人間のセロトニントランスポーターのX線構造とメカニズム
Jonathan A Coleman1, Evan M Green1, Eric Gouaux1,2
1Vollum Institute, Oregon Health &Science University, Portland, Oregon 97239, USA.
Nature
|April 7, 2016
まとめ
セロトニントランスポーター (SERT) の構造的な洞察は, (S) - シタロプラムとパロキセチンのような抗うつ薬がどのように結合するかを明らかにします. これらの薬は,SERTを外側に開いた状態に閉じることで,セロトニンの再吸収を阻害し,将来の抗うつ薬の設計に情報を与えます.
科学分野:
- 神経科学
- 構造生物学
- 薬理学について
背景:
- セロトニントランスポーター (SERT) は,神経伝達物質の再吸収を通じてセロトニン信号伝達を調節する.
- SERTは抗うつ薬や精神刺激薬の主要標的です
- SERTの構造を理解することは 効果的な薬の開発に不可欠です
研究 の 目的:
- 抗うつ薬に結合した人間のSERTの高解像度のX線結晶構造を決定する.
- (S) シタロプラムとパロキセチンの結合メカニズムを分子レベルで解明する.
- いくつかの抗うつ薬のアロステリック作用の構造的基礎を提供する.
主な方法:
- 3.15 Å の解像度のX線結晶学
- (S) シタロプラムとパロキセチンの共同結晶化
- リガンド結合部位と構成状態の構造分析
主要な成果:
- 構造は抗うつ剤が 中央部位に結合し セロトニンを阻害することを示しています
- この結合は,SERTを外側に開いた形状にロックします.
- アロステリックサイトが特定され, (S) - シタロプラムのアロステリック活性が説明されました.
結論:
- この研究は,SERTに対する抗うつ薬の作用の分子メカニズムを定義しています.
- SERTを標的とする新薬の合理的な設計のための構造設計図が提供されています.
- これらの発見は,神経伝達物質の運搬機能と薬理学に関する理解を深めています.
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