Tuning molecular motor transport through cytoskeletal filament network organization.

Tuning molecular motor transport through cytoskeletal filament network organization.
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通过细胞骨架丝网络组织调节分子运动运输。

DOI:
10.1039/c9sm01904a
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发表时间:
2020
期刊:
影响因子:
3.4
通讯作者:
Dinner,AaronR
Dinner,AaronR
中科院分区:
化学2区
文献类型:
--
作者:
Scholz,Monika;Weirich,KimberlyL;Gardel,MargaretL;Dinner,AaronR

文献摘要

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在细胞内,交联蛋白在时间和空间上组织细胞骨架丝,以创建动态且结构多样的网络。分子马达在这些网络上移动以产生力和传输过程。传输统计数据如何依赖于网络架构仍不清楚。使用交联蛋白(α-辅肌动蛋白、纤维蛋白、肌成束蛋白或纤丝蛋白)和纯化的肌动蛋白,我们创建了具有不同微观结构的细胞骨架网络。我们跟踪肌球蛋白 II 运动蛋白在这些网络上的运动并计算运输统计数据。我们观察到运动动力学根据底层网络内的细丝捆绑而发生可预测的变化,并讨论了对网络功能的影响。
Within cells, crosslinking proteins organize cytoskeletal filaments both temporally and spatially to create dynamic and structurally diverse networks. Molecular motors move on these networks for both force generation and transport processes. How the transport statistics depend on the network architecture remains poorly characterized. Using cross-linking proteins (α-actinin, fimbrin, fascin, or filamin) and purified actin, we create cytoskeletal networks with diverse microscopic architectures. We track the motion of myosin II motor proteins moving on these networks and calculate transport statistics. We observe that motor dynamics change predictably based on the bundling of filaments within the underlying networks and discuss implications for network function.