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NuMA regulates mitotic spindle assembly, structural dynamics and function via phase separation
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Journal Article
NuMA regulates mitotic spindle assembly, structural dynamics and function via phase separation
2021
Overview
A functional mitotic spindle is essential for accurate chromosome congression and segregation during cell proliferation; however, the underlying mechanisms of its assembly remain unclear. Here we show that NuMA regulates this assembly process via phase separation regulated by Aurora A. NuMA undergoes liquid-liquid phase separation during mitotic entry and KifC1 facilitates NuMA condensates concentrating on spindle poles. Phase separation of NuMA is mediated by its C-terminus, whereas its dynein-dynactin binding motif also facilitates this process. Phase-separated NuMA droplets concentrate tubulins, bind microtubules, and enrich crucial regulators, including Kif2A, at the spindle poles, which then depolymerizes spindle microtubules and promotes poleward spindle microtubule flux for spindle assembly and structural dynamics. In this work, we show that NuMA orchestrates mitotic spindle assembly, structural dynamics and function via liquid-liquid phase separation regulated by Aurora A phosphorylation.
Mitotic spindle assembly is required for proper cell division, but many underlying mechanisms remain unclear. Here, the authors show that NuMa undergoes liquid-liquid phase separation, condensing on spindle poles during mitotic entry and enriching critical components to promote spindle assembly.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 14/19
/ 14/35
/ 38/89
/ 59
/ 64
/ 82/58
/ 82/80
/ 82/83
/ Assembly
/ Aurora Kinase A - metabolism
/ Cell Cycle Proteins - genetics
/ Cell Cycle Proteins - metabolism
/ Dynactin
/ Dynactin Complex - metabolism
/ Dynein
/ Humanities and Social Sciences
/ Humans
/ Poles
/ Science
/ Spindle Apparatus - chemistry
/ Spindle Apparatus - genetics
/ Spindle Apparatus - metabolism
/ Spindles
