関連する実験動画
Updated: Jul 22, 2026

17:14
In vivo and in vitro Studies of Adaptor-clathrin Interaction
Published on: January 26, 2011
シナプトタグミンIはクラスリンAP-2の高親和受容体である:膜リサイクルへの影響
J Z Zhang1, B A Davletov, T C Südhof
1Department of Cell Biology and Neuroscience, University of Texas Southwestern Medical Center, Dallas 75235.
Cell
|September 9, 1994
まとめ
シナプス胞は,エンドサイトーシスに不可欠なAP-2複合体を結合します. この研究は,シナプトタグミンIを受容体として特定し,シナプス膀エクソサイトーシスとエンドサイトーシスの両方でその二重の役割を明らかにしました.
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:
- シナプス膀のエクソサイトーシスは,神経末端のエンドサイトーシスに続く.
- シナプス水泡内分細胞症は,レセプター媒介内分細胞症と同様のクラトリンで覆われた穴を使用します.
- クラトリンアダプター複合体AP-2が膜受容体と結合することは,コーティングピット組立に不可欠です.
研究 の 目的:
- シナプス везикул endocytosisのメカニズムを調査する.
- シナプスベシクルにおけるAP-2の高親和感受体を特定する.
- シナプトタグミンIがシナプス膀エンドサイトーシスに作用するかどうかを判断する.
主な方法:
- 競争と直接的な拘束力アッセイが採用されました.
- シナプスベシクルへのAP-2結合親和度を測定した (KD ≈ 1 x 10(-10) M).
- シナプトタグミンIは,AP-2受容体としての特性を分析した.
主要な成果:
- シナプス胞は,高親近性AP-2結合部位を示しています.
- シナプトタグミンIはAP-2受容体の特性を有する.
- AP-2は,シナプトタグミンIの第2のC2ドメインに特異的に結合する.
結論:
- シナプトタグミンIは,シナプス胞のAP-2に対する高親和感受体として特定されています.
- シナプトタグミンIは,シナプス水泡内分細胞症に作用する可能性が高い.
- シナプトタグミンIは,エクソサイトーシスとエンドサイトーシスの両方に関与する多機能タンパク質です.
関連する概念動画
Receptor-mediated Endocytosis
Overview
Receptor-mediated Endocytosis
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Pinching-off of Coated Vesicles
Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
SNAREs and Membrane Fusion
Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
Clathrin Coated Vesicles
Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
Receptor-Mediated Endocytosis
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...

