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登録情報 | データベース: PDB / ID: 7utj | ||||||
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タイトル | Cryogenic electron microscopy 3D map of F-actin bound by human dimeric alpha-catenin | ||||||
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![]() | CELL ADHESION / alpha-catenin / F-actin / F-actin binding protein / cell-cell junction | ||||||
機能・相同性 | ![]() negative regulation of integrin-mediated signaling pathway / CDH11 homotypic and heterotypic interactions / Regulation of CDH19 Expression and Function / Regulation of CDH11 function / gamma-catenin binding / epithelial cell-cell adhesion / zonula adherens / gap junction assembly / cellular response to indole-3-methanol / flotillin complex ...negative regulation of integrin-mediated signaling pathway / CDH11 homotypic and heterotypic interactions / Regulation of CDH19 Expression and Function / Regulation of CDH11 function / gamma-catenin binding / epithelial cell-cell adhesion / zonula adherens / gap junction assembly / cellular response to indole-3-methanol / flotillin complex / vinculin binding / negative regulation of cell motility / catenin complex / apical junction assembly / positive regulation of extrinsic apoptotic signaling pathway in absence of ligand / positive regulation of smoothened signaling pathway / Adherens junctions interactions / negative regulation of protein localization to nucleus / axon regeneration / cytoskeletal motor activator activity / negative regulation of neuroblast proliferation / smoothened signaling pathway / Myogenesis / myosin heavy chain binding / tropomyosin binding / establishment or maintenance of cell polarity / troponin I binding / filamentous actin / mesenchyme migration / actin filament bundle / odontogenesis of dentin-containing tooth / actin filament bundle assembly / skeletal muscle myofibril / striated muscle thin filament / skeletal muscle thin filament assembly / actin monomer binding / intercalated disc / neuroblast proliferation / negative regulation of extrinsic apoptotic signaling pathway in absence of ligand / RHO GTPases activate IQGAPs / stress fiber / ovarian follicle development / skeletal muscle fiber development / extrinsic apoptotic signaling pathway in absence of ligand / titin binding / actin filament polymerization / acrosomal vesicle / VEGFR2 mediated vascular permeability / integrin-mediated signaling pathway / filopodium / adherens junction / actin filament / beta-catenin binding / cell-cell adhesion / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / response to estrogen / male gonad development / calcium-dependent protein binding / actin filament binding / cell junction / intracellular protein localization / cell-cell junction / cell migration / lamellipodium / actin cytoskeleton / cell body / hydrolase activity / cell adhesion / cadherin binding / protein domain specific binding / focal adhesion / intracellular membrane-bounded organelle / calcium ion binding / positive regulation of gene expression / structural molecule activity / magnesium ion binding / Golgi apparatus / RNA binding / ATP binding / identical protein binding / nucleus / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() | ||||||
手法 | 電子顕微鏡法 / らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 2.77 Å | ||||||
![]() | Rangarajan, E.S. / Smith, E.W. / Izard, T. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Distinct inter-domain interactions of dimeric versus monomeric α-catenin link cell junctions to filaments. 著者: Erumbi S Rangarajan / Emmanuel W Smith / Tina Izard / ![]() 要旨: Attachment between cells is crucial for almost all aspects of the life of cells. These inter-cell adhesions are mediated by the binding of transmembrane cadherin receptors of one cell to cadherins of ...Attachment between cells is crucial for almost all aspects of the life of cells. These inter-cell adhesions are mediated by the binding of transmembrane cadherin receptors of one cell to cadherins of a neighboring cell. Inside the cell, cadherin binds β-catenin, which interacts with α-catenin. The transitioning of cells between migration and adhesion is modulated by α-catenin, which links cell junctions and the plasma membrane to the actin cytoskeleton. At cell junctions, a single β-catenin/α-catenin heterodimer slips along filamentous actin in the direction of cytoskeletal tension which unfolds clustered heterodimers to form catch bonds with F-actin. Outside cell junctions, α-catenin dimerizes and links the plasma membrane to F-actin. Under cytoskeletal tension, α-catenin unfolds and forms an asymmetric catch bond with F-actin. To understand the mechanism of this important α-catenin function, we determined the 2.7 Å cryogenic electron microscopy (cryoEM) structures of filamentous actin alone and bound to human dimeric α-catenin. Our structures provide mechanistic insights into the role of the α-catenin interdomain interactions in directing α-catenin function and suggest a bivalent mechanism. Further, our cryoEM structure of human monomeric α-catenin provides mechanistic insights into α-catenin autoinhibition. Collectively, our structures capture the initial α-catenin interaction with F-actin before the sensing of force, which is a crucial event in cell adhesion and human disease. | ||||||
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