Remote control of myosin and kinesin motors using light-activated gearshifting.

Remote control of myosin and kinesin motors using light-activated gearshifting.
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DOI:
10.1038/nnano.2014.147
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发表时间:
2014-09
影响因子:
38.3
通讯作者:
--
中科院分区:
材料科学1区
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--
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细胞骨架马达在真核细胞中执行关键的力产生和运输功能。运动功能的工程修饰提供了蛋白质结构-功能关系的直接测试,以及用于控制细胞过程或利用人工系统中的分子转运的潜在工具。在这里,我们报告了一组细胞骨架马达的设计和表征,当暴露于蓝光时,这些马达可逆地改变齿轮-加速,减速或切换方向。我们的基因编码的结构设计纳入了光活性蛋白质结构域,使光依赖性的构象变化,在工程lever arm. Using在体外运动分析,我们证明了强大的时空控制电机功能和表征动力学的光学换档机制。我们已经使用了一种模块化的方法来创建基于肌动蛋白和基于微管的运输的光学换档电机。
Cytoskeletal motors perform critical force generation and transport functions in eukaryotic cells. Engineered modifications of motor function provide direct tests of protein structure-function relationships and potential tools for controlling cellular processes or for harnessing molecular transport in artificial systems. Here, we report the design and characterization of a panel of cytoskeletal motors that reversibly change gears—speed up, slow down or switch directions—when exposed to blue light. Our genetically encoded structural designs incorporate a photoactive protein domain to enable light-dependent conformational changes in an engineered lever arm. Using in vitro motility assays, we demonstrate robust spatiotemporal control over motor function and characterize the kinetics of the optical gearshifting mechanism. We have used a modular approach to create optical gearshifting motors for both actin-based and microtubule-based transport.
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发表时间: 2012-02-19
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