関連する実験動画
Updated: Jun 15, 2026
07:42
In-vivo Detection of Protein-protein Interactions on Micro-patterned Surfaces
Published on: March 20, 2010
生体細胞におけるタンパク質の相互作用ネットワークを空間時間的に解明するアプローチ
Braden T Lobingier1, Ruth Hüttenhain2, Kelsie Eichel3
1Department of Psychiatry, University of California, San Francisco, San Francisco, CA 94158, USA.
Cell
|April 8, 2017
まとめ
この研究は,細胞内のタンパク質の相互作用をマッピングするための空間的参照と近接ラベルを組み合わせた新しい方法を導入しています. このアプローチは,Gタンパク質結合受容体信号伝達ネットワークに関する新しい洞察を明らかにします.
科学分野:
- 細胞生物学
- プロテオミクス
- 生物化学
背景:
- 細胞の機能は 複雑なタンパク質の相互作用ネットワークに依存しています
- APEXのような既存の近接ラベル方式は 時間的な解像度が限られている.
- 特定のタンパク質のネットワークを 調べるには より高い空間解像度が必要です
研究 の 目的:
- タンパク質の相互作用ネットワークの空間的および時間的次元を同時に解明するための新しいアプローチを開発する.
- ネットワーク尋問のための高空間解像度の達成においてAPEXの限界を克服する.
- Gタンパク質結合受容体のシグナル伝達に関与するダイナミックなタンパク質ネットワークを調査する.
主な方法:
- アスコルビック酸ペロキシダース (APEX) を用いて近接ラベルを貼る.
- 定量プロテオミクスを空間的参照システムと組み合わせる
- この方法を用いて,リガンドの活性化時にGタンパク質結合受容体によって誘発されるタンパク質を研究する.
主要な成果:
- タンパク質の相互作用の空間的・時間的側面を同時に解明した.
- Gタンパク質結合受容体信号伝達ネットワークの既知および未知の構成要素を特定した.
- ユビキチン結合受容体のダウンレギュレーションに関与する2つの新しいタンパク質を発見した.
結論:
- 開発された方法は,ダイナミックなタンパク質相互作用ネットワークの高解像度マッピングを可能にします.
- このアプローチは,新しいネットワークコンポーネントと機能を特定するための強力な発見パイプラインとして機能します.
- この発見は,Gタンパク質結合受容体調節に関する新しいメカニズム的な洞察を提供します.
関連する概念動画
02:04Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
02:04Protein-Protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
01:24Overview of Cell-Matrix Interactions
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
01:19Protein Dynamics in Living Cells
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...