Functions of actin-interacting protein 1 (AIP1)/WD repeat protein 1 (WDR1) in actin filament dynamics and cytoskeletal regulation.

Functions of actin-interacting protein 1 (AIP1)/WD repeat protein 1 (WDR1) in actin filament dynamics and cytoskeletal regulation.
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DOI:
10.1016/j.bbrc.2017.10.096
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发表时间:
2018-11-25
影响因子:
3.1
通讯作者:
Ono S
Ono S
中科院分区:
生物学4区
文献类型:
--
作者:
Ono S

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肌动蛋白解聚因子(ADF)/cofilin和肌动蛋白相互作用蛋白1 (AIP1),也称为WD-repeat蛋白1 (WDR1),在真核生物中是保守的,在肌动蛋白细胞骨架的动态重组中起关键作用。AIP1优先促进ADF/cofilin修饰的肌动蛋白丝的断裂,但对裸肌动蛋白丝的影响很小。因此,AIP1通常被认为是ADF/cofilin的辅助因子,仅能提高ADF/cofilin的活性水平。然而,遗传学和细胞生物学研究表明,AIP1缺乏通常会导致包括肌肉、上皮和血液在内的多种组织和器官的致死性或严重异常,这表明AIP1是许多依赖肌动蛋白动力学的生物过程的主要调节剂。本文综述了AIP1切断肌动蛋白丝的生化机制以及AIP1在模式生物和人类疾病中的体内功能的研究进展。
Actin-depolymerizing factor (ADF)/cofilin and actin-interacting protein 1 (AIP1), also known as WD-repeat protein 1 (WDR1), are conserved among eukaryotes and play critical roles in dynamic reorganization of the actin cytoskeleton. AIP1 preferentially promotes disassembly of ADF/cofilin-decorated actin filaments but exhibits minimal effects on bare actin filaments. Therefore, AIP1 has been often considered to be an ancillary co-factor of ADF/cofilin that merely boosts ADF/cofilin activity level. However, genetic and cell biological studies show that AIP1 deficiency often causes lethality or severe abnormalities in multiple tissues and organs including muscle, epithelia, and blood, suggesting that AIP1 is a major regulator of many biological processes that depend on actin dynamics. This review summarizes recent progress in studies on the biochemical mechanism of actin filament severing by AIP1 and in vivo functions of AIP1 in model organisms and human diseases.
DOI: 10.1038/nsb0195-28
发表时间: 1995-01-01
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