TRPとTRPLの共同組み立てにより,店舗で動作する独特の伝導性が得られます
1Department of Biological Chemistry, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Cell
|June 27, 1997
まとめ
トランジエント受容体ポテンシャル (TRP) とTRP型タンパク質 (TRPL) は新しいイオンチャネルを形成する. 同発現は,ドロソフィラの光受容体において,貯蔵された電流を媒介する異多複合チャネルを明らかにする.
科学分野:
- 分子および細胞生物学
- 神経科学は神経科学である.
- イオンチャンネル生理学 イオンチャンネル生理学
背景:
- ドロソフィラの網膜特異性タンパク質である一時受容体ポテンシャル (TRP) は,保存された貯蔵操作チャネル (SOC) 家族の創設メンバーです.
- 実験室内研究では,TRPはSOCとして機能し,関連するタンパク質であるTRPLは構成的に活性であると示唆されています.
研究 の 目的:
- TRPとTRPLを共発するタンパク質の機能的影響を調査する.
- ドロソフィラの光受容体細胞における光活性化された電流の背後にあるメカニズムを決定する.
主な方法:
- TRP と TRPL の共表現は,適切な表現システムで表される.
- イオンチャネル電流を特徴付けるための電気生理学的記録.
- TRP-TRPL関連性を評価するためのタンパク質相互作用研究.
主要な成果:
- TRPとTRPLの共同発現により,TRPまたはTRPLだけで生成される電流とは異なる,独特の貯蔵された,外向きの整正電流が生成されます.
- TRPとTRPLサブユニットの間の直接的な相互作用が確認されました.
- 観測された電流は,TRPとTRPLによって形成された異多重チャネルによって媒介されます.
結論:
- TRPとTRPLのタンパク質は直接相互作用し,機能的なヘテロマルチメリックチャネルを形成する.
- これらのTRP-TRPLヘテロマルチメーターは,光受容体細胞の貯蔵電流に寄与する.
- 光受容体内の光活性化された電流は,TRPホモマルチマーとTRP-TRPLヘテロマルチマーの組み合わせによるものと思われる.
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