フォトスイッチ可能なカデリンの設計
Ryan S Ritterson1, Kristopher M Kuchenbecker, Michael Michalik
1Graduate Group in Biophysics, University of California, San Francisco, San Francisco, California 94158, USA. ryan.ritterson@cal.berkeley.edu
Journal of the American Chemical Society
|August 9, 2013
まとめ
科学者たちは,細胞粘着タンパク質であるE-カデリンの光制御スイッチを設計した. 照明により,カルシウム結合の親和性が変化し,細胞間の粘着と生物学的研究のための信号を正確に制御することが可能になった.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- バイオテクノロジー バイオテクノロジー
背景:
- 細胞同士の結合は,組織の発達と機能に不可欠です.
- E-カデリンは,カルシウムに依存した細胞結合を媒介する.
- タンパク質の機能を光で制御することで,正確な空間と時間の操作が可能になります.
研究 の 目的:
- E-cadherinで光で誘発される機能スイッチを設計する.
- E-カデリンの機能における光による変化のメカニズムを調査する.
- 細胞粘着と信号伝達の研究のためのツールを開発する.
主な方法:
- メカニズムベースの設計戦略.
- 光に敏感なE-カデリンの変種を設計する.
- 照明によるカルシウム結合親近性の変化を評価する.
- カデリンの二分化と機能的なスイッチングを分析する.
主要な成果:
- E-cadherinにおける新しい光誘発スイッチを実証しました.
- 光との表面的なカルシウム結合親和性を18倍に変化させました.
- 変化したカルシウム結合と二酸化にリンクされた機能的なスイッチング.
- スイッチングメカニズムの詳細な検討を提供しました.
結論:
- 照明制御可能なE-cadherinを成功裏に設計しました.
- これは,細胞粘着の正確な操作のための新しいツールを提供します.
- カデリンの生物学とシグナル伝達経路の研究の道を開く.
関連する概念動画
Structure of Cadherins
The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins” is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This diversity of cadherins...
Cadherins in Tissue Organization
The cadherins are a superfamily of cell adhesion molecules comprising over 180 variants, with specific tissues expressing a particular combination of cadherin types. Cadherins generally exhibit homophilic binding; i.e., cadherins on one cell bind to cadherins of the same or closely related type on another cell. Thus, cells of the same type have a specific affinity to bind to each other and sort themselves into clusters to form tissues.
Cell Sorting During Development
Cell sorting plays an...
Cell Sorting During Development
Cell sorting plays an...
Catenins
Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Tension Response at Adherens Junctions
The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin homology) domains...
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin homology) domains...
Desmosomes
The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein complexes comprising desmosomal...
Adherens Junctions
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
The endothelial cells...
Adherens Junctions are Dynamic
The endothelial cells...


