高度オーダーされたポリペプチドとUCST相分離行動
Sotaro Kuroyanagi1, Naohiko Shimada1, Shota Fujii2
1Department of Life Science and Technology , Tokyo Institute of Technology , 4259 B-57 , Nagatsuta, Yokohama 226-8501 , Japan.
Journal of the American Chemical Society
|January 1, 2019
まとめ
ステレオレギュラリティは熱反応性ポリマーの振る舞いに大きく影響する. ホモキラルポリペプチドは,高度な生体材料の洞察を提供する,高相分離温度と独特の集積パターンを表しています.
科学分野:
- ポリマー科学
- バイオマテリアル科学
- 材料化学
背景:
- 熱反応性ポリマーは 薬の投与と組織工学において 極めて重要です
- 高臨界溶液温度 (UCST) のポリマーの行動は十分に研究されていない.
- UCSTに対するステレオ規則性の影響を理解することは,材料設計の鍵です.
研究 の 目的:
- ポリペプチドのステレオレギュラリティが上位臨界溶液温度 (UCST) の行動に及ぼす影響を調査する.
- ホモキラルとラセミック・シトルリン基ポリペプチドの相分離と結合を比較する.
- これらの熱反応性ポリマーの構造的基礎と生物分解性を調査する.
主な方法:
- 異なるステレオレギュラリティを持つポリオルニチン-コシトルリン (POC) 変種の合成と特徴付け.
- 熱分析を用いた相分離温度 (Tps) の測定
- 円形二重化 (CD) と小角X線散射 (SAXS) による構造分析.
主要な成果:
- ホモキラルポリ・オルニチン・コ・リ・シトルリン (PlOC) とポリ・オルニチン・コ・リ・シトルリン (PdOC) は,ラセミックポリ・オルニチン・コ・リ・シトルリン (PdlOC) よりも高いTpsを示した.
- PdlOCは液体からコアセラートへの相分離を示し,PlOCとPdOCは固体のような積層を形成した.
- ホモキラルPOCはアルファヘリコ構造を採用し,ウレイド群の相互作用によって六角格子に組み立てられました.
結論:
- ステレオレギュラリティは,シトルリン基ポリペプチドのUCSTの振る舞い,相分離モード,および構造的組織を決定する.
- ホモキラルPOCで観察された螺旋の折りたたみと六角形の組み立ては,ペンデントウレイド群の相互作用に起因する.
- 段階分離構造は生物分解性に影響し,これらのUCSTタイプのポリマーが調節可能なバイオマテリアルアプリケーションの潜在力を強調します.
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