ヒトGLP-1受容体トランスメブランドメイン構造は,アロステル型調節剤の複合体である
Gaojie Song1, Dehua Yang2, Yuxia Wang1
1iHuman Institute, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China.
Nature
|May 18, 2017
まとめ
グルカゴン型ペプチド-1受容体 (GLP-1R) の構造的な洞察は,ネガティブなアロステル調節剤の共通の結合部位を明らかにする. この発見は,受容体の機能を理解し,新しい2型糖尿病治療法を開発するのに役立ちます.
科学分野:
- 構造生物学
- 薬理学について
- 内分泌学
背景:
- グルカゴン型ペプチド-1受容体 (GLP- 1R) とグルカゴン受容体 (GCGR) は,グルコースホメオスタシスにおける対極的な役割を持つクラスBのGPCRである.
- 陽性GLP- 1Rの調節は,インスリンとグルカゴン分泌を調節することによって,2型糖尿病の治療に不可欠です.
研究 の 目的:
- ネガティブアロステリックモジュール (NAM) によるGLP-1R阻害の構造的基礎を決定する.
- GLP-1Rの陰性および陽性アロステリック変調剤 (NAMおよびPAM) の潜在的なアロステリック結合部位を特定する.
主な方法:
- NAM (PF-06372222とNNC0640) を含むヒトGLP-1Rトランスメブラン領域のX線結晶学.
- 分子モデリングと変異性研究
主要な成果:
- 結晶構造は,V-VIIヘリクスの外にあるGLP-1RとGCGR NAMの共通の結合ポケットを明らかにした.
- 受容体は不活性な形状を採用し,NAMはヘリックスVIの動きを制限する.
- アゴニストのPAMは,V-VIヘリックスインターフェースの異なるサブポケットをターゲットにしています.
結論:
- GLP-1RとGCGRにおけるNAMの保存されたアロステリック結合部位を特定した.
- 構造データは,2型糖尿病のための新しいGLP-1R調節器の設計のための基礎を提供します.
- アロステル調節メカニズムの理解は,標的型GPCR療法の開発に役立つ.
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