The Diverse Family of Arp2/3 Complexes.

The Diverse Family of Arp2/3 Complexes.
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DOI:
10.1016/j.tcb.2016.08.001
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发表时间:
2017-03
影响因子:
19
通讯作者:
Cossart P
Cossart P
中科院分区:
生物学1区
文献类型:
--
作者:
Pizarro-Cerdá J;Chorev DS;Geiger B;Cossart P

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Arp 2/3复合物是一个由7个亚基组成的蛋白复合物,在细胞的吞噬、囊泡运输和片状伪足延伸等重要功能中起着肌动蛋白成核和肌动蛋白丝聚合的作用。Arp 2/3复合物在细胞感染过程中也被细菌病原体和病毒利用。最近的研究表明,该复合物的一些亚基在特定的细胞环境中是不稳定的,指出存在替代的“杂合Arp 2/3复合物”,包含其他组分,如黏着斑蛋白或α-辅肌动蛋白,以及经典Arp 2/3亚基的不同亚型或磷酸化变体。因此,这种多样性,现在应该考虑分配特定的Arp 2/3组件时,不同的肌动蛋白依赖的细胞过程。
The Arp2/3 complex has so far been considered to be a single seven-subunit protein complex required for actin nucleation and actin filament polymerization in diverse critical cellular functions including phagocytosis, vesicular trafficking and lamellipodia extension. The Arp2/3 complex is also exploited by bacterial pathogens and viruses during cellular infectious processes. Recent studies suggest that some subunits of the complex are dispensable in specific cellular contexts, pointing to the existence of alternative ‘hybrid Arp2/3 complexes’ containing other components such as vinculin or α-actinin, as well as different isoforms or phosphorylation variants of canonical Arp2/3 subunits. Therefore, this diversity should be now considered when assigning specific Arp2/3 assemblies to different actin-dependent cellular processes.
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