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Playing polo during mitosis: PLK1 takes the lead
G Combes1,2, I Alharbi1,2, L G Braga1,2
1Program in Molecular and Cellular biology, Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada.
Polo-like kinase 1 (PLK1) masterfully regulates key mitotic kinases, including Aurora B, Haspin, MPS1, BUB1, and BUBR1, ensuring accurate cell division. This review highlights PLK1's crucial role in controlling these kinases for mitotic fidelity.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Polo-like kinase 1 (PLK1) is a crucial serine/threonine kinase regulating mitosis and cytokinesis in eukaryotes.
- PLK1's diverse functions necessitate intricate regulation of its localization and substrate targeting during cell division.
Purpose of the Study:
- To review recent findings on PLK1's regulation of key mitotic kinases.
- To elucidate PLK1's role as a master regulator of cell division fidelity.
Main Methods:
- Literature review of recent studies on PLK1 and its mitotic kinase substrates.
- Analysis of regulatory mechanisms connecting PLK1 to Aurora B, Haspin, MPS1, BUB1, and BUBR1.
Main Results:
- PLK1 regulates Aurora B and Haspin activity for centromere identity.
- PLK1 controls MPS1 to initiate spindle checkpoint signaling.
- PLK1 coordinates BUB1 and BUBR1 in spindle checkpoint activation/inactivation.
Conclusions:
- PLK1 acts as a master regulator of essential mitotic kinases.
- This regulation is critical for ensuring the fidelity of cell division.
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