PLK1 phosphorylates FOXM1 on serine residues S730 and S739 (S715 and S724 in FOXM1B isoform) in the C-terminal transactivation domain (TAD). PLK1-mediated phosphorylation of FOXM1 upregulates FOXM1 transcriptional activity and is crucial for FOXM1 function at G2/M transition (Fu et al. 2008).
Fu, Z, van Deursen, JM, Li, H, Chen, J, Huang, J, Tindall, DJ, Malureanu, L, Wang, W
protein serine/threonine kinase activity of p-T611-FOXM1:p-T210-PLK1 [nucleoplasm]
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