調節されたエクソサイトーシスにおけるシナプトタグミン (p65) の役割
L A Elferink1, M R Peterson, R H Scheller
1Howard Hughes Medical Institute, Department of Molecular and Cellular Physiology, Stanford University, California 94305.
Cell
|January 15, 1993
まとめ
シナプトタグミンは,シナプス胞の重要なタンパク質で,神経細胞の調節されたエクソサイトーシスに不可欠です. シナプトタグミンを標的にする抗体はドーパミンの分泌を阻害し,シナプス伝達におけるドーパミンの役割を果たします.
科学分野:
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- シナプスベジクルには,シナプス伝送を媒介することを提案されたタンパク質が含まれています.
- これらのタンパク質の機能を理解することは,神経細胞のコミュニケーションを解読する鍵です.
研究 の 目的:
- 調節されたエクソサイトーシスにおける特定のシナプス水泡タンパク質の機能を調査する.
- 神経細胞の分泌におけるシナプトタグミンの役割を決定する.
主な方法:
- 5つのシナプス膀タンパク質 (vamp, rab3A,シナプトフィシン,シナプトタグミン,SV2) に対する抗体が生成されました.
- これらの抗体とシナプトタグミンの断片をPC12細胞に微量注入した.
- 調節された分泌は,ドーパミンβ-ヒドロキシラーゼの表面染色によって測定された.
主要な成果:
- シナプトタグミン (p65) に対する抗体のマイクロ注射は,ドーパミンβ-ヒドロキシラーゼの表面染色を減少させた.
- 溶解性シナプトタグミンの断片は,ドーパミンベータ-ヒドロキシラーゼが誘発した表面染色を抑制した.
- 他の膀タンパク質に対する抗体は,分泌に影響を及ぼさなかった.
結論:
- シナプトタグミンは,ニューロンの制御されたエクソサイトーシスに重要な役割を果たします.
- このCa2+) とフォスフォリピド結合タンパク質は,シナプス胞の融合と神経伝達物質の放出に不可欠です.
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