PBK/TOPK is a serine/threonine kinase that is phosphorylated and active during mitosis (1).
PBK/TOPK is composed of kinase subdomains and a carboxy-terminal PDZ-Binding domain, which is thought to interact with the tumor suppressor protein hDlg (1).
Increased PBK/TOPK expression has been observed in highly proliferative malignant cell lines, and PBK/TOPK expression is strongly downregulated during terminal differentiation of HL-60 leukemic cells (2,3).
PMA-induced kinase activity toward PBK/TOPK has been observed (4), and cdc2/cyclinB has been shown to phosphorylate PBK/TOPK in vitro, presumably at Thr9 (1).
Potential substrates of PBK/TOPK include p38 MAPK and c-Myc (3,4).
Applications:Suitable for use in ELISA, Western Blot, Flow Cytometry and Immunocytochemistry .