WHAMM is an Arp2/3 complex activator that binds microtubules and functions in ER to Golgi transport.

WHAMM is an Arp2/3 complex activator that binds microtubules and functions in ER to Golgi transport.
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WHAMM是一种ARP2/3复合激活剂,将微管和功能结合到高尔基体转运。

DOI:
10.1016/j.cell.2008.05.032
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发表时间:
2008-07-11
期刊:
影响因子:
64.5
通讯作者:
Welch, Matthew D.
Welch, Matthew D.
中科院分区:
生物学1区
文献类型:
--
作者:
Campellone, Kenneth G.;Webb, Neil J.;Znameroski, Elizabeth A.;Welch, Matthew D.

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Arp 2/3复合物是一种肌动蛋白成核剂,在许多细胞过程中起着关键作用。它的活性受成核促进因子(NPFs)的调节,这些因子主要在质膜动力学过程中发挥作用。在这里,我们确定了一个新的哺乳动物NPF称为WHAMM(WASP同源物与肌动蛋白,膜,微管),定位于顺式高尔基体和管泡膜运输中间体。WHAMM的模块化组织包括介导高尔基体膜结合的N-末端结构域、结合微管的卷曲螺旋区和刺激Arp 2/3介导的肌动蛋白聚合的WCA片段。过表达和缺失研究表明,WHAMM是重要的维持高尔基体结构和促进顺行膜运输。WHAMM与微管相互作用的能力在膜小管中起作用,而其诱导肌动蛋白组装的能力促进小管伸长。因此,WHAMM是一个重要的调节膜动力学功能的微管和肌动蛋白细胞骨架的界面。
The Arp2/3 complex is an actin nucleator that plays a critical role in many cellular processes. Its activities are regulated by nucleation-promoting factors (NPFs) which function primarily during plasma membrane dynamics. Here we identify a new mammalian NPF called WHAMM (WASP Homologue associated with Actin, Membranes, and Microtubules) that localizes to the cis-Golgi apparatus and tubulo-vesicular membrane transport intermediates. The modular organization of WHAMM includes an N-terminal domain that mediates Golgi membrane association, a coiled-coil region that binds microtubules, and a WCA segment that stimulates Arp2/3-mediated actin polymerization. Overexpression and depletion studies indicate that WHAMM is important for maintaining Golgi structure and facilitating anterograde membrane transport. The ability of WHAMM to interact with microtubules plays a role in membrane tubulation, while its capacity to induce actin assembly promotes tubule elongation. Thus, WHAMM is an important regulator of membrane dynamics functioning at the interface of the microtubule and actin cytoskeletons.
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期刊: MOLECULAR CELL
影响因子: 16
作者:
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