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Quantification of the stiffness and strength of cadherin ectodomain binding with different ions

查看全文 作  者:Zhiyang [1]Xu;Dechang [1]Li;Baohua [1]Ji 高影响力作者 机构地区:[1]Biomechanics and Biomaterials Laboratory, Department of Applied Mechanics,Beijing Institute of Technology高影响力机构 出  处:《Theoretical & Applied Mechanics Letters》索引2014年第4卷第3期,共6页高影响力期刊 基  金:supported by the National Natural Science Foundation of China(11025208,11221202,11372042,and 11202026);the Excellent Young Scholars Research Fund of Beijing Institute of Technology 摘  要:The stiffness and strength of extracellular(EC) region of cadherin are proposed to be two important mechanical properties both for cadherin as a mechanotransductor and for the formation of cell-cell adhesion. In this study,we quantitatively characterized the stiffness and strength of EC structure when it binds with different types of ions by molecular dynamics simulations. Results show that EC structure exhibits a rod-like shape with high stiffness and strength when it binds with the bivalent ions of calcium or magnesium. However,it switches to a soft and collapsed conformation when it binds with the monovalent ions of sodium or potassium. This study sheds light on the important role of the bivalent ions of calcium in the physiological function of EC. 关 键 词:二价离子 钙粘蛋白 强度 刚度 分子动力学模拟 量化 外域 细胞粘连
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