Cytokinesis requires localized β-actin filament production by an actin isoform specific nucleator.

Cytokinesis requires localized β-actin filament production by an actin isoform specific nucleator.
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DOI:
10.1038/s41467-017-01231-x
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发表时间:
2017-11-16
影响因子:
16.6
通讯作者:
Wilde A
Wilde A
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chen A;Arora PD;McCulloch CA;Wilde A

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细胞质分裂是由收缩环的局部组装开始的,收缩环是一种动态的肌动球蛋白结构,在分离的染色体团块之间产生膜沟,将细胞分裂成两个。在这里,我们表明细胞动力学沟的稳定和组织特别依赖于细胞分裂位点的局部β-肌动蛋白丝组装。β-肌动蛋白细丝通过抗青霉素依赖的途径直接在沟槽处组装,该途径增强了rhoa依赖的肌动蛋白成核子formin DIAPH3的激活。在体外特异性地产生β-肌动蛋白的均聚细丝。通过使用增强剂和激活剂,细胞可以实现对不同细胞功能所需的同种异型特异性肌动蛋白阵列的急性时空控制。细胞质分裂是由收缩环的局部组装开始的。在这里,作者表明,细胞动力学沟的稳定和组织需要通过肌动蛋白同工异构体特异性核子在细胞分裂位点组装局部的β-肌动蛋白丝。
Cytokinesis is initiated by the localized assembly of the contractile ring, a dynamic actomyosin structure that generates a membrane furrow between the segregating chromosomal masses to divide a cell into two. Here we show that the stabilization and organization of the cytokinetic furrow is specifically dependent on localized β-actin filament assembly at the site of cytokinesis. β-actin filaments are assembled directly at the furrow by an anillin-dependent pathway that enhances RhoA-dependent activation of the formin DIAPH3, an actin nucleator. DIAPH3 specifically generates homopolymeric filaments of β-actin in vitro. By employing enhancers and activators, cells can achieve acute spatio-temporal control over isoform-specific actin arrays that are required for distinct cellular functions. Cytokinesis is initiated by the localized assembly of the contractile ring. Here the authors show that the stabilization and organization of the cytokinetic furrow requires localized β-actin filament assembly at the site of cytokinesis by an actin isoform specific nucleator.
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