ヒトのCCケモカイン受容体7におけるアロステリックリガンド認識の構造的基礎
Kathrin Jaeger1, Steffen Bruenle1, Tobias Weinert1
1Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI.
Cell
|August 24, 2019
まとめ
研究者は,CCキモカイン受容体7 (CCR7) の結晶構造をリガンドに結合させ,アロステル結合部位を明らかにした. この発見は,CCR7媒介の転移を標的とした新しいがん治療法の開発に役立ちます.
科学分野:
- 構造生物学
- 免疫学
- 薬理学について
背景:
- CCキモカイン受容体7 (CCR7) は免疫細胞の取引を調節し,ホメオスタシスと癌の転移の両方に不可欠です.
- リンパ節転移におけるCCR7の役割は,腫瘍学における重要な治療目標となっています.
研究 の 目的:
- CCR7 リガンド結合の構造的基礎を解明する.
- 癌治療のためのCCR7の新しいアロステリック調節剤を特定し,特徴づけること.
主な方法:
- シアリダース NanAに溶融したヒト CCR7 のX線結晶学で2.1 Åの解像度.
- 化合物の貯蔵庫のシリコンスクリーニング
- 化合物の識別のための自動熱安定性スクリーニング.
主要な成果:
- 結晶構造は,Giタンパク質の結合部位の近くの細胞内アロステリックポケットに結合したリガンド (Cmp2105) を明らかにした.
- スルフォナミド分子は,トランスメブランヘリックス7とヘリックス8の間に保存された残留物と相互作用することが観察されました.
- 新しいCCR7調節剤 (CS-1,CS-2) と,既知のCXCR1- CXCR2抗体 (ナバリキシン) が特定されました.
結論:
- 構造的な洞察は,アロステルCCR7抗体の合理的な設計を容易にする.
- 特定された変調剤は,多標的がん治療戦略の可能性を秘めている.
- このアプローチにより,ケモカイン受容体アンタゴニストの効率的な発見と調節が可能である.
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