生物学的アミン輸送体に対する様々な抗うつ剤の作用の構造的基礎
Hui Wang1, April Goehring, Kevin H Wang
1Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, USA.
Nature
|October 15, 2013
まとめ
研究者らは,ヒトの生体性アミントランスポーター (BAT) を真似してバクテリアトランスポーターを設計し,SSRIやSNRIなどの抗うつ薬の構造研究を可能にしました. これは,これらの重要な薬物の共通の拘束力のある原則を明らかにします.
科学分野:
- 構造生物学 構造生物学とは
- 神経科学は神経科学である.
- 薬理学 薬理学とは
背景:
- バイオジェニック・アミン・トランスポーター (BAT) は神経伝達物質を調節し,抗うつ薬 (SSRI,SNRI,TCA) の標的である.
- ユカリオットのBATは構造的に研究するのが困難で,抗うつ剤のメカニズムについての理解を制限しています.
- バクテリアの同型である LeuT は構造モデルを提供しているが,ヒトの BAT 薬理学には欠けている.
研究 の 目的:
- ヒトのBATのような薬理を持つ細菌輸送機 (LeuT) を設計する.
- 抗うつ薬の結合と抑制の構造的メカニズムを解明する.
- BATに関するSSRI,SNRI,TCAの行動を規制する共通の原則を定義する.
主な方法:
- LeuTトランスポーターのエンジニアリングは,主要な結合ポケットの近くの残留物を変異させ,LeuBATを作成することによって行われます.
- セルトラリンを含む様々な抗うつ剤に対するLeuBATの結合 afinityの特徴.
- 抗うつ薬の4つのクラスとの複合体におけるLeuBATの12の結晶構造の決定.
主要な成果:
- エンジニアリングされたLeuBAT変異体は,ヒトのBAT薬理学を模倣して,SSRI,SNRI,TCAへの高親密度結合を示しています.
- 結晶構造は,さまざまな抗うつ剤が類似して結合し,トランスメブランヘリックス3を横断し,特定のヘリックスの間を挟むことを明らかにします.
- 抗うつ剤は,LeuBATを sodiumおよび chlorideイオンに結合した,外向きの開いた形状にロックします.
結論:
- エンジニアリングLeuBATは,ヒトのBATの薬理学を成功裏に再現し,構造研究の実行可能なモデルを提供します.
- 化学的に多様な抗うつ剤のBATへの結合を規定する共通の構造的原則.
- これらの発見は,SSRI,SNRI,TCAが分子レベルでどのように機能するかについての私たちの理解を前進させます.
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