エンドプラズマ網膜とゴルギ・スタック間の膀輸送には,NEM感受性融合タンパク質が必要である
C J Beckers1, M R Block, B S Glick
1Department of Molecular Biology, Scripps Clinic and Research Foundation, La Jolla, California 92037.
Nature
|June 1, 1989
まとめ
N-エチルマレイミド感受性融合タンパク質 (NSF) は,ゴルギウム内の膀輸送に不可欠です. この研究では,NSFは,エンドプラズマの網膜からゴルギの輸送に不可欠であることを示し,分泌経路のための膜融合におけるその一般的な役割を強調しています.
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.
- タンパク質の機能 タンパク質の機能
背景:
- 膀輸送は,分泌経路内のタンパク質の輸送に不可欠です.
- N-エチルマレイミド感受性融合タンパク質 (NSF) は,ゴルギ・スタック内の輸送を媒介することが以前から知られていた.
研究 の 目的:
- エンドプラズマ網膜 (ER) とゴルジ装置の間の輸送におけるNSFの役割を調査する.
- NSFが分泌経路における膜融合機械の一般的な構成要素であるかどうかを判断する.
主な方法:
- ゴルギの膀輸送を触媒化する能力に基づくNSFの浄化.
- 半無傷の細胞を用いて,ERをゴルギ輸送に測定する.
- 輸送を阻害するためにNSFに対するモノクローナル抗体を用いること.
- N-エチルマレイミドを用いてNSFのスルフヒドリル群の役割を評価した.
- 浄化されたNSFを加えることで輸送の回復.
主要な成果:
- NSFは,ERからGolgiスタックへの輸送には,半完全な細胞で必要である.
- NSFに対するモノクローナル抗体とN-エチルマレイミド治療は,ER-Golgi輸送を阻害しました.
- 浄化されたNSFの追加は,ER-Golgi輸送を回復し,その必要性を確認しました.
結論:
- NSFは,分泌経路の複数の段階での膜融合イベントにおいて重要な役割を果たします.
- NSFは,膀輸送を媒介する細胞機械の一般的な構成要素です.
- これらの発見は,NSFの既知の機能を,ゴルギ内輸送を超えて拡張しています.
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