RRC ID 56985
Author Li Z, Cui Q, Xu J, Cheng D, Wang X, Li B, Lee JM, Xia Q, Kusakabe T, Zhao P.
Title SUMOylation regulates the localization and activity of Polo-like kinase 1 during cell cycle in the silkworm, Bombyx mori.
Journal Sci Rep
Abstract Polo-like kinase 1 (Plk1) is a crucial cell cycle regulator by its specific localization and activity during cell cycle. It has been shown that the phosphorylation and ubiquitylation of Plk1 are required for its own activation and localization. Here, we report that SUMOylation regulates the activity of Plk1 in the lepidopteran insect of Bombyx mori. In the absence of SUMOylation, it causes the lost localization of Plk1 on centrosomes and kinetochores, as well as an uneven distribution in midzone. We further identify that the putative SUMOylation site of Bombyx Plk1 at lysine 466 is required for its localization on centrosomes, and K466 mutation in Plk1 could influence its interaction with Smt3/Ubc9 complex. These findings are also confirmed by Drosophila Polo and human Plk1, which together reveals a conserved role of Plk1 SUMOylation in mammals. Moreover, conjugation of Smt3 to Plk1 SUMOylation mutant promotes its localization on centrosomes and kinetochores, and rescues functional defects of chromosome alignment in cells depleted of endogenous Plk1. Altogether, the present data indicate that the SUMOylation of Plk1 could participate in proper chromosome alignment and segregation during mitosis, and provides a novel layer for the regulation of Plk1 localization and activity throughout cell cycle.
Volume 7(1)
Pages 15536
Published 2017-11-14
DOI 10.1038/s41598-017-15884-7
PII 10.1038/s41598-017-15884-7
PMID 29138491
PMC PMC5686133
MeSH Animals Bombyx / cytology* Bombyx / enzymology* Bombyx / genetics Cell Cycle* Cell Cycle Proteins / genetics Cell Cycle Proteins / metabolism* Centrosome / enzymology Chromosome Segregation Drosophila / metabolism Insect Proteins / metabolism* Kinetochores / enzymology Mitosis Mutation Protein Serine-Threonine Kinases / genetics Protein Serine-Threonine Kinases / metabolism* Proto-Oncogene Proteins / genetics Proto-Oncogene Proteins / metabolism* Small Ubiquitin-Related Modifier Proteins / metabolism Sumoylation* Ubiquitin-Conjugating Enzymes / metabolism
IF 4.011
Times Cited 2
Silkworms BmN4 cell