Myosin-driven actin-microtubule networks exhibit self-organized contractile dynamics.
Myosin-driven actin-microtubule networks exhibit self-organized contractile dynamics.
复制标题
肌球蛋白驱动的肌动蛋白-微管网络表现出自组织的收缩动力学。
DOI:
10.1126/sciadv.abe4334
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发表时间:
2021-03
期刊:
影响因子:
13.6
通讯作者:
Robertson-Anderson RM
中科院分区:
文献类型:
--
作者:
Lee G;Leech G;Rust MJ;Das M;McGorty RJ;Ross JL;Robertson-Anderson RM
Microtubules enable organized myosin-driven contraction by providing flexural rigidity and enhanced connectivity to actin networks. The cytoskeleton is a dynamic network of proteins, including actin, microtubules, and their associated motor proteins, that enables essential cellular processes such as motility, division, and growth. While actomyosin networks are extensively studied, how interactions between actin and microtubules, ubiquitous in the cytoskeleton, influence actomyosin activity remains an open question. Here, we create a network of co-entangled actin and microtubules driven by myosin II. We combine dynamic differential microscopy, particle image velocimetry, and particle tracking to show that both actin and microtubules undergo ballistic contraction with unexpectedly indistinguishable characteristics. This contractility is distinct from faster disordered motion and rupturing that active actin networks exhibit. Our results suggest that microtubules enable self-organized myosin-driven contraction by providing flexural rigidity and enhanced connectivity to actin networks. Beyond the immediate relevance to cytoskeletal dynamics, our results shed light on the design of active materials that can be precisely tuned by the network composition.
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影响因子:
4.4
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通讯作者:
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8.6
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DOI:
10.1073/pnas.90.20.9552
发表时间:
1993-10-15
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3.4
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通讯作者:
McGorty, Ryan