HIV抗体2G12に緊密に結合する2'-フッ素改変型,RNA支持型炭水化物クラスターの誘導進化
Richard L Redman1, Isaac J Krauss1
1Department of Chemistry, Brandeis University, 415 South Street MS 015, Waltham, Massachusetts 02454, United States.
Journal of the American Chemical Society
|June 7, 2021
まとめ
多価炭水化物リガンドを 生成するために 誘導進化を用いた新しい方法を開発しました このプラットフォームは,HIV抗体をターゲットにすることで示された,高親和結合のための最適のグリカンクラスタを設計します.
科学分野:
- 生物化学
- 分子生物学
- 薬物の発見
背景:
- 炭水化物結合タンパク質 (CBP) は,生物学的プロセスと病気において極めて重要です.
- 高親和の相互作用は,複数のグリカンがタンパク質に結合する多価性に依存する.
- 効果的な炭水化物ベースの治療法の開発には,グリカン表現の正確な制御が必要です.
研究 の 目的:
- 多価炭水化物クラスタリガンドの設計のための新しいプラットフォームを確立する.
- 安定したバックボーン上のグリカン・クラスタリングを最適化するために,指向進化を利用する.
- 特定の広範な中和抗体を標的とするリガンドを選択することによってプラットフォームを検証する.
主な方法:
- 機能的なRNAの配列を選択するために,指向された進化を用いる.
- 血清に安定した2'-フッ素改変RNA (F-RNA) の背骨を設計して,グリカンを作製する.
- 大量の配列プール (∼10^13) をスクリーニングして,高親和結合物質を検出する.
主要な成果:
- HIV抗体2G12に対する高い親和性を有するオリゴマンノース (Man9) グライカンのクラスターを成功的に選択した.
- 13から36nMの範囲で結合アフィニティを達成した.
- 強力な多価結合体を作るF-RNAプラットフォームの有効性を実証した.
結論:
- 誘導進化プラットフォームは,多価炭水化物リガンドの合理的な設計を可能にします.
- このアプローチは,広範に中和する抗体のような困難な標的に対する高親和結合剤の開発に有効です.
- F-RNAの骨格は,治療用途でグリカンクラスタの安定性と最適な表現を提供します.
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