人間のカンナビノイド受容体CB2の結晶構造
Xiaoting Li1, Tian Hua2, Kiran Vemuri3
1iHuman Institute, ShanghaiTech University, Shanghai 201210, China; School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Science, Chinese Academy of Sciences, Shanghai, China; University of the Chinese Academy of Sciences, Beijing 100049, China.
Cell
|January 15, 2019
まとめ
研究者は,ヒトのカンナビノイド受容体CB2が抗体と結合する構造を明らかにした. この発見は,エンドカンナビノイド系を調節することで,様々な病気の標的治療を開発するための新しい道を開きます.
科学分野:
- 構造生物学
- 薬理学について
- 免疫学
背景:
- カンナビノイド受容体CB2は主に免疫系に存在する.
- 選択的CB2調節は,炎症性,線維性,神経変性疾患の治療の可能性を提供し,CB1受容体の精神活性を回避します.
研究 の 目的:
- ヒトCB2の結晶構造を抗体AM10257で決定する.
- CB2とCB1受容体の機能と選択性の分子基礎を調査する.
- CB2受容体の活性化メカニズムについて理解を深める
主な方法:
- 人間のCB2-AM10257複合体のX線結晶学 (2.8 Å解像度)
- ミュタゲネシスの研究
- 分子ドッキングシミュレーション
主要な成果:
- CB2-AM10257の構造は,CB1と比較してユニークな結合姿勢を明らかにしました.
- アンタゴニスト結合CB2とアゴニスト結合CB1の構造的類似性は観察された.
- AM10257は,CB2対抗性とCB1対抗性という相反する機能的プロファイルを示した.
- 分子分析により,CB2とCB1の機能と選択性の根拠が明らかになった.
結論:
- この研究は,抗体と複合したヒトCB2の結晶構造を提供する.
- 発見は,エンドカンナビノイドシステムの正確な調節のための合理的な薬物設計を容易にする.
- CB2活性化メカニズムの洞察は,設計されたリガンドペアの分析によって提供されます.
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