オキサゾリジン-2-オンを含む偽ペプチドは,ベータ曲線のリボンスパイラルに折りたたまれています
Claudia Tomasini1, Gianluigi Luppi, Magda Monari
1Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum Università di Bologna, Via Selmi 2, 40126 Bologna, Italy. claudia.tomasini@unibo.it
Journal of the American Chemical Society
|February 16, 2006
まとめ
特定のオキサゾリジノーン (Oxd) グループを持つオリゴマーは合成され,分析されました. B組のオリゴーマーには,オーダーされたベータ・ベンド・リボン・スパイラル・構造,すなわち3・10・ヘリックス・サブタイプを形成する能力があることが示された.
科学分野:
- ペプチド化学 ペプチド化学
- 超分子化学とは
- 有機合成による有機合成です.
背景:
- 4-カルボキシ-5-メチロキサゾリジン-2-オン (Oxd) 部分を含むオリゴーマーを合成した.
- これらのオリゴマーの折り畳みを有序な構造に調査することは,それらの性質を理解するために不可欠です.
研究 の 目的:
- Oxd分子を含んだ3組のオリゴマーを合成・分析した.
- これらのオリゴーマーが順序付けられた構造に折りたたむことができるかどうかを判断する.
- 折り畳みオリゴーマーによって採用された特定の二次構造を特定する.
主な方法:
- 3つのオリゴーマーセットの合成: Boc- ((L-Ala-L-Oxd) ((n) -OR, Boc- ((L-Ala-D-Oxd) ((n) -OR,そして Boc- ((Aib-L-Oxd) ((n) -OR.
- IR吸収,NMR,およびサークルダイクロイズム (CD) のスペクトロスコピーを用いた好ましい形状の分析.
- オキシド分子の剛性,分子内H結合,C=O...H-N H結合を含む安定効果の評価.
主要な成果:
- 3つの安定効果が特定されました:硬いOxd部分 (トランス構成),Oxd C=O...H-(alpha) C H-結合,および1 $\leftarrow$ 4の分子内C=O...H-N H結合.
- B組オリゴーマー[Boc-(L-Ala-D-Oxd) ((n) -OR) ]だけが,3つの安定化要件を満たしていた.
- CDスペクトル解析により,B組オリゴーマーがベータ曲線リボン渦巻き二次構造,すなわち3~10-ヘリックス亜型を採用することが明らかになった.
結論:
- B組のオリゴーマーには,秩序ある構造を形成する傾向がある.
- 特定された二次構造はベータ曲線のリボンスパイラルであり,特定のタイプの3(10) -ヘリックスです.
- この研究は,Oxdを含むオリゴマーの構造的好みを明らかにします.
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