哺乳類の細胞における,エンドプラズマの網膜とゴルギ装置の間の膀輸送を調節するタンパク質の相互作用
1Department of Molecular and Cellular Physiology, Stanford University School of Medicine, California 94305-5428, USA.
Cell
|April 4, 1997
まとめ
研究者らは,シス・ゴルギ膀輸送に不可欠なシンタキシン5を含むタンパク質複合体を特定しました. ERとGolgiのタンパク質を含むこの複合体は,これらの臓器細胞間の膀ドッキングと融合を調節する.
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.
- タンパク質の相互作用
背景:
- 膀輸送は,臓器細胞間のタンパク質の密輸に不可欠です.
- エンドプラズマ網膜 (ER) とゴルギ装置は,分泌経路の重要な臓器である.
- 特定のタンパク質複合体は,膀ドッキングと融合のイベントを媒介する.
研究 の 目的:
- ER-ゴルギの膀輸送に関与する新しいタンパク質複合体の特徴を明らかにする.
- この複合体内のタンパク質メンバーとその局所を特定するために.
- これらの相互作用を制御する規制メカニズムを理解する.
主な方法:
- タンパク質複合体の分離と特徴づけ.
- 免疫光顕微鏡で,タンパク質の局所を決定する.
- タンパク質の相互作用と再編成を研究するための生化学的分析.
主要な成果:
- シンタキシン5,GOS-28,rbet1,rsly1,ラットsec22b,およびメンブリンを含む複合体を特定しました.
- Syntaxin 5,rbet1,およびGOS-28は,ゴルギ膜に局所されている.
- ネズミのSec22bと膜はERに蓄積され,異なる起源を示しています.
- N-エチルマレイミド感受因子 (NSF) は,複合体内のタンパク質の相互作用を再構成する.
- 複合体は,相互排他的な関連を持つサブ複合体を形成する.
結論:
- 特定されたタンパク質複合体は,ERとGolgiの間の膀ドッキングと融合を媒介する.
- 複合体内の異なるタンパク質結合は,ドッキング/融合の信頼性に寄与する.
- この複合体は,分泌経路の完全性を維持する上で重要な役割を果たします.
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Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...
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