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RTPファミリーのメンバーは,哺乳類の嗅覚受容体の機能的発現を誘導する
Harumi Saito1, Momoka Kubota, Richard W Roberts
1Department of Molecular Genetics and Microbiology, Duke University Medical Center, Research Drive, Durham, NC 27710, USA.
Cell
|November 20, 2004
まとめ
RTP1およびRTP2タンパク質は,Gタンパク質結合受容体 (GPCRs),特に臭味受容体 (ORs) の細胞表面発現を促進する. これらのタンパク質は,嗅覚ニューロン機能と嗅覚リガンド検出に不可欠です.
科学分野:
- 分子生物学は分子生物学である.
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
背景:
- Gタンパク質結合受容体 (GPCRs) は,リガンド結合のために細胞表面の局所化を要求する.
- 哺乳類の嗅覚受容体 (ORs) は,異質的に発現すると,細胞表面表現が悪い.
研究 の 目的:
- ORsの細胞表面発現におけるトランスメブランタンパク質の役割を調査する.
- HEK293T細胞における機能的OR発現を高める要因を特定する.
主な方法:
- HEK293T細胞におけるORの異質表現.
- 候補トランスメブランタンパク質RTP1,RTP2およびREEP1.1との共発現.
- 細胞表面表現とオドラント誘発反応の評価.
主要な成果:
- RTP1とRTP2は,ORsの機能的な細胞表面発現を著しく促進する.
- RTP1とRTP2は,ORと関連付けられ,嗅覚応答を高めます.
- REEP1は弱く,同様の効果を示し,RTP1/RTP2は嗅覚ニューロンで特異的に発現する.
結論:
- RTP1とRTP2は,プラズマ膜へのOR転位とOR機能の重要なレギュレーターです.
- このシステムは,ORの化学的選択性をスクリーニングし,オドラント・リガンドを特定するためのプラットフォームを提供します.
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