Mitotic Control of Planar Cell Polarity by Polo-like Kinase 1.

Mitotic Control of Planar Cell Polarity by Polo-like Kinase 1.
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DOI:
10.1016/j.devcel.2015.03.024
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发表时间:
2015-06-08
期刊:
影响因子:
11.8
通讯作者:
Devenport, Danelle
Devenport, Danelle
中科院分区:
生物学1区
文献类型:
--
作者:
Shrestha, Rezma;Little, Katherine A.;Tamayo, Joel V.;Li, Wenyang;Perlman, David H.;Devenport, Danelle

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During cell division, polarized epithelial cells employ mechanisms to preserve cell polarity and tissue integrity. In dividing cells of the mammalian skin, planar cell polarity (PCP) is maintained through the bulk internalization, equal segregation, and polarized recycling of cortical PCP proteins. The dramatic redistribution of PCP proteins coincides precisely with cell cycle progression, but the mechanisms coordinating PCP and mitosis are unknown. Here we identify Plk1 as a master regulator of PCP dynamics during mitosis. Plk1 interacts with core PCP component, Celsr1, via a conserved polo-box domain (PBD) binding motif, localizes to mitotic endosomes and directly phosphorylates Celsr1. Plk1-dependent phosphorylation activates the endocytic motif specifically during mitosis, allowing bulk recruitment of Celsr1 into endosomes. Inhibiting Plk1 activity blocks PCP internalization and perturbs PCP asymmetry. Mimicking dileucine motif phosphorylation is sufficient to drive Celsr1 internalization during interphase. Thus, Plk1-mediated phosphorylation of Celsr1 ensures PCP redistribution is precisely coordinated with mitotic entry.
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