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Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading TED
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拡張シナプトタグミンによって媒介される,PI ((4,5) P ((2) 依存およびCa ((2+) 調節されたER-PM相互作用
Francesca Giordano1, Yasunori Saheki, Olof Idevall-Hagren
1Department of Cell Biology, Program in Cellular Neuroscience, Neurodegeneration, and Repair, and Howard Hughes Medical Institute, Yale School of Medicine, New Haven, CT 06510, USA.
Cell
|June 25, 2013
まとめ
拡張されたシンシタグミンタンパク質 (E-Syts) は,エンドプラズマ網膜をプラズマ膜に結合し,細胞生理を調節する. これらのE-Sytテザーは,カルシウムエントリーに関わるものとは異なる.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- エンドプラズマ網膜 (ER) - プラズマ膜 (PM) の接触は,細胞機能にとって極めて重要です.
- Ca ((2+) 入力規制はよく研究されているが,他のER-PMテザーが存在する可能性が高い.
- 拡張されたシンシタグミン (E-Syt) タンパク質は,どこにでも発現し,ER-PMテザリングに関与しています.
研究 の 目的:
- ER-PMのコンタクト形成におけるE-Sytsの役割を調査する.
- E-Syt媒介によるテザリングの分子機構と規制要因を決定する.
- E-Syt依存の接触者と,貯蔵中のカルシウム入りの接触者を区別するために.
主な方法:
- タンパク質の相互作用を研究するための生化学分析.
- ER-PMの接触部位を視覚化するためのセルラーイメージング.
- E-Syts.の機能を評価するための遺伝子操作.
主要な成果:
- E-Sytsは,PMとC2ドメインの相互作用を通じて,ER-PMのテザーとして機能します.
- E-Syt2とE-Syt3にはPI (4,5) P2が必要で,E-Syt1には高濃度の細胞溶液Ca (,2+) が必要である.
- E-Sytsはヘテロメア複合体を形成し,接触形成にCa2+) 調節を与えます.
- E-Sytに依存するコンタクトは,店舗で運用されるCa2+) エントリーとは独立しています.
結論:
- E-Sytsは,機能的に異なるER-PMの連絡先の形成を仲介しています.
- これらのE-Syt依存のコンタクトは,Ca2+) 調節を超えて,細胞生理学において一般的な役割を果たします.
- E-Sytによるテザリングは,STIM1/Orai1に依存するメカニズムとは異なる.
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