Buckling of filamentous actin bundles in filopodial protrusions
Buckling of filamentous actin bundles in filopodial protrusions
复制标题
丝状肌动蛋白束在丝状突起中的屈曲
DOI:
10.1007/s10409-019-00838-1
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发表时间:
2019-02
影响因子:
3.5
通讯作者:
Qian Jin
中科院分区:
文献类型:
--
作者:
Wang Yanzhong;Qian Jin
The mechanical behavior of filamentous actin bundles plays an essential role in filopodial protrusions at the leading edge of crawling cells. These bundles consist of parallel actin filaments that are hexagonally packed and interconnected via cross-linking proteins including α-actinin, filamin, and fascin. When pushing against the plasma membrane and/or external barriers, actin bundles in filopodial protrusions inevitably encounter a compressive load. The bending stiffness and buckling stability of actin bundles are therefore important in determining the filopodial architecture and subsequent cell morphology. In this work, we employ a coarse-grained molecular dynamics model to investigate the buckling behavior of cross-linked actin bundles under compression, explicitly accounting for the properties of the constituent filaments and the mechanical description of the cross-linkers. The bending stiffness of actin bundles exhibits a generic size effect depending on the number of filaments in the bundle, explicitly depending on the degree of interfilament coupling. The distinct buckling modes are analyzed for bundles with different coupling states and crosslinker strengths. This study could clarify the stability and buckling mechanisms of parallel packed actin bundles and the structure–function relations of mechanical components in filopodial protrusions.
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影响因子:
4
作者:
Chugh P;Paluch EK
通讯作者:
Paluch EK
DOI:
10.1083/jcb.200603013
发表时间:
2006-09-11
期刊:
The Journal of cell biology
影响因子:
--
作者:
Vignjevic D;Kojima S;Aratyn Y;Danciu O;Svitkina T;Borisy GG
通讯作者:
Borisy GG
影响因子:
3.5
作者:
Zhao Zi-Long;Zhao Hong-Ping;Chang Zheng;Feng Xi-Qiao
通讯作者:
Feng Xi-Qiao
DOI:
--
发表时间:
2009
期刊:
--
影响因子:
--
作者:
A. Stukowski
通讯作者:
A. Stukowski
DOI:
10.1074/jbc.m115.706937
发表时间:
2016-03
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
Isabel Van Audenhove;M. Denert;Ciska Boucherie;Leen Pieters;M. Cornelissen;J. Gettemans
通讯作者:
Isabel Van Audenhove;M. Denert;Ciska Boucherie;Leen Pieters;M. Cornelissen;J. Gettemans