ペプチドエピトープと天然製品の断片を組み合わせたマクロサイクル方式
Stéphanie M Guéret1,2, Sasikala Thavam3, Rodrigo J Carbajo4
1Department of Chemical Biology, AstraZeneca-Max Planck Institute Satellite Unit, Max-Planck-Institute of Molecular Physiology, 44227 Dortmund, Germany.
Journal of the American Chemical Society
|February 15, 2020
まとめ
研究者は"ホット・ループ"タンパク質のセグメントを真似るために 自然製品にインスパイアされた構造を用いた新しい方法"PepNats"を開発しました このアプローチは,標的タンパク質の相互作用のために構造的に制約されたペプチドを生成し,新しい治療候補を生成する.
科学分野:
- 薬剤化学
- 構造生物学
- 生物化学
背景:
- "ホットループ"タンパク質セグメントは,その変数構造のためにタンパク質相互作用に不可欠です.
- これらのダイナミックな領域を模倣することは 薬の発見には困難ですが 必須です
研究 の 目的:
- タンパク質の"ホットループ"を 形状的に制約した模倣を作るための新しい方法である PepNats を導入する.
- 誘導性酸化窒素合成酵素 (iNOS) とヒトアグウチ関連タンパク質 (AGRP) のホットループから派生したPepNatsを合成し,特徴づけること.
- これらのPepNatsの結合親和性と選択性をそれぞれの生物学的標的に評価する.
主な方法:
- 自然製品 (NP) にインスパイアされた構造をマクロサイクルペプチドに組み込む.
- イミン形成によるマクロサイクリングを用いた固体相合成.
- 形状的制約のためのステレオ選択的1,3-二極サイクル加法.
主要な成果:
- iNOSとAGRPのホットループからマクロサイクルのPepNatを合成しました.
- iNOSから派生したPepNatsは,SPRYドメインを含むSOCSボックスタンパク質2 (SPSB2) に対して強力なリガンド活性を示した.
- AGRPから派生したPepNatsは,メラノコルチン (MC) 受容体に対する選択的リガンド活性を示した.
結論:
- NPインスピレーションの断片の絶対的構成がペプチドの構成と結合特性を決定する.
- ペプチドエピトープとNPエスカフォルドを組み合わせると,効果的なホットループミミクスが得られます.
- PepNatsは,治療的可能性を持つ形状的に制約されたペプチドを開発するための有望な戦略です.
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