Force-dependent allostery of the α-catenin actin-binding domain controls adherens junction dynamics and functions.
Force-dependent allostery of the α-catenin actin-binding domain controls adherens junction dynamics and functions.
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α-catenin肌动蛋白结合结构域的力依赖性变构控制着粘附的连接动力学和功能。
DOI:
10.1038/s41467-018-07481-7
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发表时间:
2018-11-30
影响因子:
16.6
通讯作者:
Ikura M
中科院分区:
文献类型:
--
作者:
Ishiyama N;Sarpal R;Wood MN;Barrick SK;Nishikawa T;Hayashi H;Kobb AB;Flozak AS;Yemelyanov A;Fernandez-Gonzalez R;Yonemura S;Leckband DE;Gottardi CJ;Tepass U;Ikura M
α-catenin is a key mechanosensor that forms force-dependent interactions with F-actin, thereby coupling the cadherin-catenin complex to the actin cytoskeleton at adherens junctions (AJs). However, the molecular mechanisms by which α-catenin engages F-actin under tension remained elusive. Here we show that the α1-helix of the α-catenin actin-binding domain (αcat-ABD) is a mechanosensing motif that regulates tension-dependent F-actin binding and bundling. αcat-ABD containing an α1-helix-unfolding mutation (H1) shows enhanced binding to F-actin in vitro. Although full-length α-catenin-H1 can generate epithelial monolayers that resist mechanical disruption, it fails to support normal AJ regulation in vivo. Structural and simulation analyses suggest that α1-helix allosterically controls the actin-binding residue V796 dynamics. Crystal structures of αcat-ABD-H1 homodimer suggest that α-catenin can facilitate actin bundling while it remains bound to E-cadherin. We propose that force-dependent allosteric regulation of αcat-ABD promotes dynamic interactions with F-actin involved in actin bundling, cadherin clustering, and AJ remodeling during tissue morphogenesis. Cell-cell adhesion mediated by catenin-cadherin complexes plays a critical role in translating the mechanical forces into physiological responses. Here the authors define a mechanism of force-dependent cadherin-actin linkage dynamically regulated through the actin-binding domain of α-catenin.
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影响因子:
64.8
作者:
通讯作者:
--
影响因子:
64.5
作者:
Drees, F;Pokutta, S;Weis, WI
通讯作者:
Weis, WI
影响因子:
4
作者:
Escobar, David J.;Desai, Ridhdhi;Gottardi, Cara J.
通讯作者:
Gottardi, Cara J.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1098/rspb.1988.0038
发表时间:
1988-06-22
期刊:
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES
影响因子:
--
作者:
DEMBO, M;TORNEY, DC;HAMMER, D
通讯作者:
HAMMER, D