的に,より高い残留量は,水溶液における螺旋状の形成を好むと予想されます.
研究 の 目的:
- 水溶液中のAc-(AAKA) n-NH2ペプチドの自己組み立て行動を調査する.
- これらのペプチドが異なる濃度で採用した二次構造を決定する.
- ペプチドの自己組織化により,より高次元の構造を形成する要因を理解する.
主な方法:
- 二次構造を評価するために,円形の二重化 (Circular Dichroism, ECD) のスペクトロスコーピーを用いた.
- ペプチド濃度は,自己組立に対する影響を観察するために変化した.
- ハイドロゲル形成はマクロスコープで観察されました.
主要な成果:
- Ac-(AAKA) 4-NH2およびAc-(AAKA) 3-NH2ペプチドは,ミリモラー濃度でいくつかの螺旋性含有物を示した.
- 驚くべきことに,センチモラ濃度では,これらのペプチドは水素ゲルを形成しました.
- ヒドロゲルは,螺旋的な期待に反して,反パラレルベータシート形状によって特徴付けられました.
結論:
- アンフィパティックAc-(AAKA) n-NH2ペプチドは,反パラレルベータシート形状を採用することができます.
- これらのペプチドは,より高い濃度でヒドロゲルに自己組み立てられ,螺旋的な傾向を覆します.
- 充電されたライシン残留物の存在を考えると,βシート構造の形成は予想外です.
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