The MYO6 interactome reveals adaptor complexes coordinating early endosome and cytoskeletal dynamics.

The MYO6 interactome reveals adaptor complexes coordinating early endosome and cytoskeletal dynamics.
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DOI:
10.15252/embr.201744884
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发表时间:
2018-04
期刊:
影响因子:
7.7
通讯作者:
Buss F
Buss F
中科院分区:
生物学2区
文献类型:
--
作者:
O'Loughlin T;Masters TA;Buss F

文献摘要

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肌球蛋白马达的细胞内功能需要许多适配器分子,它们控制货物附着,但也可以在时间和空间上微调运动活动。这些马达-适配器-货物的相互作用通常是弱的、短暂的或高度调控的。为了克服这些问题,我们使用基于邻近标记的蛋白质组学策略来绘制独特的负端定向肌动蛋白运动 MYO6 的相互作用组。详细的生化和功能分析确定了几个不同的 MYO6 适配器模块,包括两个含有 RhoGEF 的复合物:LIFT(LARG 诱导的 F-肌动蛋白用于束缚)复合物,通过 RHO 驱动的肌动蛋白聚合控制内体定位和运动;和 DISP(DOCK7 诱导的 Septin 置换)复合物,一种新型 Septin 细胞骨架调节剂。这些复合物强调了 MYO6 在协调内体动力学和细胞骨架结构中的作用。这项研究提供了第一个肌球蛋白运动蛋白的体内相互作用组,并强调了这种方法在揭示动态和功能多样的肌球蛋白运动复合物方面的力量。
The intracellular functions of myosin motors requires a number of adaptor molecules, which control cargo attachment, but also fine‐tune motor activity in time and space. These motor–adaptor–cargo interactions are often weak, transient or highly regulated. To overcome these problems, we use a proximity labelling‐based proteomics strategy to map the interactome of the unique minus end‐directed actin motor MYO6. Detailed biochemical and functional analysis identified several distinct MYO6‐adaptor modules including two complexes containing RhoGEFs: the LIFT (LARG‐Induced F‐actin for Tethering) complex that controls endosome positioning and motility through RHO‐driven actin polymerisation; and the DISP (DOCK7‐Induced Septin disPlacement) complex, a novel regulator of the septin cytoskeleton. These complexes emphasise the role of MYO6 in coordinating endosome dynamics and cytoskeletal architecture. This study provides the first in vivo interactome of a myosin motor protein and highlights the power of this approach in uncovering dynamic and functionally diverse myosin motor complexes.